DEPARTMENT OF ENVIRONMENTAL PROTECTION Prepared in cooperation with the BEDROCK GEOLOGIC MAP OF THE CHESTER QUADRANGLE U.S. GEOLOGICAL SURVEY WATER RESOURCES MANAGEMENT (TRANQUILITY) MORRIS COUNTY, NEW JERSEY NEW JERSEY GEOLOGICAL AND WATER SURVEY NATIONAL GEOLOGIC MAPPING PROGRAM OPEN FILE MAP OFM 120

(DOVER) o

74 45' 42'30'' (STANHOPE) 40' 74 o 37'30''

¹ o ¹

40 52'30'' ¹ 40 o 52'30''

INTRODUCTION Folds M ¹ ECONOMIC RESOURCES New Jersey Highlands REFERENCES CITED

51 83 EXPLANATION OF MAP SYMBOLS ¹ Ypg

U ¹ Sg

Folds in Paleozoic rocks of the area postdate the development of bedding and formed during 67 64 Diabase dikes (Neoproterozoic) (Volkert and Puffer, 1995) – Light gray- or brown-

Yk ¹ Zd

D 53 27 63 ¹ The Chester 7.5-minute quadrangle is situated in the southwest part of Morris County, in the the Taconian and Alleghanian orogenies at about 450 Ma and 250 Ma, respectively. Folds in rocks of 71 ¹ Mesoproterozoic rocks in the Chester quadrangle host economic deposits of iron 82 ish-gray-weathering, dark-greenish-gray, aphanitic to fine-grained dikes. Composed Barnett, S.G., III, 1976, Geology of the Paleozoic rocks of the Green Pond outlier: New Jersey Contact - Dotted where concealed

¹ ?

New Jersey Highlands physiographic province. Although the bedrock geology of the quadrangle has been the Green Pond Mountain Region and Valley and Ridge are characterized by a broad, open and upright, ¹ U ore (magnetite) mined predominantly during the 19th century, with most of the important

Yd 66 U principally of plagioclase (labradorite to andesine), augite, and ilmenite and (or) Geological Survey Geologic Report Series No. 11, 9 p.

Ypg 74 ¹ 54

? the subject of study for more than a century (Cook, 1868; Bayley, 1910; Bayley and others, 1914; Sims, northeast-plunging syncline that deforms rocks of Cambrian through Silurian age. Paleozoic rocks of D Yh ¹ D D ones concentrated in a belt that extends along the south side of the Lamington River Valley. magnetite. Locally occurring pyrite blebs are common. Contacts are typically chilled Bayley, W.S., 1910, Iron mines and mining in New Jersey: New Jersey Geological Survey 48 ¹ Faults - Dotted where concealed. Queried where uncertain

M 67 ¹

1958; Minard, 1959; Volkert and others, 1990; Herman and Mitchell, 1991), the geologic maps shown in the Peapack klippe were deformed into open to tight, upright anticlines and synclines that plunge an ¹ Descriptions of most of the mines are given in Bayley (1910). Graphite was mined from

Yps D U and sharp against enclosing Mesoproterozoic rocks. Dikes are as much as 20 ft. wide. Bulletin 7, 512 p.

Ypg Yk U these studies lack continuity with the more recent detailed mapping of adjacent quadrangles, as well as average of 15° toward N 57°E and less commonly S 42°W. M ¹ 58 Ypg a single, small prospect east of Peapack Brook (Bayley and others, 1914). Attempts to Ypa ¹ Bayley, W.S., Salisbury, R.D., and Kummel, H.B., 1914, Description of the Raritan quadrangle, Reservoir fault 66 U D High angle fault - U, upthrown side; D, downthrown side conformity with the present geologic framework proposed for Mesoproterozoic rocks in the New Jersey Folds that deform penetrative metamorphic foliation in Mesoproterozoic rocks resulted from ? locate the graphite workings were unsuccessful because they are likely covered over by Vernon Supersuite (Volkert and Drake, 1998) New Jersey: U.S. Geological Survey Geologic Atlas Folio 191, 32 p.

51

Highlands. The geologic map and interpretations presented here therefore supersede those shown on all compressional stresses during the Ottawan phase of the Grenville orogeny. Characteristic fold patterns development. ¹ Byram Intrusive Suite (Drake, 1984) Berry, W.B.N., 1960, Graptolite faunas of the Marathon region, west Texas: University of Texas Ylo Inclined thrust fault - teeth on upper plate ¹ 80

previous bedrock geologic maps of the area of this map. include broad to tight, predominantly northeast-plunging to locally southwest-plunging, upright to north- Paleozoic rocks were quarried from small abandoned operations in the Green Pond Ybh Hornblende granite (Mesoproterozoic) – Pinkish-gray- to buff-weathering, pink- Publication 6005, 179 p.

83 ? This report provides updated, detailed geologic information on the stratigraphy, structure and west overturned antiforms and synforms and, less commonly, east-plunging, upright to north overturned Ybh ¹ Conglomerate in the German Valley, from dolomite of the Kittatinny Valley Sequence and also ¹ ish-white or light-pinkish-gray, medium- to coarse-grained, foliated granite composed Cook, G.H., 1868, Geology of New Jersey: New Jersey Geological Survey, Newark, 900 p. FOLDS description of geologic units in the map area from geologic mapping in 2009 that is combined with prior antiforms and synforms. Relative timing of these fold phases is uncertain but they clearly predate the 72 from rocks of the Peapack klippe in the Peapack-Ralston Valley. Deposits of sand and gravel principally of microcline microperthite, quartz, oligoclase, and hornblende (hastingsite). Drake, A.A., Jr., 1984, The Reading Prong of New Jersey and eastern - An

41 Folds in Proterozoic rocks showing trace of axial surface, direction

Picatinny fault mapping from 1985-1987. Cross-section A-A’ shows a vertical profile of the geologic units and their development of folds in the Paleozoic rocks of the quadrangle and thus are of Mesoproterozoic age. ¹ were worked at a number of locations in the German and Lamington River valleys, mainly in Some variants are quartz monzonite or quartz syenite. Unit commonly includes bodies appraisal of rock relations and chemistry of a major Proterozoic terrane and dip of limbs, and direction of plunge. 67 Ypa structure. Rose diagrams in figures 1-6 provide a directional analysis of selected structural features. Throughout the map area the dominant plunge of mineral lineations in Mesoproterozoic rocks is parallel Sg the vicinity of Succasunna (Witte, 2008). of pegmatite too small to be shown on the map. in the Appalachians, in Bartholomew, M.J., ed., The Grenville event in the

to the axes of major folds. Lineations plunge 40° to 45° toward N 52°E. Minor variations of the dominant Q Appalachians and related topics: Geological Society of America Special Paper 194, ¹ Antiform

47 ? A

STRATIGRAPHY trend plunge an average of 27° to N 79°E and 22° to S 30°W. Yba Microperthite alaskite (Mesoproterozoic) – Pinkish-gray- to buff-weathering, pink- p. 75-109. ¹

Ypg ¹

Mesozoic rocks 50 Cl DESCRIPTION OF MAP UNITS ish-white or light-pinkish-gray, medium- to coarse-grained, foliated alaskite composed Drake, A.A., Jr., Kastelic, R.L., Jr., and Lyttle, P.T., 1985, Geologic map of the eastern parts ¹ Q Q Synform

37 ¹ Sg A A

The youngest bedrock is interpreted as Mesozoic in age and forms thin residuum and slope Faults 72 71 D13 principally of microcline microperthite, quartz, and oligoclase. Locally contains small of the Belvidere and Portland quadrangles, Warren County, New Jersey: U.S.

