Map Showing Geology, Structure, and Geophysics of the Central Black
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Evidence for polyphase deformation in the mylonitic zones bounding the Chester and Athens Domes, in southeastern Vermont, from 40Ar/39Ar geochronology Schnalzer, K., Webb, L., McCarthy, K., University of Vermont Department of Geology, Burlington Vermont, USA CLM 40 39 Sample Mineral Assemblage Metamorphic Facies Abstract Microstructure and Ar/ Ar Geochronology 18CD08A Quartz, Muscovite, Biotite, Feldspar, Epidote Upper Greenschist to Lower Amphibolite The Chester and Athens Domes are a composite mantled gneiss QC Twelve samples were collected during the fall of 2018 from the shear zones bounding the Chester and Athens Domes for 18CD08B Quartz, Biotite, Feldspar, Amphibole Amphibolite Facies 18CD08C Quartz, Muscovite, Biotite, Feldspar, Epidote Upper Greenschist to Lower Amphibolite dome in southeast Vermont. While debate persists regarding Me 40 39 microstructural analysis and Ar/ Ar age dating. These samples were divided between two transects, one in the northeastern 18CD08D Quartz, Muscovite, Biotite, Feldspar, Garnet Upper Greenschist to Lower Amphibolite the mechanisms of dome formation, most workers consider the VT NH section of the Chester dome and the second in the southern section of the Athens dome. These samples were analyzed by X-ray 18CD08E Quartz, Muscovite Greenschist Facies domes to have formed during the Acadian Orogeny. This study diraction in the fall of 2018. Oriented, orthogonal thin sections were also prepared for each of the twelve samples. The thin sec- 18CD09A Quartz, Amphibole Amphib olite Facies 40 CVGT integrates the results of Ar/Ar step-heating of single mineral NY tions named with an “X” were cut parallel to the stretching lineation (X) and normal to the foliation (Z) whereas the thin sections 18CD09B Quartz, Biotite, Feldspar, Amphibole, Muscovite Amphibolite Facies grains, or small multigrain aliquots, with data from microstruc- 18CD09C Quartz, Amphibole, Feldspar Amphibolite Facies named with a “Y” have been cut perpendicular to the ‘X-Z’ thin section. -
Sedimentary Record of Cretaceous And
SEDIMENT AR Y RECORD OF CRETACEOUS AND TER TIAR Y SALT MOVEMENT, EAST TEXAS BASIN: TIMES, RATES, AND LUMES OF SALT FLOW, IMPLICATIONS TO NUCLEAR-WA TE ISOLATION AND PETROLEUM EXPLO ATION by Steven J. Seni and M. P. A. ackson This work was supported by U.S. Depart ent of Energy and funded under Contract No. DE-AC 7-80ET46617 CONTENTS ABSTRACT . • 00 INTRODUCTION. • 00 Data Base. • 00 Early History of Basin Formation and Infilling • 00 Geometry of Salt Structures • 00 EVOLUTIONARY STAGES OF DOME GROWTH. • 00 Pillow Stage . • 00 Geometry of Overlying Strata . • 00 Geometry of Surrounding Strata • 00 Depositional Facies and Lithostratigraph • 00 Diapir Stage • • 00 Geometry of Surrounding Strata • 00 Depositional Facies and Lithostratigraph • 00 Post-Diapir Stage • 00 Geometry of Surrounding Strata • 00 Depositional Facies and Lithostratigraphy • 00 Holocene Analogues. • 00 Discussion • 00 Significance to Subtle Petroleum Traps • 00 PATTERNS OF SALT MOVEMENT IN TIME AND SPAC • 00 Group 1: Pre-Glen Rose Subgroup (pre-112 Ma) - Periphery of Diapir Province • • 00 Group 2: Glen Rose Subgroup to Washita Group 112 to 98 Ma)- Basin Axis • 00 Group 3: Post-Austin Group (86 to 56 Ma) -- Per phery of Diapir Province • • 00 Initiation and Acceleration of Salt Flow • • 00 Overview of Dome History • • 00 RATES OF SALT MOVEMENT AND DOME GROWTH • • 00 Assumptions • • 00 Proven Propositions. • 00 Unproven Propositions • 00 Incorrect Propositions • • 00 Distinguishing Between Syndepositional and Post-D positional Thickness Variations. • 00 The Problem • • 00 Structural Evidence • • 00 Sedimentological Evidence • • 00 Methodology • • 00 Distinguishing Between Regional and Salt-Re ated Thickness Variations. • 00 Volume of Salt Mobilized and Estimates of S t Loss • 00 Rates of Dome Growth • • 00 Net Rates of Pillow Growth • 00 Net Rates of Diapir Growth • 00 Gross Rates of Diapir Growth • • 00 Growth Rates and Strain Rates • 00 IMPLICA TIONS TO WASTE ISOLATION • • 00 CONCLUSIONS • • 00 ACKNOWLEDGMENTS • • 00 REFERENCES • 00 APPENDICES • 00 Figures 1. -
Influences of Surface Processes on Fold Growth During 3D Detachment
