by U.S. G.P.O., For sale by the Books and Open-File Reports Section, U.S. Geological Survey in Washington, Denver, CO .
Written in English
Includes bibliographical references (p. 43-45).
|Statement||by William J. Hail, Jr.|
|Series||Evolution of sedimentary basins--Uinta and Piceance basins ;, ch. O, U.S. Geological Survey bulletin ;, 1787-O|
|LC Classifications||QE75 .B9 no. 1787-O, QE92.Y4 .B9 no. 1787-O|
|The Physical Object|
|Pagination||v, 45 p. :|
|Number of Pages||45|
|LC Control Number||89600310|
Geology of the lower Yellow Creek area, northwestern Colorado. Book Hail, Jr, W J. The geology and resources of the lower Yellow Creek area, an area at the northwestern margin of the Piceance Creek basin comprising of four minute quadrangles, are described. Subsurface face rocks penetrated by drill holes range in age from Pennsylvania to oc / geology of the washakie basin, sweetwater and carbon counties, wyoming, and moffat county, colorado, $ 10 oc 33 / thickness and lithology of upper ordovician and lower and middle silurian rocks in the michigan basin, on two sheets, $ 10 At the lower end of Swift Reservoir (NE 1/4 sec. 27 and SW1/4 sec. 26, T. 28 N., R. 10 W.) and other nearby areas, the thickness is reported to be feet (Imlay, ). FIGURE —Contorted shale and limestone of the Ellis group on Badger Creek near the mouth of Red Poacher Creek, Maclas Pass quadrangle, Flathead :// Granitic rocks of m.y. age group (Early Proterozoic) at surface, covers 11 % of this area. Includes Boulder Creek -M.Y. AGE GROUP (AGE M.Y.)--Includes Boulder Creek, Cross Creek, Denny Creek, Kroenke, Browns Pass, Powderhorn, Pitts Meadow, Bakers Bridge, and Tenmile Granites, Quartz Monzonites, or Granodiorites; also, unnamed granitic rocks?code=f
Contact is a gray, soft, thin-bedded sandstone (Rim Rock) with dark brown and black shale (Williams Fork). The lower boundary of Williams Fork is the top of Trout Creek sandstone. Such a bed located ft above base at Rangely. If sandstone is Trout Creek equivalent, base of WESTERN COLORADO AND NORTHWESTERN NEW MEXICO M. E. MacLACHLAN U.S. Geological Survey Denver, Colorado INTRODUCTION The stratigraphic nomenclature applied in various parts of west-ern Colorado, northwestern New Mexico, and a small part of east- central Utah is summarized in the accompanying chart (fig. 1). The The "B" groove is a lean oil-shale zone. The R-6 underlies a sq mi area and has a maximum thickness of ft in northeast part of basin (areal extent map). The lowest oil-shale zone--the Ris separated from the R-6 by the marine saline zone. The R-4 zone is in the lower one-third of the Parachute Creek :// Geology of the Yankton area, South Dakota and Nebraska, , Professional Paper Stratigraphy of Pennsylvanian and lower Permian rocks in Brown and Coleman Numbered Series/Professional Paper/
Mancos Shale (Cretaceous) at surface, covers 7 % of this area. In northwest and west-central: Intertongues complexly with units of overlying Mesaverde Group or Fm; lower part consists of a calcareous Niobrara equivalent and Frontier Sandstone and Mowry Shale Members; in areas where the Frontier and Mowry Members (Kmfm), or these and the Dakota Sandstone (Kfd) are distinguished, ?code=f A growing body of evidence suggests that continental arc lower crust and underlying mantle wedge assemblages native to the Mojave Desert (i.e., the southern California batholith) were displaced eastward during Laramide shallow-angle subduction, and reattached to the base of the Colorado Plateau Transition Zone (central Arizona) and farther :// The NMGS Fall Field Conference traveled through the Four Corners area in northwestern New Mexico. Day 1 circled the Four Corners Monument with stops in southeastern Utah, northwestern New Mexico and southwestern :// Chapter O: Geology of the lower Yellow Creek area, northwestern Colorado Chapter P: Middle Cretaceous stratigraphy on the south and east sides of the Uinta Basin, northeastern Utah and northwestern Colorado