Turkey Brook fault Cl wash preserved on the crest of Mount Paul, in the southeast part of the map. This residuum is predomi- The structural geology of the Chester quadrangle is dominated by a series of northeast-trending ¹ Q A Newark Basin clots and disseminated grains of magnetite. Geological Survey Miscellaneous Investigations Series Map I-1530, scale 1:24,000.

Ypa ¹ Overturned antiform 44 69 ¹ fault Berkshire Valley fault Q A

nantly reddish-brown quartz pebble conglomerate that likely correlates to conglomeratic facies of the faults that deform both Mesoproterozoic and Paleozoic rocks. From the northwest they include the Reser- A Trpcq Passaic Formation (conglomerate lithofacies) (Upper Triassic) – Dark-reddish-brown Drake, A.A., Jr., and Volkert, R.A., 1991, The Lake Hopatcong Intrusive Suite (Middle

¹ 67 24 ¹ A

Upper Triassic Passaic Formation that crops out in the Gladstone quadrangle south of the map area voir fault, Turkey Brook fault, Longwood Valley fault, Berkshire Valley fault, Picatinny fault, Tanners Brook M 25 ? D12 weathering, grayish red to dark-reddish-brown, medium-bedded, pebble conglomerate in 66 Q A Ybs Hornblende monzonite (Mesoproterozoic) – Pinkish-gray- to buff-weathering, Proterozoic) of the New Jersey Highlands, in Drake, A.A., Jr., ed., Contributions to Overturned synform

¹ D1 (Houghton and Volkert, 1990). fault, Black River fault, Rockaway Valley fault, Powder Mill fault, Mendham fault, and Peapack-Ralston 56 fine- to medium-grained sand and silt matrix. Clasts are subrounded and composed of vein pinkish-gray or greenish-gray, medium- to coarse-grained, foliated monzonite and New Jersey Geology: U.S. Geological Survey Bulletin 1952, p. A1-A9. Ybb 16 ¹ Longwood Valley A 54 78 Sg

thrust fault. 44 quartz, quartz and siltstone and . Unit is confined to the crest of Mount Paul less abundant quartz monzonite composed of microcline microperthite, oligoclase, Drake, A.A., Jr., Volkert, R.A., Monteverde, D.H., Herman G.C., Houghton, H.F., Parker, 20 Minor asymmetric fold – showing rotation sense viewed down plunge

M Q U Paleozoic rocks The Reservoir fault extends beneath Budd Lake in the northwest corner of the map area and is Ymag A D where it does not crop out and was mapped on float. Lower contact is unconformable on hornblende (hastingsite), and quartz. Locally contains clinopyroxene (hedenbergite) R.A., and Dalton, R.F., 1996, Bedrock Geologic Map of Northern New Jersey: U.S. ¹ M

A D

Middle Paleozoic bedrock in the quadrangle consists of the Green Pond Conglomerate of not exposed. However, it is known to be present from mapping in the adjacent Hackettstown quadrangle 49 52 rocks of the Peapack klippe. Thickness is unknown. and hornblende. Geological Survey Miscellaneous Investigations Series Map I-2540-A, Folds in Paleozoic rocks showing trace of axial surface, direction and Silurian age that crops out in the valley south of Succasunna. It comprises one of the formations of the (Volkert and others, 1994) and the Stanhope quadrangle (Volkert and others, 1989) where it contains ¹ Ca scale 1:100,000. dip of limbs, and direction of plunge. Folds in bedding and/or cleavage.

M 70 D

Green Pond Mountain Region, a fault-bounded, northeast-trending belt of Paleozoic rocks that extends Mesoproterozoic rocks on both sides. The fault strikes northeast and dips steeply southeast to vertically. It Ca Green Pond Mountain Region Biotite granite (Mesoproterozoic) – Pinkish-gray- to buff-weathering, pinkish-white or Harris, A.G., Repetski, J.E., Stamm, N.R., and Weary, D.J., 1995, Conodont Age and CAI M A Ybb southwest from New York State to Hunterdon County, New Jersey (Herman and Mitchell, 1991; Drake is characterized by ductile deformation fabric in the center of the fault zone and overprinted by a pervasive ¹ Sg Green Pond Conglomerate (Middle and Lower Silurian) (Rogers, 1836) – Medium- to light pinkish-gray medium- to coarse-grained, foliated granite composed of microcline Data for New Jersey: U.S. Geological Survey Open-File Report 95-557, 31 p. Anticline

72 and others, 1996). brittle deformation fabric that envelops the mylonite over a width of as much as 1,000 ft. The fault records ¹ ? coarse-grained quartz-pebble conglomerate, quartzitic arkose and orthoquartzite, and microperthite, quartz, oligoclase, and biotite. Herman, G.C., and Mitchell, J.P., 1991, Bedrock geologic map of the Green Pond Mountain Ypg Zd

Lower Paleozoic rocks of Cambrian through Ordovician age of the Kittatinny Valley sequence a history of multiple reactivations dating from the Mesoproterozoic involving normal, strike slip, and reverse 32 ? thin- to thick-bedded reddish-brown siltstone. Grades downward into less abundant gray, region from Dover to Greenwood Lake, New Jersey: New Jersey Geological Syncline ¹ ¹

39 Ymp ¹ D8

are present beneath the German (Long) Valley, Lamington River Valley and the unnamed valley south of movement, with latest movement sense being normal. 50 very dark red, or grayish-purple, medium- to coarse-grained, thin- to very thick bedded Lake Hopatcong Intrusive Suite (Drake and Volkert, 1991) Survey, Geological Map Series 91-2, scale 1:24,000.

¹ ? A

Ralston (here named the Peapack-Ralston Valley) where they are in fault contact with, or unconformably The Turkey Brook fault extends through Musconetcong Mountain where it contains Mesoprotero- 54 ¹ 64 12 pebble to cobble-conglomerate containing clasts of red shale, siltstone, sandstone, and ¹ Buff- or white-weathering, greenish-gray, Houghton, H.F., and Volkert, R.A., 1990, Bedrock geologic map of the Gladstone quadrangle, ¹ Pyroxene granite (Mesoproterozoic) –

¹ Ypg PLANAR FEATURES ¹ Ymp Cl

overlie Mesoproterozoic rocks. Locally, Paleozoic rocks of the Jutland klippe sequence are unconformably zoic rocks on both sides. The fault strikes northeast and dips southeast about 75°. It is characterized by 39 Ybh chert; yellowish-gray sandstone and chert; dark-gray shale and chert; and white-gray and medium- to coarse-grained, foliated granite containing mesoperthite to microantiperthite, Morris, Hunterdon, and Somerset Counties, New Jersey: New Jersey Geological

U Cl 58

¹ 34

56 D ? Ca 54 overlain by Mesozoic rocks on Mount Paul. The Kittatinny Valley sequence was previously considered brittle deformational fabric that consists of brecciation, recrystallization and low temperature retrogression ¹ D2 pink milky quartz. Quartz cobbles are as much as 4 in. long. Unconformably overlies the Ca D 3 Yps ¹ 70 quartz, oligoclase, and clinopyroxene (hedenbergite). Common accessory minerals Survey Geologic Map Series GMS 89-4, scale 1:24,000. 50 Ylo A ¹ Strike and dip of crystallization foliation to be part of the Lehigh Valley sequence of MacLachlan (1979) but was reassigned by Drake and others of mafic mineral phases, chlorite or epidote-coated fractures or slickensides, and (or) close-spaced fracture 35 A Leithsville Formation, Allentown Dolomite or Mesoproterozoic rocks. Unit is about 1,000 ft. include titanite, magnetite, apatite, and trace amounts of zircon and pyrite. Howell, B.F., 1945, Revision of Upper Cambrian faunas of New Jersey: Geological Society ? 51