PUBLICATIONS Geochemistry, Geophysics, Geosystems RESEARCH ARTICLE Influences of surface processes on fold growth during 3-D 10.1002/2014GC005450 detachment folding Key Point: M. Collignon1, B. J. P. Kaus2, D. A. May3, and N. Fernandez2 Influences of surface processes on the fold pattern in fold-and-thrust 1Geological Institute, ETH Zurich, Zurich, Switzerland, 2Institut fur€ Geowissenschaften, Johannes Gutenberg-Universit€at, belts Mainz, Germany, 3Institute of Geophysics, ETH Zurich, Zurich, Switzerland Correspondence to: M. Collignon, Abstract In order to understand the interactions between surface processes and multilayer folding sys- [email protected] tems, we here present fully coupled three-dimensional numerical simulations. The mechanical model repre- sents a sedimentary cover with internal weak layers, detached over a much weaker basal layer representing Citation: salt or evaporites. Applying compression in one direction results in a series of three-dimensional buckle folds, Collignon, M., B. J. P. Kaus, D. A. May, and N. Fernandez (2014), Influences of of which the topographic expression consists of anticlines and synclines. This topography is modified through surface processes on fold growth time by mass redistribution, which is achieved by a combination of fluvial and hillslope erosion, as well as during 3-D detachment folding, deposition, and which can in return influence the subsequent deformation. Model results show that surface Geochem. Geophys. Geosyst., 15, doi:10.1002/2014GC005450. processes do not have a significant influence on folding patterns and aspect ratio of the folds. Nevertheless, erosion reduces the amount of shortening required to initiate folding and increases the exhumation rates. Received 9 JUN 2014 Increased sedimentation in the synclines contributes to this effect by amplifying the fold growth rate by grav- Accepted 29 JUL 2014 ity. -
Geological Survey of Wyoming
GEOLOGICAL SURVEY OF WYOMING SELECTED REFERENCES USED TO CO~IPILE THE ~IETALLIC AND INDUSTRIAL MI ERALS ~IAP OF WYOMING by Ray E. Harris and W. Dan Hausel OPEN FILE REPORT 85-1 1985 This report has no~ been reviewed for conformity with the editorial standards of the Geological Survey of Wyoming. CONTENTS District or Region Page Introduction . iii Absaroka Mountains ...........................•.......................... 1 Aladdin District . 1 Barlow Canyon District . 1 Bear Lodge District . 1 Big Creek District . 2 Bighorn Basin . 2 Bighorn Mountains ...•................................................... 3 Black Hills . 4 Carlile District ...........•............................................ 5 Centennial Ridge District . 5 Clay Spur District ...................................•.................. 5 Colony District . 6 Cooke City - New World District . 6 Copper Mountain District .........................................•...... 7 Cooper Hill District . 7 Crooks Gap-Green Mountain District . 7 Deer Creek District . 8 Denver Basin . 8 Elkhorn Creek District . 8 Esterbrook District . 8 Gas Hills District . 8 Gold Hill District . 9 Grand Encampment District . 9 Granite Mountains . 9 Green River Basin ................................•...................... 10 Gras Ventre Mountains ..................•...............•................ 11 Hanna Basin . 11 Hartville Uplift . 12 Hulett Creek District .........................................•......... 13 Iron Mountain District . 13 Iron Mountain Kimberlite District ......•............................... -
Geology and Petrology of the Devils Tower, Missouri Buttes, and Barlow Canyon Area, Crook County, Wyoming Don L
University of North Dakota UND Scholarly Commons Theses and Dissertations Theses, Dissertations, and Senior Projects 1980 Geology and petrology of the Devils Tower, Missouri Buttes, and Barlow Canyon area, Crook County, Wyoming Don L. Halvorson University of North Dakota Follow this and additional works at: https://commons.und.edu/theses Part of the Geology Commons Recommended Citation Halvorson, Don L., "Geology and petrology of the Devils Tower, Missouri Buttes, and Barlow Canyon area, Crook County, Wyoming" (1980). Theses and Dissertations. 119. https://commons.und.edu/theses/119 This Dissertation is brought to you for free and open access by the Theses, Dissertations, and Senior Projects at UND Scholarly Commons. