DOCSLIB.ORG

A Summary of the Coal Deposits in the Colorado Plateau: Arizona, Colorado, New Mexico, and Utah

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
A Summary of the Coal Deposits in the Colorado Plateau: Arizona, Colorado, New Mexico, and Utah Chapter B National Coal Resource A Summary of the Coal Deposits Assessment in the Colorado Plateau: Arizona, Colorado, New Mexico, and Utah Click here to return to Disc 1 By Mark A. Kirschbaum1 and Laura R.H. Biewick1 Volume Table of Contents Chapter B of Geologic Assessment of Coal in the Colorado Plateau: Arizona, Colorado, New Mexico, and Utah Edited by M.A. Kirschbaum, L.N.R. Roberts, and L.R.H. Biewick U.S. Geological Survey Professional Paper 1625–B* 1 U.S. Geological Survey, Denver, Colorado 80225 * This report, although in the USGS Professional Paper series, is available only on CD-ROM and is not available separately U.S. Department of the Interior U.S. Geological Survey Contents Introduction .................................................................................................................................................B1 Acknowledgments........................................................................................................................................ 1 Coal-Field Summaries .................................................................................................................................. 3 Arizona................................................................................................................................................... 3 Black Mesa Coal Field ............................................................................................................... 3 Pinedale Coal Field ..................................................................................................................... 6 Colorado ................................................................................................................................................ 8 Book Cliffs Coal Field.................................................................................................................. 8 Carbondale Coal Field .............................................................................................................. 10 Crested Butte Coal Field .......................................................................................................... 12 Danforth Hills Coal Field .......................................................................................................... 14 Durango–Pagosa Springs Coal Field..................................................................................... 16 Grand Hogback Coal Field....................................................................................................... 18 Grand Mesa Coal Field............................................................................................................. 20 Lower White River Coal Field.................................................................................................. 22 Nucla-Naturita Coal Field........................................................................................................ 24 Somerset Coal Field.................................................................................................................. 26 Tongue Mesa Coal Field........................................................................................................... 28 Yampa Coal Field....................................................................................................................... 30 New Mexico ....................................................................................................................................... 33 Barker Creek Coal Field ........................................................................................................... 33 Bisti Coal Field........................................................................................................................... 35 Chaco Canyon Coal Field.........................................................................................................37 Chacra Mesa Coal Field........................................................................................................... 39 Crownpoint Coal Field .............................................................................................................. 41 Datil Mountains Coal Field ......................................................................................................43 Fruitland Coal Field ................................................................................................................... 45 Gallup Coal Field ....................................................................................................................... 47 Hogback Coal Field................................................................................................................... 49 La Ventana Coal Field............................................................................................................... 51 Monero Coal Field..................................................................................................................... 53 Mount Taylor Coal Field ........................................................................................................... 55 Navajo Coal Field ...................................................................................................................... 57 Newcomb-Toadlena Coal Field............................................................................................... 59 Rio Puerco Coal Field ............................................................................................................... 61 Salt Lake Coal Field .................................................................................................................. 63 San Mateo Coal Field ............................................................................................................... 65 Standing Rock Coal Field......................................................................................................... 67 Star Lake Coal Field.................................................................................................................. 69 Tierra Amarilla Coal Field ........................................................................................................ 71 Zuni Coal Field ........................................................................................................................... 73 Utah...................................................................................................................................................... 75 Alton Coal Field ......................................................................................................................... 