(1996). It includes the Hardyston Quartzite and Kittatinny Supergroup, of which only formations through cleavage. The latest movement sense is normal. Ca D4 ? Yh thick in the map area. of America, Memoir 12, 46 p. 75 ¹ Inclined

35 ? A D 9

the Beekmantown Group crop out in the map area. Lower Paleozoic rocks west of the Peapack-Ralston The Longwood Valley fault borders the northwest side of Long Valley where it contains Mesopro- D5 ¹

A A Ypa Pyroxene alaskite (Mesoproterozoic) – Buff- or white-weathering, greenish-buff to Karklins, O.L., and Repetski, J.E., 1989, Distribution of selected Ordovician conodont faunas

¹ ¹ 47 ¹ 63 fault correlate lithologically and also correlate temporally to the Hensfoot Formation of the Jutland klippe terozoic rocks on both sides. The fault strikes northeast and dips southeast about 75°. It is characterized A 36 62 D ? ¹ Jutland Klippe Sequence Ypa ¹ light pinkish-gray, medium- to coarse-grained, massive, foliated alaskite composed of in northern New Jersey: U.S. Geological Survey Miscellaneous Field Studies Map Vertical

24 D A

sequence (Monteverde and Volkert, 2015). They are confined to the Peapack-Ralston Valley where they by brittle deformational fabric similar to that of the Turkey Brook fault. The latest movement sense on the Yh 50' Hensfoot Formation (Upper to Lower Ordovician) – Interbedded red, tan, gray, and green, mesoperthite to microantiperthite, quartz, oligoclase, and sparse amounts of clinopyrox- MF-2066, scale 1:185,000. 50' 47 72 A D ¹

¹ A Oh are in fault contact with Mesoproterozoic rocks on the west, as well as with Paleozoic rocks of the Kittatin- Longwood Valley fault is normal. 60 ¹ D7 A D6 thin bedded shale and less abundant siltstone, fine-grained sandstone, pinkish-gray quartzite, ene (hedenbergite). Common accessory minerals include titanite, magnetite, apatite, Kümmel, H.B., and Weller, S., 1902, The rocks of the Green Pond Mountain region: New

50 ? Cl Strike and dip of mylonitic foliation

Ymp A ¹ Yh

¹ D Cl

ny Valley sequence on the east. Rocks of the Jutland klippe sequence were folded and thrust over rocks The Berkshire Valley fault contains Paleozoic rocks on both sides along its entire length. It is not 30 D Black River fault Ylb and quartz pebble conglomerate. Locally contains interbedded dark-gray, fine-grained to and trace amounts of zircon. Jersey Geological Survey Annual Report 1901, p. 1-51. ¹ 52 ? A A 70

45 ¹ of the Kittatinny Supergroup during the Taconian orogeny. exposed in the map area or along strike and its occurrence was inferred by Herman and Mitchell (1991) 44 51 61 Ch aphanitic, thin- to medium-bedded ; limestone can be crossbedded, contain floating Lancy Laboratories, 1984, Hydrogeologic study: Simmonds Precision/Co-Operative Indus- Inclined ¹ ¹ ¹ D based on missing stratigraphic units. In the map area it appears to be cut off by the Longwood Valley fault. 60 Ybh quartz sand grains and edgewise conglomerate. Unit correlates to the Hensfoot Formation in Yps Pyroxene monzonite (Mesoproterozoic) – Gray to buff- or tan-weathering, green- tries, Chester, New Jersey: Consultants report on file in the office of the New 50 U Neoproterozoic rocks The Berkshire Valley fault strikes N 40°E and dips southeast about 45°. The fault is characterized by brittle M Cl Ybh Yh the High Bridge quadrangle (Monteverde and others, 2015) and Jutland klippe upper unit B ish-gray, medium- to coarse-grained, massive, indistinctly foliated rock of syenitic to Jersey Geological and Water Survey, Trenton, New Jersey. Zd U Strike and dip of beds D D10 M Dark greenish-gray, medium-grained diabase dikes of Neoproterozoic age intrude Mesoprotero- deformation fabric of indeterminate width. The latest movement sense appears to be reverse. A A (Perissoratis and others, 1979). The upper part of the shale coontains the graptolite faunas monzonitic composition. Composed of mesoperthite, microantiperthite to microcline MacLachlan, D.B., 1979, Geology and mineral resources of the Temple and Fleetwood Yk D ? Ypa 10 zoic rocks in the northwestern part of the map area but not Paleozoic or younger rocks. The dikes strike The Picatinny fault extends along the southeast side of Green Pond Mountain (Herman and Yp ? of the Nemagraptus gracilis to Climacograptus bicornis zones of Ross and others, 1982 (S. microperthite, oligoclase, clinopyroxene (hedenbergite), titanite, magnetite, and local quadrangles, Berks County, Pennsylvania: Pennsylvania Geological Survey Atlas Inclined

Yd northeast and range in thickness from about 1 ft. to possibly as much as 20 ft. They display coarse-grained Mitchell, 1991) and continues southwest through the central German Valley where it contains Paleozoic Ypg Finney written commun. to R. Dalton, 1991 [on file at New Jersey Geological and Water apatite and quartz. 187a, b, scale 1:24,000.

¹ Yk 70 Cl Cl Yb

interiors and fine-grained chilled margins against Mesoproterozoic rocks. Locally, they contain xenoliths rocks on both sides along most of its length. The fault strikes N 40°E and dips southeast about 50°. It 61 D Survey]) now considered the lower part of the Upper Ordovician. Lower dolomite beds contain Markewicz, F.J., 1965, Chester monazite belt: Unpublished report on file in the office of the

¹¹71 Vertical

Yb 61 ¹ ¹ 16 of foliated Mesoproterozoic rocks and magnetite ore. Diabase dikes were emplaced into a rift-related is characterized by brittle fabric that has a total width of not more than a few hundred feet. The latest Ymp ¹ conodonts of North Atlantic Province Oepikodus eve to Baltoniodus navis (Harris and others, Back-Arc Basin Supracrustal Rocks New Jersey Geological and Water Survey, Trenton, New Jersey, 6 p. U ¹ 76 45 ¹ ¹ extensional tectonic setting in the Highlands about 600 million years ago (Ma) (Volkert and Puffer, 1995). movement sense appears to be reverse. Ypg Ch 60 1995) high E to 2 and are late Early Ordovician to early Middle Ordovician. Thickness varies Light-gray- or pinkish-buff-weathering, Yh 19¹10 Yk Potassic feldspar gneiss (Mesoproterozoic) – ______, F.J., 1968, The Hardyston-Leithsville contact and significance of Hyolithellus Overturned ? ? 79 ¹ Yb 51 The Tanners Brook-Green Pond fault is here interpreted as the merged Green Pond fault that Yp M and may be as much as 1,500 ft. 30 16 pinkish-white or light-pinkish-gray, medium-grained and locally coarse-grained, foliated micans in the lower Leithsville Formation: [abs.], New Jersey Academy of Science

Mesoproterozoic rocks extends from the Newfoundland quadrangle to the Dover quadrangle (Kümmel and Weller, 1902; Barnett, M Ymg Yd gneiss composed of quartz, microcline microperthite, oligoclase, and varied amounts of Bulletin, v. 13, p. 96. 80 Strike and dip of cleavage in Paleozoic rocks