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of UND Scholarly Commons. For more information, please contact [email protected]. GEOLOGY AND PETROLOGY OF THE DEVILS TOWER, MISSOURI BUTTES, AND BARLOW CANYON AREA, CROOK c.OUNTY, WYOMING by Don L. Halvorson Bachelor of Science, University of Colorado, 1965 Master of Science Teaching, University of North Dakota, 1971 A Dissertation Submitted to the Graduate Faculty of the University of North Dakota in partial fulfillment of the requirements for the degree of Doctor of Philosophy Grand Forks, North Dakota May 1980 Th:ls clisserratio.1 submitted by Don L. Halvol'.'son in partial ful fillment of the requirements fo1· the Degree of Doctor of Philosophy from the University of North Dakota is hereby approved by the Faculty Advisory Committee under whora the work has been done. This dissertation meets the standards for appearance aud con forms to the style and format requirements of the Graduate School of the University of North Dakota, and is hereby approved. -
Geology and Description of Thorium and Rare-Earth Deposits in the Southern Bear Lodge Mountains, Northeastern Wyoming
l^ft PER COVER PHOTOGRAPHS 1 . Asbestos ore 8. Aluminum ore, bauxite, Georgia 1 2 3 4 2. Lead ore, Balmat mine, N. Y. 9. Native copper ore, Keweenawan 5 6 3. Chromite-chromium ore, Washington Peninsula, Mich. 4. Zinc ore, Friedensville, Pa. 10. Porphyry molybdenum ore, Colorado 7 8 5. Banded iron-formation. Palmer, 11. Zinc ore, Edward, N. Y. Michigan 12. Manganese nodules, ocean floor 9 10 6. Ribbon asbestos ore, Quebec, Canada 13. Botryoidal fluorite ore, 11 12 13 14 7. Manganese ore, banded Poncha Springs, Colo. rhodochrosite 14. Tungsten ore. North Carolina Geology and Description of Thorium and Rare-Earth Deposits in the Southern Bear Lodge Mountains, Northeastern Wyoming By MORTIMER H. STAATZ GEOLOGY AND RESOURCES OF THORIUM IN THE UNITED STATES GEOLOGICAL SURVEY PROFESSIONAL PAPER 1049-D A description of the size, mineralogy, chemical composition, economic geology, and geologic setting of the thorium and rare-earth veins and newly discovered large disseminated deposits UNITED STATES GOVERNMENT PRINTING OFFICE, W AS H I NGTON : 1 983 UNITED STATES DEPARTMENT OF THE INTERIOR JAMES G. WATT, Secretary GEOLOGICAL SURVEY Dallas L. Peck, Director Library of Congress Cataloging in Publication Data Staatz, Mortimer Hay, 1918- Geology and description of thorium and rare-earth deposits in the southern Bear Lodge Mountains, northeastern Wyoming (Geological Survey Professional Paper 1049-D) Bibliography: 52 p. Supt. of Docs. No.: I 19.16:1049-D 1. Thorium ores Wyoming Bear Lodge Mountains. 2. Earth, Rare Wyoming Bear Lodge Mountains. I. Title. II. Series. III. Series: Geological Survey Professional Paper 1049-D QE390.2.T45S73 553.4'93 81-607092 AACR2 For sale by the Superintendent of Documents, U.S. -
Rocky Mountain Birds: Birds and Birding in the Central and Northern Rockies
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Zea E-Books Zea E-Books 11-4-2011 Rocky Mountain Birds: Birds and Birding in the Central and Northern Rockies Paul A. Johnsgard University of Nebraska - Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/zeabook Part of the Ecology and Evolutionary Biology Commons, and the Poultry or Avian Science Commons Recommended Citation Johnsgard, Paul A., "Rocky Mountain Birds: Birds and Birding in the Central and Northern Rockies" (2011). Zea E-Books. 7. https://digitalcommons.unl.edu/zeabook/7 This Book is brought to you for free and open access by the Zea E-Books at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Zea E-Books by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. ROCKY MOUNTAIN BIRDS Rocky Mountain Birds Birds and Birding in the Central and Northern Rockies Paul A. Johnsgard School of Biological Sciences University of Nebraska–Lincoln Zea E-Books Lincoln, Nebraska 2011 Copyright © 2011 Paul A. Johnsgard. ISBN 978-1-60962-016-5 paperback ISBN 978-1-60962-017-2 e-book Set in Zapf Elliptical types. Design and composition by Paul Royster. Zea E-Books are published by the University of Nebraska–Lincoln Libraries. Electronic (pdf) edition available online at http://digitalcommons.unl.edu/zeabook/ Print edition can be ordered from http://www.lulu.com/spotlight/unllib Contents Preface and Acknowledgments vii List of Maps, Tables, and Figures x 1. Habitats, Ecology and Bird Geography in the Rocky Mountains Vegetational Zones and Bird Distributions in the Rocky Mountains 1 Climate, Landforms, and Vegetation 3 Typical Birds of Rocky Mountain Habitats 13 Recent Changes in Rocky Mountain Ecology and Avifauna 20 Where to Search for Specific Rocky Mountain Birds 26 Synopsis of Major Birding Locations in the Rocky Mountains Region U.S. -
