Description of the Silverton Quadrangle
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University of Oklahoma Graduate College
UNIVERSITY OF OKLAHOMA GRADUATE COLLEGE POTENTIAL FIELD STUDIES OF THE CENTRAL SAN LUIS BASIN AND SAN JUAN MOUNTAINS, COLORADO AND NEW MEXICO, AND SOUTHERN AND WESTERN AFGHANISTAN A DISSERTATION SUBMITTED TO THE GRADUATE FACULTY in partial fulfillment of the requirements for the Degree of DOCTOR OF PHILOSOPHY By BENJAMIN JOHN DRENTH Norman, Oklahoma 2009 POTENTIAL FIELD STUDIES OF THE CENTRAL SAN LUIS BASIN AND SAN JUAN MOUNTAINS, COLORADO AND NEW MEXICO, AND SOUTHERN AND WESTERN AFGHANISTAN A DISSERTATION APPROVED FOR THE CONOCOPHILLIPS SCHOOL OF GEOLOGY AND GEOPHYSICS BY _______________________________ Dr. G. Randy Keller, Chair _______________________________ Dr. V.J.S. Grauch _______________________________ Dr. Carol Finn _______________________________ Dr. R. Douglas Elmore _______________________________ Dr. Ze’ev Reches _______________________________ Dr. Carl Sondergeld © Copyright by BENJAMIN JOHN DRENTH 2009 All Rights Reserved. TABLE OF CONTENTS Introduction…………………………………………………………………………..……1 Chapter A: Geophysical Constraints on Rio Grande Rift Structure in the Central San Luis Basin, Colorado and New Mexico………………………………………………………...2 Chapter B: A Geophysical Study of the San Juan Mountains Batholith, southwestern Colorado………………………………………………………………………………….61 Chapter C: Geophysical Expression of Intrusions and Tectonic Blocks of Southern and Western Afghanistan…………………………………………………………………....110 Conclusions……………………………………………………………………………..154 iv LIST OF TABLES Chapter A: Geophysical Constraints on Rio Grande Rift Structure in the Central -
Segment 25 of the Colorado Trail Starts at Little Molas Lake. Hikers
! COLORADO TRAIL (SECTION NORTHWEST OF LITTLE MOLAS LAKE), SILVERTON, COLORADO Segment 25 of the Colorado Trail starts at Little Molas Lake. Hikers (and mountain bikers) can also do day-trips on this part of the trail by starting from the Little Molas Lake parking area and heading northwest. The first part of this section of the Colorado Trail passes beneath Sultan Mountain and the Grand Turk. The views from this trail are spectacular, although the wildflowers aren't quite as nice as they were on the other two hikes we did in this area after this one (Coal Bank Pass and Snowdon Meadows). We had hoped to continue further along the trail than we did, but we were not yet aware how early in the afternoon thunderstorms can appear in this area (and the trail goes along an exposed ridge). ! ! Driving by the Hermosa Cliffs on our way north along the San Juan Skyway from Durango. ! " Engineer Mountain is visible for some distance on this drive. ! " This is the southwestern part of the ridge by Coal Bank Pass. ! " ! ! ! ! ! ! Looking southeast at what I think must be North Twilight Peak. Crater Lake should be in the small valley just to the left of the peak. ! " Looking north towards the North Lime Creek valley, which is just west of Sultan Mountain and the Grand Turk (which are two peaks visible in all three of my July 2017 trip reports from this area). ! " Looking north again, towards Molas Pass (right of center). ! " Looking northeast, with Snowdon Peak to the left in this photo (I am not sure what the peaks to the right of center and which are just barely visible in the background are called). -
Sunnyside 29 SGC-042125 Chapter VII Appendices
A PP E NDIX 7A: GEOLOGY APPENDIX 7B: HISTORY APPENDIX 7C: MINING HISTORY o j tlu* Animus /iu vr' A PP E N D I X 7 A O verview of Geology Anim as River W atershed Above Silverton Prepared for the Animas River Stakeholders Group Use Attainability Analysis Prepared By B.K Stover Colorado Division of Minerals and Geology VOLCANIC HISTORY OF THE SILVERTON CALDERA Water Quality Bedrock Geology Precambrian Metamorphic Roclcs Paleozoic Sedimentary Rocks Upper Paleozoic And Mesozoic Sedimentary Rocks ' Tertiary Sedimentary Rocks Tertiary Volcanic Rocks Surficial Geology Structural Geology nydrothcrmal Alteration CEMENT CREEK SUB-BASTN Stratigraphy Structural Geology nydrothcrmal Alteration Surficial Geology ROSS BASIN WATERSHED Bedrock Geology Structural Geology Itydrothermal Alteration Ore Mineralization Surficial Geology CEMENT CREEK-BONITA PEAK WATERSHED AREA Bedrock Geology Structural Geology Hydrothermal Alteration Ore Mineralization Surficial Geology SOUTH FORK CEMENT CREEK AREA 19 Location 19 Bcdrock Geology 19 Structural Geology 19 Hydrothermal Alteration 20 Ore Mineralization 20 Surficial Geology 20 PROSPECT GULCII-GEORGIA GULCH AREA 21 Location 21 Geologic Setting 21 Bedrock Geology 21 Structural Geology 22 Hydrothermal Alteration 22 Ore Mineralization 22 Surficial Geology 23 LOWER CEMENT CREEK AREA 24 Location 24 Geologic Setting 24 Bedrock Geology 24 Structural Geology 24 Hydrothermal Alteration 24 Ore Mineralization 25 Surficial Geology 25 ANIMAS RIVER HEADWATERS AND BURROWS CREEK 26 Location 26 Geologic Setting 27 CALIFORNIA GULCH -