Yk Ylo Ybh Ypa ¹

Rocks of Mesoproterozoic age of the New Jersey Highlands are present throughout the 1976; Herman and Mitchell, 1991) and the Tanners Brook fault that extends through the map area (Volkert Ypa A Kittatinny Valley Sequence biotite, garnet and magnetite. Markewicz, F.J., and Dalton, R.F., 1977, Stratigraphy and applied geology of the lower

D Yb Yp ¹

quadrangle. They include a heterogeneous assemblage of granites, gneisses and rare marble. Meso- and others, 1990) and continues southwest. In the map area the fault contains mainly Paleozoic rocks on ¹ D Beekmantown Group, upper part (Lower Ordovician) – Light- to medium-gray- to yellow-

66 ¹ 56 Paleozoic carbonates in northwestern New Jersey, in 42nd Annual Field Conference

¹ 6 Obu ¹ ¹ Yd 80 U A D ¹ proterozoic rocks were metamorphosed to granulite facies at about 1045 Ma (Volkert and others, both sides to the northeast and both Mesoproterozoic rocks and Paleozoic rocks to the southwest. The ¹ ish-gray-weathering, medium-light to medium-gray, aphanitic to medium-grained, thin- to

73 Picatinny fault A 10 Ymg Monazite gneiss (Mesoproterozoic) – Buff weathering, light-greenish-gray to green- of Pennsylvania Geologists, Guidebook, 117 p. LINEAR FEATURES

D 76 68

2010) during the Ottawan phase of the Grenville orogeny. Estimated temperature for this high-grade fault strikes N 40°E and dips northwest about 75°. It is characterized by brittle deformation fabric that has Yh 36 40 thick-bedded, locally laminated, slightly fetid dolomite. Locally light-gray- to light-bluish-gray- ish-buff, medium-grained, foliated gneiss composed of microcline microperthite, quartz, Minard, J.P., 1959, The geology of Peapack-Ralston Valley in north-central New Jersey: ¹ 58 ¹ Yp Ylo

metamorphism is constrained from regional calcite-graphite thermometry to 769°C (Peck and others, a width of 300 to 400 ft. The latest movement was predominantly normal, although evidence for reverse Yh weathering, medium- to dark-gray, fine-grained, medium-bedded limestone occurs near the oligoclase, biotite, and monazite. Locally contains hornblende, zircon, and magnetite. Unpublished M.S. thesis, New Brunswick, New Jersey, Rutgers University, 103 p. 30 Bearing and plunge of mineral lineation in Proterozoic rocks

60 82 ? Yp Yh

2006). The oldest units in the quadrangle include calc-alkaline rocks of the Losee Suite interpreted as movement is also seen in the Dover quadrangle (Herman and Mitchell, 1991) and the map area. ¹ Ypg M M Yd top of unit. Grades downward into medium- to dark-gray on weathered surface, medium- Monteverde, D.H., and Volkert, R.A., 2015, Bedrock geologic map of the High Bridge quad-

69 ¹ 72 Yh

The newly-recognized Black River fault extends along the southeast side of the Lamington River ¹ to dark-gray where fresh, medium- to coarse-grained, medium- to thick-bedded, strongly

having formed in a continental-margin magmatic arc and spatially associated supracrustal rocks formed ¹ Biotite-quartz-feldspar gneiss (Mesoproterozoic) – Gray-weathering, locally rusty, rangle, Hunterdon and Warren Counties, New Jersey: New Jersey Geological and 20

Yps (MENDHAM) Yb Bearing and plunge of intersection of bedding and cleavage

¹

76 ¹ 24 in a back-arc basin, inboard of the Losee magmatic arc (Volkert, 2004). In the map area, the Losee Valley where it contains Mesoproterozoic rocks on the footwall and Paleozoic rocks on the hanging wall, ¹ 69 fetid dolomite contains pods, lenses and layers of dark-gray to black rugose chert. Lower gray, tan, or greenish-gray, medium- to coarse-grained, layered and foliated gneiss (HACKETTSTOWN) Water Survey, Geologic Map Series GMS 15-2, scale 1:24,000. ¹ ¹¹ Longwood Valley fault ? 36

Suite includes metamorphosed plutonic rocks mapped as quartz-oligoclase gneiss, albite-oligoclase and along strike to the northeast Paleozoic rocks on both sides. The fault is not exposed and is known Yp Ybh 61 contact conformable and grades into the fine-grained, laminated dolomite of Beekmantown containing microcline microperthite, oligoclase, quartz, and biotite. Locally contains Nason, F.L., 1891, The Post-Archaen age of the white limestone of Sussex County, New 75 M Ypg 76

alaskite and diorite, and metamorphosed volcanic rocks mapped as biotite-quartz oligoclase gneiss, hy- mainly from drill hole and test well data (Lancy Laboratories, 1984). The fault strikes northeast and dips ¹ Group, lower part. Contains conodonts of North American Midcontinent province Rossodus garnet, sillimanite, and magnetite. Graphite and pyrrhotite are present in rusty gneiss. Jersey: New Jersey Geological Survey, Annual Report of the State Geologist for

Cl OTHER FEATURES ¹ U 82 persthene-quartz-plagioclase gneiss and amphibolite. Elsewhere in the Highlands, rocks of the Losee southeast about 70°. It is characterized by brittle deformation fabric of indeterminate width and the latest Yd manitouensis zone to Oepikodus communis zone (Karklins and Repetski, 1989), so that Commonly contains interlayers of light-gray, vitreous, medium-grained, massive to 1890, p. 25-50.

D ¹ 63 M

Suite have yielded sensitive high-resolution ion microprobe (SHRIMP) U-Pb zircon ages of 1282-1248 movement sense is normal. 79 Ymg unit is Ibexian (Tremadocian to Arenigian) as used by Sweet and Bergstrom (1986). In map Cl Ylo Ypg foliated quartzite composed principally of quartz and variable amounts of graphite. Offield, T.W., 1967, Bedrock geology of the Goshen-Greenwood Lake area, New York: New Abandoned mine – M, magnetite; G, graphite Ch M ¹ Ma (Volkert and others, 2010). Supracrustal rocks include quartzofeldspathic rocks mapped as potas- The Rockaway Valley fault extends through the eastern part of the map area where it bifurcates ? area, unit correlates with the Epler and Rickenbach Dolomite of Drake and others (1985) York State Museum and Science Service Map and Chart Series, no. 9, 78 p. 79 Yh D sic-feldspar gneiss, monazite gneiss, biotite-quartz-feldspar gneiss, clinopyroxene-quartz-feldspar and contains Mesoproterozoic rocks on both sides. It does not appear to continue and may lose displace- and the Ontelaunee Formation of Markewicz and Dalton (1977). Unit averages about 200 ft. Ymp Clinopyroxene-quartz-feldspar gneiss (Mesoproterozoic) – Pinkish-gray- or Palmer, A.R., and Rozanov, A.Y., 1967, Archaeocyatha from New Jersey: Evidence for an Abandoned rock quarry – G, gneiss; Q, quartzite; D, dolomite; Sh, shale

gneiss, calc-silicate rocks mapped as pyroxene gneiss and metacarbonate rocks mapped as marble. ment and end in the south-central part of the area. The fault strikes northeast and dips southeast about Cl D11 Ybh in thickness and is as much as 800 ft. thick. pinkish-buff-weathering, white, pale-pinkish-white, or light-gray, medium- to locally intra-formational unconformity in the north-central Appalachians: Geology, v. 4, p. ¹