75 Book Cliffs Coal Field................................................................................................................ 77 Emery Coal Field........................................................................................................................ 79 Henry Mountains Coal Field.................................................................................................... 81 Kaiparowits Plateau ................................................................................................................. 84 Kolob-Harmony Coal Fields..................................................................................................... 86 Salina Canyon Coal Field ......................................................................................................... 88 Sego Coal Field.......................................................................................................................... 90 Tabby Mountain Coal Field...................................................................................................... 92 Vernal Coal Field ....................................................................................................................... 94 Wales Coal Field........................................................................................................................ 96 Wasatch Plateau Coal Field.................................................................................................... 98 Figure 1. Map showing location of study area and selected coal fields within Arizona, Colorado, New Mexico, and Utah............................................................................................B2 A Summary of the Coal Deposits in the Colorado Plateau: Arizona, Colorado, New Mexico, and Utah By Mark A. Kirschbaum and Laura R.H. Biewick Introduction This report provides an overview of the geologic setting, distribution, and quality of coal deposits of the Colorado Plateau. The Colorado Plateau contains more than 40 individual coal fi elds within the four-State region of Arizona, Colorado, New Mexico, and Utah (fi g. 1). This chapter summarizes data for 47 coal fi elds of the Colorado Plateau and provides basic information on the location, general geology, coal resources and quality, and what we consider the most useful references for these areas. Each summary is essentially an annotated bibliography of the coal fi eld. The coal fi elds can be accessed individually by scrolling through the text, by selecting from the bookmarks provided in Acrobat Reader 4.0 or higher, or by clicking on the appropriate heading in the chapter B table of contents. The summaries can also be accessed from the Colorado Plateau ArcView project, which resides on both disc 1 and disc 2 of this 2-CD-ROM set (the ArcView project on disc 1 may be queried by means of ArcView Data Publisher; the ArcView project on disc 2 provides for full
Load more

Recommended publications
  • Emerging Oil and Gas Development in Northwestern New Mexico HORIZONTAL GALLUP / MANCOS PLAY
    Emerging Oil and Gas Development in Northwestern New Mexico HORIZONTAL GALLUP / MANCOS PLAY Gallup / Mancos Oil Play Northwestern New Mexico Bob Just, Petroleum Geologist, Ron Lloyd, Petroleum Geologist Robert Anderson, Branch Chief / Petroleum Geophysicist Assistant Secretary – Indian Affairs, Division of Energy and Mineral Development Introduction of the EnCana well have had cumulative production ranging from around 7,800 to 21,000 barrels of oil A new oil exploration play is beginning to develop and 114 million to 345 million cubic feet of gas. These in Sandoval and San Juan Counties, New Mexico. A production values are relatively poor except that Calgary based company (with offices in Denver, CO), water production is low, ranging from 1,000 to 3,400 Encana Oil and Gas (Encana) has recently horizontally barrels cumulative. It appears the horizontal portion drilled and produced oil from the Cretaceous age of the EnCana well is in the same zone as the older Gallup sandstone. These wells offset unleased Navajo vertical wells. allotted lands and it is anticipated that Encana and other oil and gas companies will be very interested in leasing Navajo allotment tracts as soon as possible. Early Play Development and Reported Results One of Encana’s wells, the Lybrook #H36-2307 (located in se se 32-23n- 7w, Figure 1) was reported flowing at a rate of 838 mcfgpd (natural gas) and 786 bopd (oil) from a lateral leg in the Gallup sandstone formation. Daily production through the initial 30-day period was around 440 barrels of oil per day. This well is a horizontal well with a 4,100 foot lateral section.
    [Show full text]
  • Historical Information H.4 Pre-Event Reports Book 1 Project Rulison: Pre
    Historical Information H.4 Pre-Event Reports Book 1 Project Rulison: Pre-Shot Predictions of Structural Effects HPR .2 DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. PROJECT RULISON: Pre - Shot Predictions of Structural Effects John A. -~lume& Associates Research Division San ~rancisco,California March 1969 Prepared under Contract AT(26-1)-99 for the Nevada Operations Office, USAEC This page intentionally left blank PROJECT RULISON: PRE-SHOT PREDICTIONS OF STRUCTURAL EFFECTS CONTENTS -Page ABSTRACT ......................../'. .... i i I SUMMARY ............................ v INTRODUCTION.......................... 1 SEISMICITY ........................... 2 STRUCTURAL HAZARD EVALUATION .................. 3 EARTH STRUCTURAL HAZARDS .................... 11 HYDRAULIC STRUCTURE AND WATER SUPPLY HAZARDS .......... 17 SAFETY PRECAUTIONS AND EVACUATION RECOMt4ENDATIONS ....... 22 DAMAGE COST PREDICTIONS .................... 24 CONDITION SURVEYS ....................... 26 MAP (In pocket inside back cover) This page intentionally left blank . ~ ABSTRACT This report includes results of pre-RULISON structural response investigations and a preliminary evaluation of hazards associated with ground motion effects on buildings, reservoirs, and earth structures. Total damage repair costs from an engineering judg- ment prediction are provided. Spectral Matrix Method calcula- tions are now in progress. Also included are general safety recommendations. A summary of predictions follows: Structural Response Damaging motions are probable in the region inside 25 kilometers. Structural hazards exist in Grand Valley, at the Anvil Points Research Station, and at various small ranches out to a distance of 14 ki lometers from Ground Zero (GZ) . The area is much more densely populated than would appear from initial project informa- tion. Earth Structure Hazards Rockfall and hazards to slope stability create major problems.
