U.S. DEPARTMENT OF THE INTERIOR MISCELLANEOUS FIELD STUDIES MAP MF-2382 Version 1.0 U.S. GEOLOGICAL SURVEY SHEET 2 OF 3 D' D" WEST 275 mi (442 km) along the line of section or 220 mi (353 km) end point to end point EAST

San Juan Volcanic Field San Luis Valley Sangre De Cristo Raton Basin Mountains Pagosa Springs San Juan Sag COLORADO NEW MEXICO NEW MEXICO OKLAHOMA

27 29.4 mi (47.3 km) 28 10.3 mi (16.6 km) 29 63.5 mi (102 km) 30 24.5 mi (39.4 km) 31 22.5 mi (36.2 km) 32 27 mi (43.4 km) 33 26.2 mi (42.2 km) 34 Samedan Oil Corp. Meridian Oil Co. Waggoner-Baldridge Energy Jake L. Harmon Clark & Perkins Amoco Production Co. Continental Oil Co. Brooks Expl. Co. Brown Fed. No. 1-17 South Park Fed. No. 23-17 Shelly No. 1-10 Cisneros No. 1 Goemmer Land Co. No. 1 Horse Springs Canyon No. 1 No. 3 Towndrow No. 1 Sec. 17, T. 35 N., R. 1 E. Sec. 17, T. 39 N., R. 4 E. Sec. 10, T. 40 N., R. 5 E. Sec. 5, T. 27 S., R. 70 W. Sec. 11, T. 29 S., R. 67 W. Sec. 33, T. 32 S., R. 66 W. Sec. 18, T. 30 N., R. 22 E. Sec. 27, T. 31 N., R. 25 E. KB 8,564 ft KB 10,086 ft KB 8,178 ft KB 7,654 ft KB 6,839 ft KB 7,452 ft KB 7,974 ft KB 8,267 ft SP R GR R EXPLANATION Formation or member contact P resent- ? Contact that rises (uniformly or abruptly) SP R in stratigraphic position Queried where uncertain Tertiary Contact, position is uncertain day ? Unconformity Queried where uncertain erosio ? Time line Queried where uncertain Raton Formation SP Spontaneous-potential curve ? n surface GR Gamma-ray curve TERTIARY Area of fault or unconformity R Resistivity curve at base of Kirtland Shale 2 KB Kelly bushing 1 (proj) Projected position of macrofossil from nearest outcrop TERTIARY (see sheet 1 for age ranges of molluscan ) mation Borehole depths shown are in thousands of feet below altitude of Kelly CRETACEOUS bushing except for boreholes where igneous sills have been removed. Maastrichtian Vermejo For Also note that only partial logs of boreholes are shown; upper and lower parts of logs are omitted where they are not applicable to this study. Tertiary sill? 2 Sandstone dad Trini FACIES COLORS FOR CRETACEOUS ROCKS SP R Maastrichtian Kirtland-Fruitland Formations Nonmarine strata undifferentiated Baculites jenseni (proj.)

Baculites reesidei (proj.) Marine and coastal sandstone Restoration and correlation of Pictured Cliffs-Trinidad Sandstones is SP R Pictured Cliffs Sandstone based on assumed stratigraphic rising and known ”younging“ of the coastal sandstone complex to the east and northeast. Dominantly marine shale and siltstone

Undifferentiated 3 Greenhorn Limestone and Bridge Creek (Km) Tertiary rocks and Fort Hays (Kn) Limestone Members 2

1 Undivided nonmarine and marine strata (Dakota Sandstone) GR R

1 9 3 Cretaceous section between the San Juan sag and Raton Basin was removed by latest Pierre Shale FEET METERS Cretaceous-early Tertiary erosion. Contact is 1000 300 projected where line is short dashed. Campanian

Kirtland Shale?