A Ybh ¹ 25 Ybs

Monazite gneiss is unique to the map area where it is confined to the flanks of the Fox Hill Range, west 65° to 70°. It is characterized mainly by brittle deformation fabric that overprints an earlier, steeply-dipping ? 60 ¹ ¹ U coarse-grained, foliated gneiss composed of quartz, microcline, oligoclase, clinopyrox- 773-774. Location of bedrock subcrop or float used to draw unit contacts ¹ Yp of the Tanners Brook fault. It contains abundant monazite and is interpreted as sediment that formed ductile deformation fabric. The latest movement sense is normal. 52 Q 54 Beekmantown Group, lower part (Lower Ordovician to Upper Cambrian) – Upper 60 A G M Yb 76 D OCbl ene, and trace amounts of epidote, biotite, titanite, and magnetite. Peck, W.H., Volkert, R.A., Meredith, M.T., and Rader, E.L., 2006, Calcite-graphite A Ch 44 D as a small fluvial placer eroded from a monazite-rich, continentally-derived source (Markewicz, 1965; The Powder Mill fault extends through the southeastern part of the area where it merges with, or ¹ ¹ Ypg sequence is light- to medium-gray- to dark-yellowish-orange-weathering, light-olive-gray thermom etry of the Franklin Marble, New Jersey Highlands: Journal of Geology, v. A Well bottoming in dolomite, D; quartzite, Q. Number corresponds to

Volkert and Drake, 1999). Supracrustal rocks have yielded SHRIMP U-Pb zircon ages of 1299-1251 Ma is cut off by the Mendham fault. It contains Mesoproterozoic rocks on both sides. The fault strikes N 40°E G U to dark-gray, fine- to medium-grained, very thin- to medium-bedded locally laminated dolo- Pyroxene gneiss (Mesoproterozoic) – White- or tan-weathering, greenish-gray, 114, p. 485-499.

A Ylo Yp numbering on Table 1. (Volkert and others, 2010) that closely overlap the age of the Losee Suite. and dips southeast about 60°. It is characterized by an earlier ductile deformation fabric that is overprinted ? D mite. Middle sequence is olive-gray- to light-brown- and dark-yellowish-orange-weathering, medium-grained, well layered and foliated gneiss containing oligoclase, clinopyroxene, Perissoratis, C., Brock, P.W.G., Brueckner, H.K., Drake, A.A., Jr., and Berry, W.B.N., 1979,

Yb M ¹ 46 Granite and related rocks of the Byram and Lake Hopatcong Intrusive Suites that comprise by a brittle deformation fabric. The latest movement sense is reverse. Ch Ch ¹ medium- to dark-gray, aphanitic to medium-grained, thin-bedded, locally well laminated do- and sparse amounts of hornblende, epidote, titanite, or scapolite. Quartz content is The Taconides of western New Jersey: New evidence from the Jutland Yb Form lines showing foliation in Proterozoic rocks in cross section 20 the Vernon Supersuite (Volkert and Drake, 1998) form a complete differentiation series that includes The Tewksbury fault extends through the southern part of the area where it contains Mesopro- Yps Ylo lomite which grades into discontinuous lenses of light-gray- to light-bluish-gray-weathering, highly variable. Unit is commonly interlayered with pyroxene-bearing amphibolite. klippe: Geological Society of America Bulletin, Part II, v. 90, p. 154-177. Ch Yd Rockaway Valley fault monzonite, quartz monzonite, granite, and alaskite of the Byram Suite and of the Lake Hopatcong terozoic rocks on the footwall and the hanging wall. It is interpreted as a Proterozoic fault that is cut off Tanners Brook fault ¹49 64 ¹ medium- to dark-gray, fine-grained, thin- to medium-bedded limestone. Limestone has “re- Rogers, H.D., 1836, Report on the geological survey of the State of New Jersey: Philadelphia,

M ¹

Suite. Rocks of both suites intrude the Losee Suite and supracrustal rocks. Byram and Lake Hopatcong to the east by the Mesozoic-age Flemington fault. The Tewksbury fault strikes east-northeast and dips Yd 47 ticulate” mottling characterized by anastomosing light-olive-gray- to grayish-orange-weath- Marble (Mesoproterozoic) – White, coarse-crystalline, calcitic marble with accessory Desilver, Thomas, & Co., 174 p. ¹ ¹

Ybh 58 28¹ Yh Ymr

rocks yielded similar SHRIMP U-Pb zircon ages of 1185-1182 Ma (Volkert and others, 2010). Large southeast about 50°. It is characterized by brittle deformation fabric that overprints an earlier steeply ¹ 45 ering, silty dolomite laminae surrounding lenses of limestone. Limestone may be complete- clinopyroxene, serpentine and phlogopite. Unit is confined to one very small occurrence

45 Rockaway Valley fault Ross, R.J., Jr., Adler, F.J., Amsden, W.T., Bergstrom, Douglas, Bergstrom, S.M., Carter,

¹ ¹ ¹

46 47'30''

bodies of hornblende- and clinopyroxene-bearing granite mapped as microantiperthite granite and southeast-dipping ductile deformation fabric. The latest movement sense is normal. ¹ Yd ly dolomitized locally. Grades downward into medium dark- to dark-gray, fine-grained, well along the east side of Peapack Brook, but does not crop out and was mapped on the Claire, Churkin, Michael, Cressman, E.A., Derby, J.R., Dutro, J.T., Ethington, R.L.,

47'30'' ¹ Yd

71 Black River fault 74 Yb 83

¹ ¹ 29

minor microantiperthite alaskite crop out in the central and northern part of the area. Although undated, The Flemington fault borders the west side of Peapack-Ralston Valley where it places Paleozoic 12 ¹ ¹ laminated dolomite having local pods and lenses of black to white chert. Lower sequence basis of rare float. Finney, S.C., Fisher, D.W., Fisher, J.H., Harris, A.G., Hintze, L.F., Ketner,

68 ¹ 30 26 Ylo ¹

¹ ¹

microantiperthite granite appears to grade along strike into hornblende granite of the Byram Suite and Mesozoic rocks of the hanging wall against Mesoproterozoic rocks of the footwall. The fault strikes 50 U 75 57 consists of medium- to medium-dark-gray, aphanitic to coarse-grained, thinly-laminated K.B., Kolata, D.L., Landing, Ed., Neuman, R.B., Pojeta, John Jr., Potter, A.W., Rader, ¹ ¹

71 ¹

Cl 63 72 ¹ Ylo suggesting, but not proving that it may share a common age and origin with the Vernon Supersuite. northeast and dips southeast about 50°. It is characterized by brittle deformation fabric along most of its ¹ to thick-bedded, slightly fetid dolomite having quartz-sand laminae and sparse, very thin

¹ 63 Magmatic Arc Rocks E.K., Repetski, J.E., Shaver, R.H., Sweet, W.C., Thompson, T.L. and Webers, G.F.,

Ch 72 D ¹ 18

¹ ¹ 30 TABLE 1. Records of wells in dolomite in the German

¹ ¹ Yb 17

For this reason it and alaskite are shown as having an uncertain correlation to other granitic rocks in length, but at Pottersville, in the Gladstone quadrangle, a thick zone of ductily deformed Mesoproterozoic ¹ to thin, black chert beds. Individual bed thickness decreases and floating quartz sand Losee Suite (Drake, 1984; Volkert and Drake, 1999) 1982, The Ordovician System in the United States: International Union of Geological

Yb 70 M M 59 Valley (GV) and Lamington River Valley (LV)* ¹ 25 56 36 ¹ the map area. Similarly, a small body of biotite-plagioclase gneiss in the eastern part of the area is of rocks is preserved on the footwall of the fault (Houhton and Volkert, 1990). The latest movement sense M ? content increases toward lower gradational contact. Contains conodonts of North American Quartz-oligoclase gneiss (Mesoproterozoic) – White-weathering, light-greenish-gray, Sciences, Publiciation 12, 73 p. 65 Yb M Yb 51 Ylo uncertain age and correlation. It is deformed by a penetrative metamorphic foliation so all that can be is normal with a component of right-lateral strike-slip. Midcontinent province Cordylodus proavus to Rossodus manitouensis zones (Karklins and medium- to coarse-grained, moderately layered and foliated gneiss to indistinctly

M Ylo Sims, P.K., 1958, Geology and magnetite deposits of Dover District, Morris County, New Well no. Total depth Log or bedrock drilled

Ch Ybh A D said at this time is that it is older than the 1045 Ma high-grade metamorphism. The Peapack-Ralston thrust fault extends through the southeastern part of the map area where Yps Ymag ¹ Repetski, 1989) as used by Sweet and Bergstrom (1986), so that unit is Ibexian (Tremado- foliated gneiss and less abundant granofels composed of oligoclase or andesine, quartz, Jersey: U.S. Geological Survey Professional Paper 287, 162 p.

