... , 1952 ; Bass and Northrop, 1950 ). Brill (1952) has recognized the Jacque Mountain limestone in this section. The stratigraphy of the Crested Butte Quadrangle has been described in detail by the writer (1952). Here the Pennsylvanian-Triassic rocks above the Maroon are not present and the Jacque...

... of the Elk Basin anticline, Montana–Wyoming: Fractured Reservoirs : Characterization and Modeling, Rocky Mountain Association of Geologists, Guidebook , p. 1 – 18 . Erslev E.A. 1993 , Thrusts, back-thrusts...

... suggest that an Eocene drip triggered epeirogeny in central Colorado. Relief on the lithosphere-asthenosphere boundary created by that drip seeded an Oligo-Miocene drip in the Spanish Peaks area and a Miocene drip in the Elk and West Elk Mountains. National Science Foundation (NSF) grant EAR...

... to make a further study of their structural features, but reference must be made to Eldridge’s work 5 for a description of the sedimentary formations. Eldridge mapped the Crested Butte Quadrangle, which includes Copper Creek, in the southern part of the Elk Mountains, where one of the sections...

... in a section at least 125 feet thick. Any or none of these dolomites may be the equivalent of the Day Creek dolomite of northwestern Oklahoma. The Quartermaster formation has the Doxey shale member in the middle and the Elk City sandstone member at the top. The two Pennsylvanian limestones previously mentioned...

... other indications are meager or lacking ( Peterson, 1965a ; 1965b ). Directly north of the area mapped by Chuber, in the northeast corner of the Elk Creek quadrangle, Dondanville (1958) mapped an almost identical feature. Although variation in strike of the two successions involved is only a few...

... development potential maps of the Carbon Quadrangle, Carbon County, Wyoming : U.S. Geological Survey Open-file Report 78-044, iii + 25 p., 25 plates. Texas Instruments Incorporated , 1978b , Coal resource occurrence and coal development potential maps of the Elk Mountain Quadrangle, Carbon County...

... are given elsewhere ( Kaiser, 1962 ; Koch, 1963 ). The study area is along the mountainous, densely forested, southwestern Oregon coast between Port Orford and Gold Beach, Curry County. It lies within the U. S. Geological Survey (1954) 15-minute Port Orford and Gold Beach topographic quadrangles...

... sequence is assigned to the Morrison formation, again following Baker, Dane, and Reeside (1936 , p. 27, Fig. 5, secs. 15 and 19). Fig. 2. —Jurassic columnar sections in Elk Mountains. The basal, white, Upper Jurassic sandstone sharply succeeds bright red sandstone, red siltstone, or coarse...

... that this structural feature was created through a combination of thick- and thin-skinned deformation during the contractional Laramide orogeny. Major west-directed, basement-involved faulting occurs beneath Simpson Ridge, suggesting that this structural feature is not related to the eastvergent Elk Mountain anticline...

...-called Nugget (?) sandstone along the east side of Elk Mountain from 13 to 16 miles southeast of Newcastle is massive, moderately hard, medium- to fine-grained, salmon-colored, weathers brick red, and ranges in thickness from 4 to 10 feet. It is lighter in color and harder than the the underlying...

... Major activity in the Oriskany sand gas territory of north-central Pennsylvania centered on southeastern Elk County in 1953. The Benezette part of the Benezette-Driftwood gas field was opened early in 1953 by the completion of the Charleroi Mountain Club well No. 1 (No. 15 on map, Fig. 1...

... to the Little Rocky Mountains. Its time equivalent in eastern Montana is in the shales of the lower Pierre. In the area between the Pryor and Beartooth mountains (Locality 2) the Eagle can be recognized. Hare’s section 1 in the Elk Basin field gives the thickness of the Eagle as 300 feet. In the writers...

... it is impossible to separate the Pennsylvanian and Permian rocks of this area and the detailed stratigraphy of the trough is still largely unknown. FIG. 1. —Geologic map and location map of Crested Butte Quadrangle. The northern part of the quadrangle includes part of the southwest flank of the Elk...

... for convenience in writing to divide the gas-productive areas into three fields. The Elk-Poca field is considered as that productive area beginning near the Elk River and the city of Charleston and extending northward to the north boundary of the Kenna Quadrangle. The Sandyville field is considered...

... of Glenwood Springs, northwestward to a place near the northwest corner of Sec. 19, T. 4 S., R. 92 W., on Butler Creek. The approximate position of its outcrop, as sketched by an automobile traverse of the area, is shown in Figure 1 . This unit in Sec. 15, T. 5 S., R. 91 W., on Main Elk Creek, was described...

... of Schoolhouse Member, Maroon Formation. ABA = axial basin anticline, AV = Ashley Valley, DCA = Douglas Creek arch, DHA = Danforth Hills anticline, DJ = Derby Junction, EEC = East Elk Creek, ER = Eagle River, ERC = East Rifle Creek, ES = Elk Springs, FC = Fawn Creek, FLC = Flag Creek, GHM = Grand Hogback...

... Limestone, Elk Ridge Limestone, White Quail Limestone, and Jacque Mountain Limestone. Subsequently, the term Lionshead Dolomite was adopted (unofficially) for a dolomite unit in the Minturn area about 600 feet below the Wearyman Dolomite. The term Lionshead previously was used in a somewhat broader sense...

... Elk Creek. Piedmont Quadrangle, NW¼, NW¼, sec. 7, T3N., R6E. Excellent exposures of Deadwood present to east and west of measured section along Little Elk Creek. Trilobite collections: LEC 48 (UMC 17756), LEC 51 (UMC 17757), LEC 55 (UMC 17758), LEC 57 (UMC 17759), LEC 62 (UMC 17760), LEC 70 (UMC 17761...