This Electronic Thesis Or Dissertation Has Been Downloaded from the King’S Research Portal At
This electronic thesis or dissertation has been downloaded from the King’s Research Portal at https://kclpure.kcl.ac.uk/portal/ Inimitable? The Afterlives and Cultural Memory of Charles Dickens’s Characters England, Maureen Bridget Awarding institution: King's College London The copyright of this thesis rests with the author and no quotation from it or information derived from it may be published without proper acknowledgement. END USER LICENCE AGREEMENT Unless another licence is stated on the immediately following page this work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International licence. https://creativecommons.org/licenses/by-nc-nd/4.0/ You are free to copy, distribute and transmit the work Under the following conditions: Attribution: You must attribute the work in the manner specified by the author (but not in any way that suggests that they endorse you or your use of the work). Non Commercial: You may not use this work for commercial purposes. No Derivative Works - You may not alter, transform, or build upon this work. Any of these conditions can be waived if you receive permission from the author. Your fair dealings and other rights are in no way affected by the above. Take down policy If you believe that this document breaches copyright please contact [email protected] providing details, and we will remove access to the work immediately and investigate your claim. Download date: 08. Oct. 2021 1 INIMITABLE? THE AFTERLIVES AND CULTURAL MEMORY OF CHARLES DICKENS’S CHARACTERS Maureen Bridget England King’s College London Candidate Number: 1233164 Thesis for PhD in English Literature 2 This paper is dedicated to the two doctors in my life who inspired me to pursue this dream: Martin England and Jenna Higgins 3 ‘Any successfully evoked character, no matter how apparently insignificant, stands a good chance of surviving its creator.’ David Galef, The Supporting Cast (1993) 4 Table of Contents TABLE OF CONTENTS ........................................................................................................ -
Historical Range of Variability and Current Landscape Condition Analysis: South Central Highlands Section, Southwestern Colorado & Northwestern New Mexico
Historical Range of Variability and Current Landscape Condition Analysis: South Central Highlands Section, Southwestern Colorado & Northwestern New Mexico William H. Romme, M. Lisa Floyd, David Hanna with contributions by Elisabeth J. Bartlett, Michele Crist, Dan Green, Henri D. Grissino-Mayer, J. Page Lindsey, Kevin McGarigal, & Jeffery S.Redders Produced by the Colorado Forest Restoration Institute at Colorado State University, and Region 2 of the U.S. Forest Service May 12, 2009 Table of Contents EXECUTIVE SUMMARY … p 5 AUTHORS’ AFFILIATIONS … p 16 ACKNOWLEDGEMENTS … p 16 CHAPTER I. INTRODUCTION A. Objectives and Organization of This Report … p 17 B. Overview of Physical Geography and Vegetation … p 19 C. Climate Variability in Space and Time … p 21 1. Geographic Patterns in Climate 2. Long-Term Variability in Climate D. Reference Conditions: Concept and Application … p 25 1. Historical Range of Variability (HRV) Concept 2. The Reference Period for this Analysis 3. Human Residents and Influences during the Reference Period E. Overview of Integrated Ecosystem Management … p 30 F. Literature Cited … p 34 CHAPTER II. PONDEROSA PINE FORESTS A. Vegetation Structure and Composition … p 39 B. Reference Conditions … p 40 1. Reference Period Fire Regimes 2. Other agents of disturbance 3. Pre-1870 stand structures C. Legacies of Euro-American Settlement and Current Conditions … p 67 1. Logging (“High-Grading”) in the Late 1800s and Early 1900s 2. Excessive Livestock Grazing in the Late 1800s and Early 1900s 3. Fire Exclusion Since the Late 1800s 4. Interactions: Logging, Grazing, Fire, Climate, and the Forests of Today D. Summary … p 83 E. Literature Cited … p 84 CHAPTER III. -
Colorado Fourteeners Checklist