Fault or unconformity? GR R 4 500 150 Macrofossils projected into 1 3 Niobrara part of section from outcrop data (Scott, 1986) 20-57 mi Vertical exaggeration about 160 × 2 (32-92 km) to the south. Lewis Shale 4

10 2 GR R Scaphites hippocrepis III (proj.) 10 20 30 40 KILOMETERS Scaphites hippocrepis II (proj.) Scaphites hippocrepis I (proj.) 0 0 5 10 15 20 25 MILES Undifferentiated Tertiary rocks Desmoscaphites bassleri (proj.) A few thin sills Upper Desmoscaphites erdmanni (proj.) may be present Horizontal scale excludes width of well-log column Clioscaphites choteauensis (proj.) in this interval Santonian Middle 6 Clioscaphites vermiformis (proj.) SCALE Campanian Cladoceramus undulatoplicatus (proj.) Lower

Magadiceramus subquadratus (proj.) Upper 71.5 mi (115 km) 35 ? ill Member, Kn Smoky H Niobrara Formation, Kn 5 Coniacian Kenton (Oklahoma panhandle) Protexanites bourgeoisianus (proj.) 2 4 Cremnoceramus browni (proj.) Middle Sec. 18, T. 5 N., R. 2 E. Cremnoceramus deformis (proj.) 142 ft thick sill removed 3 Cremnoceramus erectus (proj.) Lower Prionocyclus germari (proj.) Mytiloides incertus (proj.) 3 11 5 ? Turonian Present-day erosion surface ? ember, Kn Fort Hays Limestone M 1 2 Greenhorn Limestone (Kgh) c gh 3 Eastward projection ber, K Carlile Shale, Kc ber, K Mem Mem Cenomanian 4 of top of Mesaverde Sandstone estone ? Codell c k Lim 5 ber, K Cree , Kgh Romeroville Sandstone Graneros Shale Group is at 2400 ft depth ill Mem ridge mber Blue H B Me Kgh c mestone ber, 6 Member, K ln Li em Mesa Rica Sandstone Pajarito Formation Fairport Greenhorn Limestone, Kgh Linco Shale M rtland Ha ? Albian Glencairn Formation 7 Graneros Shale ? 7 ? Lytle Formation Morrison Formation Upper Long Canyon Sandstone Bed Dakota Sandstone ssic) Transgressive surface of erosion Jura Sequence boundaries of Glencairn Formation Mancos Shale (Km) (Upper ormation 1. Mytiloides mytiloides (proj.) F 2. Inoceramus pictus (proj.) Morrison 6 3. Inoceramus prefragilis (proj.) Codell Sandstone 4. Ostrea beloiti (proj.) 3 Member, Kc 5. Conlinoceras tarrantense (proj.) 6. Peilinia cf. quadriplicata (proj.) o o o o o o o o 7. 4 Series Stage rock unit lithology fauna 110 109 108 107 106 105 104 103 Peilinia cf. quadriplicata (proj.) 38o Sa Inoceramus comancheanus (proj.) Niobrara Fm. D 10771 - Cremnoceramus waltersdorfensis n g Texigryphaea tucumcarii (proj.) Monticello re Unnamed La Junta Eopachydiscus marcianus (proj.) mbr. De alent = Point where thickness of D 10790 - Scaphites whitfieldi S 29 San Luis trinodosum (proj.) v a 30 ui C q D 10786 - Inoceramus dimidius, Scaphites warreni, S 28 n J Walsenburg Tertiary sill was removed Prionocyclus wyomingensis a Valley risto M n u tion e J a Del Norte a 13 from above log Vol u D 10788 - Lopha lugubris, Inoceramus dimidius, a n

Member c n S Form Prionocyclus wyomingensis Cortez Pagosa anic F 31 Raton Santonian M a ount a Juana Lopez Bluff ar D 10766, D 10789 - Lopha lugubris, Coilopoceras Durango Springs ount g Alamosa Above biostratigraphic data projected from br n. sp., io Prionocyclus macombi, ie Dobrovol ny and others (1947), Scott (1986), a Trinidad N l a Hourcquia sp. A ins ins