¹ M U (location) (ft .) (depth in ft . below ground surface) ¹ The youngest Mesoproterozoic rocks are irregular bodies of granite pegmatite too small to be it contains Mesoproterozoic and Paleozoic rocks of the Kittatinny Valley Sequence on the hanging wall Yb 69 ¹ 36 cian). Entire unit is Stonehenge Limestone of Drake and others (1985) and Stonehenge

M Ylo 68 U and variable amounts of hornblende, biotite, and clinopyroxene. Locally contains thin, Sweet, W.C., and Bergstrom, S.M., 1986, Conodonts and biostratigraphic correlation: Annual

68 1 (GV) unknown Bottomed in Leithsville Fm.

shown on the map. They are undeformed, contain xenoliths of foliated gneiss and intrude most other and Paleozoic rocks of the Peapack klippe on the footwall. The fault strikes northeast and dips southeast Ylo ¹ D Formation of Volkert and others (1989). Markewicz and Dalton (1977) correlate upper and conformable layers of amphibolite. Review of Earth and Planetary Science, v. 14, p. 85-112.

¹ Ypg 38 2 (GV) 400 Bottomed in Allentown Dolomite

¹ Mesoproterozoic rocks in the map area. Pegmatites elsewhere in the Highlands yielded U-Pb zircon ages about 40°. It is characterized mainly by brittle deformation fabric but may also contain an earlier ductile ¹ middle sequences as Epler Formation and lower sequence as Rickenbach Formation. Unit Volkert, R.A., 1996, Geologic and engineering characteristics of Middle Proterozoic rocks of

¹ Ybh 3 (GV) 250 Bottomed in Allentown Dolomite

69 67

of 1004 to 986 Ma (Volkert and others, 2005) indicating they were emplaced following the metamorphic deformation fabric as well. The latest movement sense is reverse. ¹ Yd Yb 66 Flemington fault is about 600 ft. thick. Albite-oligoclase alaskite (Mesoproterozoic) – White-weathering, light-greenish-gray, the Highlands, northern New Jersey, in Engineering geology in the metropolitan ¹ Yla

36 70 ¹ 63 9 4 (GV) unknown Bottomed in Allentown Dolomite

Tanners BrookYmg fault Ybh peak of the Grenville orogeny. ¹ 50 medium- to coarse-grained alaskite and local granite composed of characteristic pink and Yk 44 50 Yb Oh environment: Field Guide and Proceedings of the 39th Annual Meeting of 5 (GV) 250 0-152 – overburden Yb ¹ 70 (Wherry, 1909) – Upper sequence is light-gray-

Joints 63 59 Allentown Dolomite (Upper Cambrian) white albite or oligoclase, quartz, and variable amounts of hornblende and (or) augite, the Association of Engineering Geologists, p. A1-A33. – Ybh Ylo 35 Ca 152 -178 Allentown Dolomite

STRUCTURE Joints are a ubiquitous feature in all rocks of the quadrangle. They are characteristically planar, Powder Mill fault to medium-gray-weathering, medium-light- to medium-dark-gray, fine- to medium-grained, and magnetite. Appears to be spatially related to quartz-oligoclase gneiss from which it ______, 2004, Mesoproterozoic rocks of the New Jersey Highlands, north-central

83 77 178 -250 – Leithsville Fm. ¹ Yd Ylo ¹ ¹

Paleozoic bedding and cleavage moderately well formed, moderately to widely spaced, and moderately to steeply dipping. Surfaces of ¹ 72 locally coarse-grained, medium- to very thick-bedded dolomite; local shaly dolomite may have formed through sodium metasomatism. Unit is confined to a single, small body Appalachians: petrogenesis and tectonic history, in Tollo, R.P., Corriveau, 6 (GV) 303 0-125 – overburden

59

Bedding in Paleozoic rocks of the Green Pond Mountain Region and the Valley and Ridge part joints are typically unmineralized, except where near faults, and are smooth and less commonly slightly 79 ¹ M near the bottom. Floating quartz sand and two series of medium-light- to very light-gray, along Peapack Brook in the southern part of the map. 55¹ L., McLelland, J., and Bartholomew, J., eds., Proterozoic tectonic evolution of the ¹ M 16 6 125 -180 – Allentown Dolomite ¹

M ¹ Yb 43 26 ¹ of the map area is fairly uniform and strikes northeast at an average of N 48°E (fig. 1) and dips northwest irregular. Joints are spaced from a foot to several feet apart. Those developed in massive rocks such as Peapack - Ralston fault medium-grained, thin-bedded quartzite and discontinuous dark-gray chert lenses occur Grenville orogen in North America: Geological Society of America Memoir ¹ 18 M 180 303 – Leithsville Fm.

59 80 76 -

76 55 63

or southeast at 24° to 90° and averages 74°. Bedding in Paleozoic rocks of the Peapack klippe strikes granite tend to be more widely spaced, irregularly formed and discontinuous than joints in the layered Yb directly below upper contact. Lower sequence is medium- to very-light-gray-weathering, Biotite-quartz-oligoclase gneiss (Mesoproterozoic) – White- or light-gray-weathering, 197, p. 697-728. 7 (GV) unknown Bottomed in Leithsville Fm.

75 M Ylb

¹ Ybh 71

northeast at an average of N 55°E (fig. 2) and dips northwest or southeast at 32° to 81° and averages gneisses and finer-grained Paleozoic rocks. Those formed near faults are typically spaced <2 feet apart. ¹ light- to medium dark-gray, fine- to medium-grained, thin- to medium-bedded dolomite and medium-gray or greenish-gray, medium- to coarse-grained, moderately well layered and

Ymag 79 ¹ Yb 57 Volkert, R.A., Aleinikoff, J.N., and Fanning, C.M., 2010, Tectonic, magmatic, and 8 (LV) 708 0-275 – overburden

M Ymag ¹

61 ¹ 79

¹ ¹

62°. Joints are developed in all Paleozoic rocks, but are more common in massive rocks such as ¹ shaly dolomite. Weathered exposures characterized by alternating light- and dark-gray foliated gneiss composed of oligoclase or andesine, quartz, biotite, and trace amounts of metamorphic history of the New Jersey Highlands: New insights from SHRIMP – M ¹ 66 275 -450 Allentown Dolomite

Ylo ¹ 25 68

40 44 70 14

Cleavage (closely-spaced parallel partings) is present in most Paleozoic rocks but is best limestone, dolomite and sandstone. Two main joint sets are present, one of which is nearly parallel to 82 M 59 65 ¹ beds. Ripple marks, oolites, algal stromatolites, cross-beds, edgewise conglomerate, mud garnet. Some outcrops contain hornblende. Locally contains thin, conformable layers of U-Pb geochronology, in Tollo, R.P., Bartholomew, M.J., Hibbard, J.P., and 450 -708 – Leithsville Fm. ¹