Storm Data and Unusual Weather Phenomena ....…….…....………..……
FEBRUARY 2003 VOLUME 45 NUMBER 2 SSTORMTORM DDATAATA AND UNUSUAL WEATHER PHENOMENA WITH LATE REPORTS AND CORRECTIONS NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION noaa NATIONAL ENVIRONMENTAL SATELLITE, DATA AND INFORMATION SERVICE NATIONAL CLIMATIC DATA CENTER, ASHEVILLE, NC Cover: A complex storm system brought wintery weather across northern Virginia between February 14 and 18th. Nicknamed the “President’s Weekend Snowstorm of 2003”, this storm is listed as the 5th heaviest snowstorm in Washington D.C. since 1870. A total of 16.7 inches of snow and sleet was recorded at Reagan National Airport. Pictured is a wintery scene from Leesburg, VA where snow amounts ranged from 20 to 36 inches. (Photo courtesy: Jim DeCarufel, NWS Forecast Offi ce Baltimore/Washington.) TABLE OF CONTENTS Page Outstanding Storm of the Month …..…………….….........……..…………..…….…..…..... 4 Storm Data and Unusual Weather Phenomena ....…….…....………..……...........…............ 5 Reference Notes .............……...........................……….........…..……............................................. 154 STORM DATA (ISSN 0039-1972) National Climatic Data Center Editor: William Angel Assistant Editors: Stuart Hinson and Rhonda Mooring STORM DATA is prepared, and distributed by the National Climatic Data Center (NCDC), National Environmental Satellite, Data and Information Service (NESDIS), National Oceanic and Atmospheric Administration (NOAA). The Storm Data and Unusual Weather Phenomena narratives and Hurricane/Tropical Storm summaries are prepared by the National Weather Service. Monthly and annual statistics and summaries of tornado and lightning events re- sulting in deaths, injuries, and damage are compiled by the National Climatic Data Center and the National Weather Service’s (NWS) Storm Prediction Center. STORM DATA contains all confi rmed information on storms available to our staff at the time of publication. Late reports and corrections will be printed in each edition. -
Fire in the Black Hills Forest-Grass Ecotonel
Fire in the Black Hills Forest-Grass Ecotonel F. ROBERT GARTNER AND WESLEY W. THOMPSON2 Associate Professor of Range Ecology and Range Research Assistant, Animal Science Department, West River Agricultural Research and Extension Center of South Dakota State University, 801 San Francisco Street, Rapid City, SD 57701 INTRODUCTION SOUTH Dakota is located in the geographical center of the North American continent, equidistant from the Atlantic and Pacific Oceans, and midway between the North Pole and the equa tor (United States Dept. Interior 1967). The Black Hills are situated along the state's western border (Fig. 1) lying principally within parallels 43 and 45 degrees north latitude and meridians, 103 and 104 degrees, 30 minutes, west longitude, largely in South Dakota, partly in Wyoming (Johnson 1949). Total area is about 5,150 mi2, including the Bear Lodge Mountains in northeastern Wyoming (Orr 1959). After leading a scientific party through the Black Hills in the summer of 1875, Colonel R. I. Dodge (1876) concluded: The Black Hills country is a true oasis in a wide and dreary desert. The approaches from every direction are through long 1 Approved by the director of the South Dakota Agricultural Experiment Station as Journal Series No. 1115. • Associate Professor of Range Ecology and Range Research Assistant, Animal Science Department, West River Agricultural Research and Extension Center of South Dakota State University, 801 San Francisco Street., Rapid City, South Dakota. 37 F. R. GARTNER AND W. ·W. THOMPSON o o o (Y) (\J o<::t o o MONTANA ---···----··~~------~------~--------L45° SOUTH DAKOTA ~ ______--4------- ____-+-44° WYOMING SCALE o••• miles 45 FIG. -
The Yellowstone Paleontological Survey