    [Show full text]
  • Richard Dallin Westwood: Sheriff and Ferryman of Early Grand County
    Richard Dallin Westwood: Sheriff and Ferryman of Early Grand County BY JEAN M. WESTWOOD ON FEBRUARY I7, I889, RICHARD DALLIN WESTWOOD, twenty-six years old, left Mount Pleasant, Utah, bound for Moab, a settlement in the far eastern edge of what was then Emery County. He was looking for a piece of farm land on which he could build a home for himself, his young wife, Martha, and their baby daughter, Mary Ellen. It was just ten years since the first permanent settlers had moved into "Spanish Valley" by the Grand (Colorado) River in the southeast part of the territory. The valley had long been part of western history. Mrs. Westwood lives in Scottsdale, Arizona. Above: Richard Dallin Westwood, ca. 1888. All photographs accompanying this article are courtesy of the author. Richard Dallin Westwood 67 Indian "writings" are still found on the rocks. Manos, metates, arrow­ heads, stone weapons, and ancient bean, maize, and squash seeds have all been frequent finds throughout the area, attesting to early Indian cultures. The Spanish Trail through here was used first by the early Span­ iards as a route from New Mexico to California.^ Later it was used in part by Mexican traders, trappers, prospectors, and various Indian tribes. The first party traveling the entire trail apparently was led by WiUiam WolfskiU and George C. Young in the winter of 1830-31.2 In 1854 Brigham Young sent a small expedition under William D. Huntington to trade with the Navajos and explore the southern part of Utah territory. They used this route. The next year Young called forty- one men under Alfred N.
    [Show full text]
  • Curriculum Vita - Stephen J
    Curriculum Vita - Stephen J. Reynolds School of Earth and Space Exploration, Arizona State University, Tempe, Arizona 85287-1404 (480) 965-9049 (work) Website: http://reynolds.asu.edu email: [email protected] Degrees/Registration University of Texas, El Paso: B.S., Geology, 1974 University of Arizona: M.S., Geosciences, 1977, Ph.D., Geosciences,1982 Arizona Registered Geologist #26773 (1993-present) Recent Professional Experience Arizona State University, Dept. of Geology: Professor (6/97 to present), Associate Professor (8/91 to 6/97). Teaching responsibilities include Advanced Geologic Field Mapping, Advanced Structural Geology, Applied Arizona Geology, Cordilleran Regional Geology, Geology of Arizona, Geotectonics, Introductory Geology, Orogenic Systems, Summer Field Geology, Methods of Geoscience Teaching ASU Center for Research on Education in Science, Mathematics, Engineering, and Technology, Associate Director (6/99 to present); chairman of founding committee. Arizona Geological Survey and Arizona Bureau of Geology and Mineral Technology: Research Geologist (6/88 to 7/91), Associate Research Geologist (6/87 to 6/88); Assistant Research Geologist (2/81 to 6/87). University of Arizona, Dept. of Geosciences: Visiting Associate Professor, (1991 to ~1997); Adjunct Associate Research Scientist (1987 to 1991); Research Associate and Assistant (1/75 to 12/80); Teaching Assistant (8/74 to 7/75) Geologist and Consulting Geologist: Clients include Animas Resources (2007 to present), Pediment Exploration, Ltd. (2007 to present), Clear Creek
    [Show full text]
  • Ron Blakey, Publications (Does Not Include Abstracts)