Codell 26 d Ss. Mbr. 27 ABBREVIATIONS FOR D 10740 - Coilopoceras springeri, Prionocyclus rc 32 Cobban (1987), and Lucas and Kisucky (1988). o UTA hul Basin D'' STRATIGRAPHIC UNITS hyatti, Romaniceras mexicanum 37 H COLORADO D' COLORADO et 35 Km ARIZONA NEW M a Raton NEW MEXICO X , EXICO 25 A ber Km Mancos Shale Kayenta A M m rc 34 O e H M Shiprock 24 h 33 Coniacian z Kn Niobrara Formation Carlile Shale LA 8 Farmington K Lope Km , Km Turonian Clayton O a r, r m ft 23 n b b Kc Carlile Shale 10 a M 30 Taos TEXAS Ju s M Blue Hill Member L Sh Kgh Greenhorn Limestone Springer nd 20 22 San Juan Taylor Springs reek a 5 artl 10 Turonian ge C H Km o d nd , 36 Cuba Bri er 00 Basin br a b stone D 10792 - Collignoniceras 21 em nd woollgari

n M M a Fairport

l Member S ssic) Thickness of 3,500 ft (1,070 m) from the top of the shale inco a ura D 10736 - Mytiloides mytiloides Sante Fe L aneros kot J Dakota Sandstone to the top of the Trinidad 19 X 20 Las Vegas 4 Da calcareous shale Gallup X

Gr Bridge

= Point where thickness of Sandstone in the Raton Basin versus a thickness Member X18 pper Creek Ls. D 10735 - Metoicoceras 17X

U Upper Cretaceous ? ( Tertiary sill was removed of about 5,000 ft (1,500 m) from the top of the Dakota Z X16 Z geslinianum silty shale uni uni tion X15 tion from above log. Thickness Sandstone to the top of the Pictured Cliffs Sandstone U Tucumcari X14 p Cenomanian limestone lif Grants orma of strata between depths of in the San Juan Basin (which involved less time) 13X t orma F o F D 10787 - Inoceramus sp., 35 X ) 1,100 and 1,300 ft has been indicates that subsidence rates in the San Juan Desmoceras sp. 12 B (? calcarenite a Albuquerque reduced due to removal of sills. Basin area were about 1.5 times those of the Raton 11X sin yon Morrison Holbrook n Basin area (both basins developed in early Tertiary time). sandstone Ca bentonite urro 8 X 10

Greenhorn Limestone 4 Albian-Aptian? B unconformity D X X 9 Hartland Shale Member D 5848 X Cenomanian Show Low USGS Mesozoic X X EXPLANATION locality number 1 5 7 Mo X X 3 XX Outcrop section Borehole gollon R2 6 Lincoln D 5848, D 10734 - Inoceramus prefragilis, Socorro o im Springerville Upper Jurassic Ls. Mbr. Tarrantoceras sp. 34 0 50 100 Miles Graneros D 10733 - Ostrea beloiti Shale 0 50 100 150 Kilometers Stratigraphic position of macrofossils in a composite outcrop section of upper part of Graneros Shale through lower part of Fort Hays INDEX MAP SHOWING LOCATION OF CROSS SECTIONS Limestone Member of Niobrara Formation exposed in the Taylor Springs area, 36 mi (58 km) south of cross section and about 6 mi (9.8 km) east-southeast of Springer- see Index Map. Modified from Cobban and Hook (1984).

SECTION D'-D'', PAGOSA SPRINGS, COLORADO, TO THE OKLAHOMA PANHANDLE Manuscript approved for publication November 1, 2001 Any use of trade names in this publication is for descriptive purposes only and does not imply REGIONAL STRATIGRAPHIC CROSS SECTIONS OF CRETACEOUS ROCKS FROM EAST-CENTRAL ARIZONA TO THE OKLAHOMA PANHANDLE endorsement by the U.S. Geological Survey

By This map was produced on request, directly from digital files, on an electronic plotter

C.M. Molenaar, W.A. Cobban, E.A. Merewether, C.L. Pillmore, D.G. Wolfe, and J.M. Holbrook For sale by U.S. Geological Survey Information Services Box 25286, Federal Center, Denver, CO 80225 2002 1-888-ASK-USGS