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N WY ST E GE LO IC L SO IA ION 32nd ANNUAL MEETING. HAMILTON COLLEGE CLINTON, NEW YORK MAY, 1960 GUIDEBOOK FOR FIELD TRIPS 32nd Annual Meeting of the NEW YORK STATE GEOLOGICAL ASSOCIATION prepared by David Hawley and Donald B. Potter HAMILTON COLLEGE Clinton, New York May 13-14, 1960 CONTENTS Page Stratigraphic colmnn. • • • • • • • • • • • • • • • i Location map, field trip stops • • • • • • • • • • • iv Geologic sketch map, Utica-Little Falls area • • opp. A-1 Section A - Frankfort Gulph General description, Trip A. • • • • • • • • • A-1 Road log, Trip A••••••• • ••••••• • A-3 Section B - Clinton hematite mine General description, Trip B. • • • • • • • • • B-1 Section C - Precambrian Geologic map of Adirondack Mountains (Fig. C-1) opp. C-1 Summary of Precambrian geology of Adirondacks• C-1 Geologic map, Remsen, Ohio, & Piseco Lake quadrangles •••••••••••• • • opp. C-5 General description, Trip C •••••••••• C-5 Road log, Trip c, group A ••••••••••• C-10 Road log, Trip C, group B ••••••••••• C-22 References tor Section c •••••••••••• C-28 Sources for geologic map of Adirondacks •••• c-29 Section D - Little Falls area to Trenton Gorge General description, Trip D ••••••••• • D-1 Summary •'Jf geology of Little Falls quadrangle, by James R. Dunn ••••••••••••• D-5 Road log, Trip D. • • • ••••••••••• • D-9 Geologic Map of New York State (courtesy of the Sta.te Geological Survey) 1 STRATIGRAPHIC COLU1ili - UTICA AND LITTLE FALLS QUADRANGI.ES SYSTEM SERIES Group FORMATION Character of rocks Thickness in feet Member SILURIAN CAYUGAN Salina CAMILLUS 100-300 1 Mottled reddish and yellowish green, and drab colored cal careous shale with flaggy dolomite beds. VER.NON 16o-340' Red crumbly shale with green layers and spots, and a green zone at base. disconformity ••••••••••••••••• NIAGARAN Lockport ILION 60 1 Gray-black dolomitic shale with interbedded dolomite beds, some of which contain stromatoporoids. Clinton HERKIMER Bo' rnterbedded gray sandy dolomite, dolomitic sandstone, and shale. with a 3-foot hematitic, sandy, fossiliferous,dolomitic calcareous ledge at base. WILLOWVALE 32' Green, thin-bedded shale with interbeds of fine-grained calcareous sandstone. At base is a 2½-foot bed of red, oolitic hematite. SAUQUOIT 16o-2QQ I Interbedded sandstone and shale with thin conglomerate beds. Cross-bedding is common. ONEIDA 25-30 I Quartz-pebble conglomerate and sandstone, in massive beds. Four to six inches of conglomer ate at base is richly impregnated 11 with pyrite. Top is grada tional into overlying Sauquoit. disconformity. • • • • • • • • • • • • • • • • ORDOVICIAN CINCINNATIAN Eden FRANKFORT Moyer 400 1 Gray, silty to aretaceous shale, with beds of sandstone. Hasenclever 50' Finely cross-laminated, thin bedded fine sandstone and inte!\. bedded greenish shale. Harter 100 I Greenish-gray laminated shale which grades into black shale of the Utica, below. CHAMPLAINIAN Trenton UTICA 400-700 1 Finely laminated black shale. diaconformity ••••••••••••••••• COBOURG Steuben 60 1 Thick-bedded, cross-laminated calcarenite. Rust 115' Mostly thin limestone beds with intercalated calcareous shale. DENMARK Russia 70' Black, bituminous, impure lime stone with irregular shale inter beds. The upper 12 1 is calcareous mudstone and brown-weathering calcareous argillite. Poland 60' Interbedded gray-black limestone and calcareous shale. SHOREHAM Rathbun 9' Interbeds of coquina-calcarenite, calc1lut1te, and calcareous shale. lower Shoreham 35-45' Thin-bedded limestone inter- bedded with calcareous shale. 