E PALEONT ON O T LO S G W I O C L A L L E National Y Park The Yellowstone Service Department of the Interior Paleontological Survey SURVEY Vincent L. Santucci Yellowstone Center for Resources National Park Service Yellowstone National Park, Wyoming YCR-NR-98-1 1998 How to cite this document: Santucci, V. L. 1998. The Yellowstone Paleontological Survey. Yellowstone Center for Resources, National Park Service, Yellowstone National Park, Wyoming,YCR-NR-98-1. Current address for Vincent L. Santucci is National Park Service, P.O. Box 592, Kemmerer, WY 83101. The Yellowstone Paleontological Survey To Lt. Col. Luke J. Barnett, III “Uncle by blood, brother in spirit!” Vincent L. Santucci Yellowstone Center for Resources National Park Service Yellowstone National Park, Wyoming YCR-NR-98-1 1998 Table of Contents Introduction .................................................................................................... 1 Stratigraphy .................................................................................................... 4 Fossil Chronology........................................................................................... 6 Taxonomy ..................................................................................................... 12 Localities ...................................................................................................... 15 Interpretation ................................................................................................ 19 Paleontological Resource Management....................................................... -
TIES, MONTANA. by CF BOWEN. Previo
ANTICLINES IN A PART OF THE MUSSELSHELL VALLEY, MUSSELSHELL, MEAGHER, AND SWEETGRASS COUN TIES, MONTANA. By C. F. BOWEN. INTRODUCTION. Previous investigations had shown that the Musselshell Valley, Mont, is an area in which the rocks have undergone considerable folding. On the basis of this information work was begun in June, 1916, to determine the nature and extent of the folds and to make examination as to the possible occurrence of accumulations of oil and gas in them. The work has demonstrated the existence within the area studied of several well-developed anticlines and domes, which seem to offer structurally favorable places for the accumulation of oil and gas. The demonstration of the presence or absence of commercial accumulations of these fluids in the folds has been less conclusive, owing largely to the undeveloped condition of the area. No direct surface indications of oil were observed, but hydrogen sulphide gas escapes from several water seeps in one part of the area. It is also reported that gas was encountered in several wells dug for water. None of these reports could be verified. At the time of the examination drilling operations within the area were confined to two wells. One of these wells, on the Big Elk dome, had reached the Kootenai formation; the other, in the Woman's Pocket anticline, was probably somewhat more than halfway through the Colorado shale. In neither place had oil been discovered. Two other wells, one about 15 miles east of the area and the other about 12 miles south of the central portion of it, had previously been drilled through the Colo rado shale without any discovery of oil. -
YELLOWSTONE NATIONAL PARK R N C Hard-Sided Camping Units Only C E Perc an Ez Pelic N See Detail Map Above PE L LICAN
Services and Facilities Mammoth Hot Springs Old Faithful Canyon Village West Thumb Fishing Bridge, Lake Village 6239ft 1902m 7365ft 2254m 7734ft 2357m and Grant Village 7733ft 2357m and Bridge Bay 7784ft 2373m 0 0.1 0.5 Km To Gardiner To Madison To Tower-Roosevelt To Lake Village 0 0.5 Km To Canyon Emergencies Check the park news- Mammoth Hot Springs Hotel Grand Geyser Amphitheater For medical or other emer- paper for seasonal dates Fi Duck 0 0.1 Mi 0.5 Post Amphitheater re To Norris 0 0.5 Mi h gencies contact a ranger or of services and facilities. Office o Lake Fishing Bridge le West Thumb Ice Visitor Education call 307-344-7381 or 911. Geyser Amphitheater Hill West Thumb Castle Center Showers-Laundry Ranger station To Geyser Basin Geyser Ri Old Ice Upper Terrace Drive: Park ve Canyon Lodge Medical clinic r Faithful Visitor Headquarters no buses, RVs, or trailers; y Information Station Campground a closed in winter Center To East HISTORIC w Bookstore - Showers Entrance Winter road closures FORT e n Laundry YELLOWSTONE o YELLOWSTONE From early November to Lodging Lake Village Post early May most park roads LOWER Office Lake Lodge UPPER TERRACES Chapel Old Faithful Inn Old Faithful LAKE are closed. The exception Food service TERRACES AREA Geyser Lower Falls is the road in the park AREA Old 308ft Upper Lookout between the North one-way Faithful Falls 94m Fishing Bridge Picnic area To Point Amphitheater North Lodge View Grand Recreational Vehicle Park Entrance and Cooke City. Inspiration hard-sided camping units only Entrance Post Office View Point It is open all year.