    Ron Blakey, Publications (does not include abstracts) The publications listed below were mainly produced during my tenure as a member of the Geology Department at Northern Arizona University. Those after 2009 represent ongoing research as Professor Emeritus. (PDF) – A PDF is available for this paper. Send me an email and I'll attach to return email Blakey, R.C., 1973, Stratigraphy and origin of the Moenkopi Formation of southeastern Utah: Mountain Geologist, vol. 10, no. 1, p. 1 17. Blakey, R.C., 1974, Stratigraphic and depositional analysis of the Moenkopi Formation, Southeastern Utah: Utah Geological Survey Bulletin 104, 81 p. Blakey, R.C., 1977, Petroliferous lithosomes in the Moenkopi Formation, Southern Utah: Utah Geology, vol. 4, no. 2, p. 67 84. Blakey, R.C., 1979, Oil impregnated carbonate rocks of the Timpoweap Member Moenkopi Formation, Hurricane Cliffs area, Utah and Arizona: Utah Geology, vol. 6, no. 1, p. 45 54. Blakey, R.C., 1979, Stratigraphy of the Supai Group (Pennsylvanian Permian), Mogollon Rim, Arizona: in Carboniferous Stratigraphy of the Grand Canyon Country, northern Arizona and southern Nevada, Field Trip No. 13, Ninth International Congress of Carboniferous Stratigraphy and Geology, p. 89 109. Blakey, R.C., 1979, Lower Permian stratigraphy of the southern Colorado Plateau: in Four Corners Geological Society, Guidebook to the Permian of the Colorado Plateau, p. 115 129. (PDF) Blakey, R.C., 1980, Pennsylvanian and Early Permian paleogeography, southern Colorado Plateau and vicinity: in Paleozoic Paleogeography of west central United States, Rocky Mountain Section, Society of Economic Paleontologists and Mineralogists, p. 239 258. Blakey, R.C., Peterson, F., Caputo, M.V., Geesaman, R., and Voorhees, B., 1983, Paleogeography of Middle Jurassic continental, shoreline, and shallow marine sedimentation, southern Utah: Mesozoic PaleogeogÂraphy of west central United States, Rocky Mountain Section of Society of Economic Paleontologists and Mineralogists (Symposium), p.
    [Show full text]
  • High-Resolution Correlation of the Upper Cretaceous Stratigraphy Between the Book Cliffs and the Western Henry Mountains Syncline, Utah, U.S.A
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Dissertations & Theses in Earth and Atmospheric Earth and Atmospheric Sciences, Department of Sciences 5-2012 HIGH-RESOLUTION CORRELATION OF THE UPPER CRETACEOUS STRATIGRAPHY BETWEEN THE BOOK CLIFFS AND THE WESTERN HENRY MOUNTAINS SYNCLINE, UTAH, U.S.A. Drew L. Seymour University of Nebraska, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/geoscidiss Part of the Geology Commons, Sedimentology Commons, and the Stratigraphy Commons Seymour, Drew L., "HIGH-RESOLUTION CORRELATION OF THE UPPER CRETACEOUS STRATIGRAPHY BETWEEN THE BOOK CLIFFS AND THE WESTERN HENRY MOUNTAINS SYNCLINE, UTAH, U.S.A." (2012). Dissertations & Theses in Earth and Atmospheric Sciences. 88. http://digitalcommons.unl.edu/geoscidiss/88 This Article is brought to you for free and open access by the Earth and Atmospheric Sciences, Department of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Dissertations & Theses in Earth and Atmospheric Sciences by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. HIGH-RESOLUTION CORRELATION OF THE UPPER CRETACEOUS STRATIGRAPHY BETWEEN THE BOOK CLIFFS AND THE WESTERN HENRY MOUNTAINS SYNCLINE, UTAH, U.S.A. By Drew L. Seymour A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For Degree of Master of Science Major: Earth and Atmospheric Sciences Under the Supervision of Professor Christopher R. Fielding Lincoln, NE May, 2012 HIGH-RESOLUTION CORRELATION OF THE UPPER CRETACEOUS STRATIGRAPHY BETWEEN THE BOOK CLIFFS AND THE WESTERN HENRY MOUNTAINS SYNCLINE, UTAH. U.S.A. Drew L. Seymour, M.S.