111 KIRKFIELD 4-45' Thin-bedded limestone interbedded with· calcareous shale. Thick calcarenite beds at top. ROCKLAND 0-13 1 Black, dark-weathering, some what cherty limestone, with shale partings toward the south east. Missing near boundary between quadrangles. disconfcrrnity. • • • • • • • • • • • • • • • • Black River LOWVILLE 26-40' Upper part is light-gray weathering, medium gray calcilutite. Lower part is gray-brown, heavy-ledged, sandy and muddy limestone. disconformity ••••••••••••• • • • 0 CANADIAN TRIBES HILL 0-45 1 Limestone arrl dolomite, commonly muddy and sandy. disconformity •• • • • • • • • • • • • 0 • • • CAMBRIAN CRO.IXIAN LITTLE FALLS Up to 450 1 Dolomite, sandy dolomite, and dolomitic sandstone. Conglomer ate at base. unconformity. • • • • • • • • • • • • • • • • 0 PRECAMBRIAN (General sequence ror southern Adirondacks) Hornblende-granite gneiss and biotite granite gneiss (major deformation and metamorphism) Pyroxene-quartz-syenite gneiss Anorthosite-gabbro Grenville metasediments, including marble, paragneiss, quartzite, and amphioo11te (some may be metagabbro or metavolcanic). <BJ ca> ~la P/seco Lake •-,< <..J i.e/~e, "'\ e, i . ~(, L OC4 f/017 o/' .5 la13.s 011 ~\ <03) Tr,j,.s A, C, and D 0 5 IO M.-les I.At ~ N ~ - C/,,,fon ~ miles @ ~ ·• ..... ······ .. GEOLOGIC SKETCH MAP Ou. ··•... P€ Ole ········ ........ 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Of ...... .. e,;... .... ..-., ~............. --..... •: -~......... i Sc '••• ... ....... 19•1• UTICA QUADRANGLE (AFTER KAY, 1953) LITTLE FALLS QUADRANGLE (AFTER CUSHING, 1905) A-1 TRIP A - FRAiHCFORT GULPH SILURIAN SECTION Purpose: The trip visits exposures of the Frankfort Oneida disconformity, the overlying Clinton group, and the Vernon shale. These are the best exposures of the Clinton group in the type area. Acknowledgments: The itinerary was ~uggested, ani the localities described in Marshall Kay's "Geology of the Utica Quadrane;le, 11 1953, New York State !".!Useum Bulletin #347. General: The unconformity at the base of the Oneida conglomerate is a reflection of the Taconian orogeny 1n New England. Most of the upper Ordovician and all of the lower Silurian are missing in this time gap. The over- lying formations reflect a shoreline encroaching from west to east across New York State. The peculiar environment of deposition of the Clinton iron ores is discussed in section B of this guidebook. The Vernon shale, lowest member of the Salina group, represents the mud flats of a great delta built out from the east, which was intermittently encroached upon by hyper-saline seas from the west (Fisher, 1957). The ex tension of seas eastward. across the state during Silurian time accompanied the erosional reduction of the Taconian mountains in New England. Selected References: Dale, Nelson a., 1953, Geology and Mineral Resources of the Oriskany Quadrangle (Rome Quadrangle): N. Y. State Mus. Bull. 345. Fisher, Donald w., 1957, Lithology, Paleoecology, ani Paleontology of the Vernon Shale (Late Silurian) in the Type Area: N. Y. State Mus. Bull. 364. , 1960, Correlation of the Silurian rocks in ----New York State: N. Y. State Mus. & Sci. Service, Geol. Sur. Map and Chart Series #1.