¹ 79 developed in finer-grained lithologies such as shale and slate of the Jutland klippe sequence. A single the strike of bedding and the other is a cross joint (fig. 5). Bedding-parallel joints strike northeast at an Yd M 47 45 52 cracks, and paleosol zones occur throughout but are more abundant in lower sequence. amphibolite. Karabinos, P.M., eds., From Rodinia to Pangea: The Lithotectonic Record 9 (LV) 504 0-200 – overburden

M M 42

Ybh 14 ¹ spaced cleavage in Paleozoic rocks of the Green Pond Mountain Region and the Valley and Ridge average of N 59°E and dip northwest at an average of 50°. The cross joints strike at an average of N ¹ ¹ Lower contact gradational into Leithsville Formation. Unit contains a fauna of Dres- of the Appalachian Region, Geological Society of America Memoir 206, p. 307-346. 200 -504 – Leithsville Fm. Yk 82 M 70 84

strikes northwest at N 65°W and dips northeast at an average of 62°. Slaty cleavage predominates in 35°W and dip northeast and, less commonly, southwest at an average of 71°. ¹ 55 Trpcq 81 bachian (early Late Cambrian) age (Weller, 1903; Howell, 1945). Approximately 1,800 ft. Hypersthene-quartz-plagioclase gneiss (Mesoproterozoic) – Gray- or tan-weath- Volkert, R.A., and Drake, A.A., Jr., 1998, The Vernon Supersuite: Mesoproterozoic A-type 10 (LV) 422 0-195 – overburden 74 ¹ Ylo Obu 80 Yh rocks of the Peapack klippe. It strikes an average of N 53°E, nearly parallel to the trend of bedding, The dominant joints in Mesoproterozoic rocks are nearly perpendicular to the strike of crystalli- 51 Ypg thick regionally. ering, greenish-gray or greenish-brown, medium-grained, moderately well layered granitoid rocks in the New Jersey Highlands: Northeastern Geology and 195 -422 – Leithsville Fm

56 57

Yb ¹

and dips northwest or southeast at 38° to 86° and averages 63° (fig. 3). A secondary cleavage that zation foliation, a consistent feature in Mesoproterozoic rocks throughout the Highlands (Volkert, 1996). Yd OCbl and foliated, greasy lustered gneiss composed of andesine or oligoclase, quartz, Environmental Sciences, v. 20, p. 39-43. 11 (LV) 242 0-155 – overburden

¹ Yp Oh

¹ 62 U 32 – crenulates and cuts the primary cleavage strikes northeast at an average of N 46°E and dips northwest Therefore, their strike is somewhat varied because of folding. The dominant joints in Mesoproterozoic 26 Yd 46 Leithsville Formation (Middle to Lower Cambrian) (Wherry, 1909) – Upper sequence, clinopyroxene, hornblende, and hypersthene. Commonly contains thin, conformable ______, 1999, Geochemistry and stratigraphic relations of Middle Proterozoic rocks of the 155 -242 Leithsville Fm ¹ Cl

64 D 87

¹ 12 (LV) 700 0-122 – overburden rocks strike northwest at an average of N 52°W (fig. 6) and dip moderately to steeply nearly equally ¹ rarely exposed, is mottled, medium-light- to medium-dark-gray-weathering, medium- to me- New Jersey Highlands, in Drake, A.A., Jr., ed., Geologic Studies in New Jersey and

or southeast at an average of 30°. 68 Yh Ylo 38 layers of amphibolite and mafic-rich quartz-plagioclase gneiss.

69 ¹ fault ¹ 72 Ca 122 -603 – Dolomite northeast or southwest. A minor strike joint set trends northeast at an average of N 65°E and dips mainly ¹ 50 dium-dark-gray, fine- to medium-grained, medium- to thick-bedded, locally pitted and friable eastern Pennsylvania: U.S. Geological Survey Professional Paper 1565C, 77 p.

A M 79 Yps 58 Cl 79

Proterozoic foliation northwest. The average dip of all joints in the Mesoproterozoic rocks is 71°. 74 dolomite. Middle sequence is grayish-orange or light- to dark-gray, grayish-red, light-green- Light-gray- to tan-weathering, greenish-gray or green- Volkert, R.A., Markewicz, F.J., and Drake, A.A., Jr., 1990, Bedrock geologic map of the 603 -607 – Dolomite + voids ¹ Diorite (Mesoproterozoic) –

56 Ybh Yd ¹ ¹ ¹ ¹ M Ybh ¹ 75 607 700 – Dolomite Crystallization foliation (the parallel alignment of mineral grains) in the Mesoproterozoic rocks 56 39 ¹ ish-gray- or dark-greenish-gray-weathering, aphanitic to fine-grained, thin- to medium-bed- ish-brown, medium- to coarse-grained, greasy lustered, massive, moderately foliated Chester quadrangle, Morris County, New Jersey: New Jersey Geological Survey, - ¹ Ylo Yp Yb

59 Yd 81 ¹ 13 (LV) 223 0-211 – overburden

formed from compressional stresses that deformed the rocks during high-grade metamorphism at about 75 45 Ch ded dolomite, argillaceous dolomite, dolomitic shale, quartz sandstone, siltstone, and rock containing andesine or oligoclase, augite, hornblende, hypersthene, and magne- Geologic Map Series 90-1, scale 1:24,000.

Ylo ¹

¹ 64 Yla Ybs 211 -223 – Dolomite ¹

1045 Ma. The strike of crystallization foliations is fairly uniform throughout most of the map area, but locally 67 ¹ A shale. Lower sequence is medium-light- to medium-gray-weathering, medium-gray, fine- to tite. Unit commonly contains thin mafic layers or schlieren having the composition of Volkert, R.A., Monteverde, D.H., and Drake, A.A., Jr., 1989, Bedrock geologic map of the

Ymr 84 56

¹ ¹

is varied because of deformation of the rocks by folding. They strike mainly northeast at an average of N ¹ 24 medium-grained, thin- to medium-bedded dolomite. Quartz-sand lenses occur near lower amphibolite and leucocratic to mafic layers of quartz-oligoclase gneiss. Stanhope quadrangle, Sussex and Morris Counties, New Jersey: U.S. Geological ¹ * Table modified from Volkert and others, (1990). Wells logged by F.J. ¹ ¹ 50 Ybh

12 A 50

¹ 78

46°E (fig.4) and dip predominantly southeast, and less commonly northwest, at 9° to 90° and average 57°. Ylo 62 ¹ gradational contact with Hardyston Quartzite. Archaeocyathids of Early Cambrian age are Survey, Geologic Quadrangle Map GQ-1671, scale 1:24,000. Markewicz.