    [Show full text]
  • Scoping Report: Grand Staircase-Escalante National
    CONTENTS 1 Introduction .............................................................................................................................................. 1 2 Scoping Process ....................................................................................................................................... 3 2.1 Purpose of Scoping ........................................................................................................................... 3 2.2 Scoping Outreach .............................................................................................................................. 3 2.2.1 Publication of the Notice of Intent ....................................................................................... 3 2.2.2 Other Outreach Methods ....................................................................................................... 3 2.3 Opportunities for Public Comment ................................................................................................ 3 2.4 Public Scoping Meetings .................................................................................................................. 4 2.5 Cooperating Agency Involvement ................................................................................................... 4 2.6 National Historic Preservation Act and Tribal Consultation ....................................................... 5 3 Submission Processing and Comment Coding .................................................................................... 5
    [Show full text]
  • 26 Petroleum Geology of the Basal Niobrara Sandstone
    PETROLEUM GEOLOGY OF THE BASAL NIOBRARA SANDSTONE WEST PUERTO CHIQUITO FIELD RIO ARRIBA COUNTY NEW MEXICO USA By Thomas A. Arthur 26 A thesis submitted to the Faculty and the Board of Trustees of the Colorado School of Mines in partial fulfillment of the requirements for the degree of Master of Science (Geology). Golden, Colorado Date____________ Signed: Thomas A. Arthur Signed: Dr. Stephen A. Sonnenberg Thesis Advisor Golden, Colorado Date ____________ Signed: Dr. John D. Humphrey, Department Head Department of Geology and Geological Engineering ii ABSTRACT The basal Niobrara sandstone in the eastern San Juan Basin is an important oil producing reservoir. The West Puerto Chiquito (WPC) Field has produced approximately 18 million barrels of oil from Fort Hays age equivalent sandstones. Most of the Late Cretaceous oil producing stratigraphic traps that have been identified in the Rocky Mountain region are associated with unconformities. The boundary between the Carlile Shale and Niobrara is a well- known regional unconformity that has been extensively studied on the west side of the San Juan Basin in association with large oil fields such as Bisti and Horseshoe. A study of well log correlation, outcrop, core and source rock analysis was conducted in order to identify the resource potential of the Niobrara sandstone in the eastern part of the San Juan Basin. The Niobrara Sandstone is encased within 2000 feet of organic-rich, thermally mature Mancos source rock. Core analyses, including petrographic thin sections help to characterize the porosity and permeability of this tight reservoir. Surface lineaments were studied in order to identify reservoir connectivity.
    [Show full text]
  • Terrestrial Vertebrate Fauna of the Kaiparowits Basin
    Great Basin Naturalist Volume 40 Number 4 Article 2 12-31-1980 Terrestrial vertebrate fauna of the Kaiparowits Basin N. Duane Atwood U.S. Forest Service, Provo, Utah Clyde L. Pritchett Brigham Young University Richard D. Porter U.S. Fish and Wildlife Service, Provo, Utah Benjamin W. Wood Brigham Young University Follow this and additional works at: https://scholarsarchive.byu.edu/gbn Recommended Citation Atwood, N. Duane; Pritchett, Clyde L.; Porter, Richard D.; and Wood, Benjamin W. (1980) "Terrestrial vertebrate fauna of the Kaiparowits Basin," Great Basin Naturalist: Vol. 40 : No. 4 , Article 2. Available at: https://scholarsarchive.byu.edu/gbn/vol40/iss4/2 This Article is brought to you for free and open access by the Western North American Naturalist Publications at BYU ScholarsArchive. It has been accepted for inclusion in Great Basin Naturalist by an authorized editor of BYU ScholarsArchive. For more information, please contact [email protected], [email protected]. TERRESTRIAL VERTEBRATE FAUNA OF THE KAIPAROWITS BASIN N. Diiane Atwood', Clyde L. Pritchctt', Richard D. Porter', and Benjamin W. Wood' .\bstr^ct.- This report inehides data collected during an investigation by Brighani Young University personnel to 1976, as well as a literature from 1971 review. The fauna of the Kaiparowits Basin is represented by 7 species of salamander, toads, mnphihians (1 5 and 1 tree frog), 29 species of reptiles (1 turtle, 16 lizards, and 12 snakes), 183 species of birds (plus 2 hypothetical), and 74 species of mammals. Geographic distribution of the various species within the basin are discussed. Birds are categorized according to their population and seasonal status.
    [Show full text]
  • Book Cliffs the Book Cliffs Rise As If Startled out of the Mancos Shale Desert
    !People of the Book Cliffs The Book Cliffs rise as if startled out of the Mancos Shale desert. This bright edge stretches east-west, two hundred miles between Grand Junction, Colorado and Price, Utah, stair-stepping four thousand feet up from the desert to a summit that’s cloaked in aspen, fir, and spruce. Erosion has dissected the cliffs into isolated canyons, carved by intermittent streams that all flow south toward the Colorado River. Even so, the cliffs and canyons are considered part of the !Uinta Basin because their rock layers, like the Green River Formation, are tilted north. Pockets of true wilderness still exist within the Book Cliffs. Black bear, bighorn, mule deer, and cougars are at home in these canyons. People have lived in and moved through this country for thousands of years−the Utes most recently, the Fremont before them, and the enigmatic Barrier !Canyon people with their alien pictographs staring at us as if from outer space. Wolf Bennett and his daughters came here from Colorado to see the pictographs and to clamber around the rocks of Sego Canyon. Wolf’s spent his life as a guide and values what these canyons !offer his family−opportunities to discover, a diversion from cityscapes, a sense of wonder. A mile down canyon, Bob Holloway and his two adopted children were watering fruit trees at the ranch he’d recently bought. The roof needed work. Bob and his wife wanted to get out of the rat race in Green River. That town’s population of 900 might swell if a proposed oil refinery and nuclear power plant are built.