Yb Yd Ylo 85 U ¹

32 70 50 ¹

9 ¹ 60 Yba

¹ ¹ 72 present in formation at Franklin, New Jersey, suggesting an intraformational disconformity Locally, in the hinge areas of major folds, foliations strike northwest and dip gently to moderately northeast. Ylo ¹ ¹ Other Rocks Volkert, R.A., Monteverde, D.H., and Drake, A.A., Jr., 1994, Bedrock geologic map of the

¹

¹ 60 D 74 ¹ 68 53 Ymag Yba ¹ 40 o 52'30'' 44 Flemington between Middle and Early Cambrian time (Palmer and Rozanov, 1967). Unit also contains Microantiperthite granite (Mesoproterozoic) – Tan- to buff-weathering, light-green- Hackettstown quadrangle, Morris, Warren and Hunterdon Counties, New Jersey: New Yb 32 72 A' Ymag o 74 o Yb Tewksbury fault (WEEHAWKEN)73 40 45' 40 o 45' Hyolithellus micans (Offield, 1967; Markewicz, 1968). Approximately 800 ft. thick regionally. ish-gray, medium- to coarse-grained, massive, foliated granite composed of microanti- Jersey Geological Survey, Geologic Map Series GMS 94-1, scale 1:24,000. o 74 45' 42'30'' (GLADSTONE) 40' 74 o 37'30'' (BERNARDSVILLE) perthite to microperthite, quartz that is locally brown rust-stained, oligoclase, and Volkert, R.A., and Puffer, J.H., 1995, Late Proterozoic diabase dikes of the New Jersey Base map from U.S. Geological Survey, 1954. Photorevised 1981. Bedrock geology mapped by R.A. Volkert in 2009,1985-1987 Ch Hardyston Quartzite (Lower Cambrian) (Wolff and Brooks, 1898) – Medium- to light-gray, hornblende. Locally contains minor amounts of biotite, altered clinopyroxene, and Highlands – A remnant of Iapetan rifting in the north-central Appalachians: Digital cartography by M.W. Girard SCALE 1:24000 fine- to coarse-grained, medium- to thick-bedded quartzite, arkosic sandstone and dolomitic magnetite. Unit is tentatively interpreted to be petrogenetically related to intrusive U.S. Geological Survey Professional Paper 1565-A, 22 p. (CALIFON) Research supported by the U. S. Geological Survey, National Cooperative sandstone. Contains Scolithus linearis (?) and fragments of the trilobite Olenellus thompsoni Volkert, R.A., Zartman, R.E., and Moore, P.B., 2005, U-Pb zircon geochronology of Meso- 1 1/2 0 1 mile Geological Mapping Program, under USGS award number 99HQAG0141 rocks of the Byram and Lake Hopatcong Suites. The views and conclusions contained in this document are those of the author of Early Cambrian age (Nason, 1891; Weller, 1903). Thickness ranges from 0 ft. to a proterozoic postorogenic rocks and implications for post-Ottawan magmatism and 1000 0 1000 2000 3000 4000 5000 6000 7000 feet and should not be interpreted as necessarily representing the official maximum of 200 ft. regionally. metallogenesis, New Jersey Highlands and contiguous areas, USA: Precambrian 12 policies, either expressed or implied, of the U. S. Government. 1 1/2 0 1 kilometer Mesoproterozoic rocks, undifferentiated – Shown in cross section only. Research, v. 139, p. 1-19. 1 Retired, New Jersey Geological and Water Survey. Yu MAGNETIC TRUE NORT H Weller, Stuart, 1903, The Paleozoic faunas: New Jersey Geological Survey, Report on CONTOUR INTERVAL 20 FEET N Paleontology, v. 3, 462 p.

O CORRELATION OF MAP UNITS

RTH DATUM IS MEAN SEA LEVEL Wherry, E.T., 1909, The early Paleozoic of the Lehigh Valley district, Pennsylvania: Science,

APPROXIMATE MEAN LOCATION IN new series, v. 30, 416 p. Trpcq TRIASSIC DECLINATION, 1999 NEW JERSEY Witte, R.W., 2008, Surficial geologic map of the Chester quadrangle, Morris County, New BEDROCK GEOLOGIC MAP OF THE CHESTER QUADRANGLE Jersey: New Jersey Geological Survey, Open-File Map manuscript, scale 1:24,000. UNCONFORMITY MORRIS COUNTY, NEW JERSEY Wolff, J.E., and Brooks, A.H., 1898, The age of the Franklin white limestone of Sussex County, Sg SILURIAN New Jersey: U.S. Geological Survey 18th Annual Report, pt. 2, p. 425-456. UNCONFORMITY

KITTATINNY VALLEY JUTLAND KLIPPE by SEQUENCE Richard A. Volkert 1 SEQUENCE Obu 2018 Beekmantown Oh ORDOVICIAN Group OCbl Kittatinny Ca Supergroup Data Frequency-Azimuth Cl Data Frequency-Azimuth No. of Data = 48 Data Frequency-Azimuth CAMBRIAN No. of Data = 16 Sector angle = 10° No. of Data = 13 Ch Sector angle = 10° Scale: tick interval = 2% [1.0 data] Sector angle = 10° Scale: tick interval = 10% [1.6 data] Maximum = 12.5% [6 data] Scale: tick interval = 5% [0.7 data] UNCONFORMITY Maximum = 31.3% [5 data] Mean Resultant dir’n = 142-322 Maximum = 23.1% [3 data] Mean Resultant dir’n = 048-228 [95% Confidence interval = +32°] [95% Confidence interval = +14°] Mean Resultant dir’n = 053-233 NEW JERSEY HIGHLANDS [95% Confidence interval = +23°] Figure 1. Rose diagram of the strike of bedding in Paleozoic rocks Zd NEOPROTEROZOIC Figure 5. Rose diagram of the strike of joints in all Paleozoic rocks. A' of the Green Pond Mountain Region and Valley and Ridge. Figure 3. Rose diagram of the strike of slaty and spaced A cleavage in Paleozoic rocks from the Peapack Klippe. INTRUSIVE CONTACTS Black River fault fault Rockaway Valley Flemington fault Peapack-Ralston fault Longwood Valley fault Longwood Valley Picatinny fault Brook fault Tanners FEET FEET Byram Intrusive Suite Lake Hopatcong Intrusive Suite 2,000 2,000 Ybh Yba Ybs Ybb Ypg Ypa Yps

Ymp Ymp Ylo Ypg Trpcq Ch 1,000 INTRUSIVE CONTACTS 1,000 Yh OCbl Yk Ch Cl Yb Ch Back - Arc Basin Supracrustal Rocks Ypg Cl Cl Yb Ch Obu Yp Yb Yb Ylo Cl Ch Yb Yps Ymg Yd Yb Ybs Ylo Ca Yba Ch Yb Ylo Ymag Ypg Oh Cl SEA LEVEL Data Frequency-Azimuth Yk Ymg Yb Ymp Yp Ymr SEA LEVEL Ypa Data Frequency-Azimuth Yu Ybh Yd Yd Data Frequency-Azimuth No. of Data = 366 MESOPROTEROZOIC Yh Yu No. of Data = 265 Yb Ylo Ybh No. of Data = 11 Sector angle = 10° Ypa Ypa Ypg Yps Ylo Sector angle = 10° Losee Suite Yh ? Ylo Sector angle = 10° Scale: tick interval = 2% [7.3 data] Yu ? Yb -1,000 Scale: tick interval = 5% [13.3 data] Yh Ybh Obu Scale: tick interval = 5% [0.6 data] Maximum = 12.6% [46 data] -1,000 Ymp Maximum = 22.3% [59 data] Ybh Yp OCbl Maximum = 27.3% [3 data] Mean Resultant dir’n = 128-308 Ylo Yla Ylb Yh Yd Yu Ca Mean Resultant dir’n = 046-226 Ybh Mean Resultant dir’n = 055-235 [95% Confidence interval = +12°] Yu Ylo Yps Cl [95% Confidence interval = +5°] -2,000 [95% Confidence interval = +28°] Other Rocks -2,000 Ybh Ylo Ch Yh Yd Figure 2. Rose diagram of the strike of bedding Figure 4. Rose diagram of the strike of crystallization Figure 6. Rose diagram of the strike of joints in Mesoproterozoic rocks. Yk Yh Ymag Ylo Ymag Yp Yh Yd Ymag Ylo in Paleozoic rocks of the Peapack Klippe. foliations in Mesoproterozoic rocks. -3,000 -3,000