    [Show full text]
  • Forgotten Crocodile from the Kirtland Formation, San Juan Basin, New
    posed that the narial cavities of Para- Wima1l- saurolophuswere vocal resonating chambers' Goniopholiskirtlandicus Apparently included with this material shippedto Wiman was a partial skull that lromthe Wiman describedas a new speciesof croc- forgottencrocodile odile, Goniopholis kirtlandicus. Wiman publisheda descriptionof G. kirtlandicusin Basin, 1932in the Bulletin of the GeologicalInstitute KirtlandFormation, San Juan of IJppsala. Notice of this specieshas not appearedin any Americanpublication. Klilin NewMexico (1955)presented a descriptionand illustration of the speciesin French, but essentially repeatedWiman (1932). byDonald L. Wolberg, Vertebrate Paleontologist, NewMexico Bureau of lVlinesand Mineral Resources, Socorro, NIM Localityinformation for Crocodilian bone, armor, and teeth are Goni o p holi s kir t landicus common in Late Cretaceous and Early Ter- The skeletalmaterial referred to Gonio- tiary deposits of the San Juan Basin and pholis kirtlandicus includesmost of the right elsewhere.In the Fruitland and Kirtland For- side of a skull, a squamosalfragment, and a mations of the San Juan Basin, Late Creta- portion of dorsal plate. The referral of the ceous crocodiles were important carnivores of dorsalplate probably represents an interpreta- the reconstructed stream and stream-bank tion of the proximity of the material when community (Wolberg, 1980). In the Kirtland found. Figs. I and 2, taken from Wiman Formation, a mesosuchian crocodile, Gonio- (1932),illustrate this material. pholis kirtlandicus, discovered by Charles H. Wiman(1932, p. 181)recorded the follow- Sternbergin the early 1920'sand not described ing locality data, provided by Sternberg: until 1932 by Carl Wiman, has been all but of Crocodile.Kirtland shalesa 100feet ignored since its description and referral. "Skull below the Ojo Alamo Sandstonein the blue Specimensreferred to other crocodilian genera cley.
    [Show full text]
  • Coal Fields of Northwestern Colorado and Northeastern Utah
    COAL FIELDS OF NORTHWESTERN COLORADO AND NORTHEASTERN UTAH. By HOYT S. GALE. INTRODUCTION. NATURE OF THE PRESENT INVESTIGATION. This paper is a preliminary statement of the results of work in the coal fields of northwestern Colorado and northeastern Utah during the summer of 1907.° In 1905 a preliminary reconnaissance of the Yampa coal field, of Routt County, was made.6 In the summer of 1906 similar work was extended southwestward from the Yampa field, and the Danforth Hills and Grand Hogback coal fields, of Routt, Rio Blanco, and Garfield counties, were mapped.6 The work of the past season was a continuation of that of the two preceding years, extend­ ing the area studied westward through Routt and Rio Blanco counties, Colo., and including some less extensive coal fields in^Uinta County, Utah, and southern Uinta County, Wyo. ACCESSIBILITY. At present these fields have no_ railroad connection, although surveys for several projected lines have recently been made into the region. Of these lines, the Denver, Northwestern and Pacific Railway ("Moffat road") is under active construction in .the eastern part of Routt County and bids fair to push westward not far from the lower Yampa and White River fields in the near future. An extension of the Uintah Railway has been surveyed from Dragon to Vernal, Utah, crossing the projected route of the "MofFat road" near Green River. The Union Pacific Railroad has made a preliminary survey south from Rawlins, Wyo., intending to reach the Yampa Valley in the vicinity of Craig. a A more complete report combining the results of the preceding season's work in the Danforth Hills and Grand Hogback fields with those of last season's work as outlined here, together with detailed contour maps of the whole area, will be published as a (separate bulletin of the Survey.
    [Show full text]