Colorado Fourteeners Checklist Rank Mountain Peak Mountain Range Elevation Date Climbed 1 Mount Elbert Sawatch Range 14,440 ft 2 Mount Massive Sawatch Range 14,428 ft 3 Mount Harvard Sawatch Range 14,421 ft 4 Blanca Peak Sangre de Cristo Range 14,351 ft 5 La Plata Peak Sawatch Range 14,343 ft 6 Uncompahgre Peak San Juan Mountains 14,321 ft 7 Crestone Peak Sangre de Cristo Range 14,300 ft 8 Mount Lincoln Mosquito Range 14,293 ft 9 Castle Peak Elk Mountains 14,279 ft 10 Grays Peak Front Range 14,278 ft 11 Mount Antero Sawatch Range 14,276 ft 12 Torreys Peak Front Range 14,275 ft 13 Quandary Peak Mosquito Range 14,271 ft 14 Mount Evans Front Range 14,271 ft 15 Longs Peak Front Range 14,259 ft 16 Mount Wilson San Miguel Mountains 14,252 ft 17 Mount Shavano Sawatch Range 14,231 ft 18 Mount Princeton Sawatch Range 14,204 ft 19 Mount Belford Sawatch Range 14,203 ft 20 Crestone Needle Sangre de Cristo Range 14,203 ft 21 Mount Yale Sawatch Range 14,200 ft 22 Mount Bross Mosquito Range 14,178 ft 23 Kit Carson Mountain Sangre de Cristo Range 14,171 ft 24 Maroon Peak Elk Mountains 14,163 ft 25 Tabeguache Peak Sawatch Range 14,162 ft 26 Mount Oxford Collegiate Peaks 14,160 ft 27 Mount Sneffels Sneffels Range 14,158 ft 28 Mount Democrat Mosquito Range 14,155 ft 29 Capitol Peak Elk Mountains 14,137 ft 30 Pikes Peak Front Range 14,115 ft 31 Snowmass Mountain Elk Mountains 14,099 ft 32 Windom Peak Needle Mountains 14,093 ft 33 Mount Eolus San Juan Mountains 14,090 ft 34 Challenger Point Sangre de Cristo Range 14,087 ft 35 Mount Columbia Sawatch Range -
Late Pleistocene Glacial Equilibrium-Line Altitudes in the Colorado Front Range: a Comparison of Methods
QUATERNARY RESEARCH l&289-310 (1982) Late Pleistocene Glacial Equilibrium-Line Altitudes in the Colorado Front Range: A Comparison of Methods THOMAS C. MEIERDING Department of Geography and Center For Climatic Research, University of Delaware, Newark, Delaware 19711 Received July 6, 1982 Six methods for approximating late Pleistocene (Pinedale) equilibrium-line altitudes (ELAs) are compared for rapidity of data collection and error (RMSE) from first-order trend surfaces, using the Colorado Front Range. Trend surfaces computed from rapidly applied techniques, such as glacia- tion threshold, median altitude of small reconstructed glaciers, and altitude of lowest cirque floors have relatively high RMSEs @I- 186 m) because they are subjectively derived and are based on small glaciers sensitive to microclimatic variability. Surfaces computed for accumulation-area ratios (AARs) and toe-to-headwall altitude ratios (THARs) of large reconstructed glaciers show that an AAR of 0.65 and a THAR of 0.40 have the lowest RMSEs (about 80 m) and provide the same mean ELA estimate (about 3160 m) as that of the more subjectively derived maximum altitudes of Pinedale lateral moraines (RMSE = 149 m). Second-order trend surfaces demonstrate low ELAs in the latitudinal center of the Front Range, perhaps due to higher winter accumulation there. The mountains do not presently reach the ELA for large glaciers, and small Front Range cirque glaciers are not comparable to small glaciers existing during Pinedale time. Therefore, Pleistocene ELA depression and consequent temperature depression cannot reliably be ascertained from the calcu- lated ELA surfaces. INTRODUCTION existed in alpine regions (Charlesworth, Glacial equilibrium-line altitudes (ELAs) 1957; ostrem, 1966; Flint, 1971; Andrews, have been widely used to infer present and 1975). -
Geochronology Database for Central Colorado
Geochronology Database for Central Colorado Data Series 489 U.S. Department of the Interior U.S. Geological Survey Geochronology Database for Central Colorado By T.L. Klein, K.V. Evans, and E.H. DeWitt Data Series 489 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior KEN SALAZAR, Secretary U.S. Geological Survey Marcia K. McNutt, Director U.S. Geological Survey, Reston, Virginia: 2010 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod To order this and other USGS information products, visit http://store.usgs.gov Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this report. Suggested citation: T.L. Klein, K.V. Evans, and E.H. DeWitt, 2009, Geochronology database for central Colorado: U.S. Geological Survey Data Series 489, 13 p. iii Contents Abstract ...........................................................................................................................................................1 Introduction.....................................................................................................................................................1 -
Multiple Intrusions in the San Miguel Mountains, Colorado Calvin S
New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/19 Multiple intrusions in the San Miguel Mountains, Colorado Calvin S. Bromfield and Alfred L. Bush, 1968, pp. 94-99 in: San Juan, San Miguel, La Plata Region (New Mexico and Colorado), Shomaker, J. W.; [ed.], New Mexico Geological Society 19th Annual Fall Field Conference Guidebook, 212 p. This is one of many related papers that were included in the 1968 NMGS Fall Field Conference Guidebook. Annual NMGS Fall Field Conference Guidebooks Every fall since 1950, the New Mexico Geological Society (NMGS) has held an annual Fall Field Conference that explores some region of New Mexico (or surrounding states). Always well attended, these conferences provide a guidebook to participants. Besides detailed road logs, the guidebooks contain many well written, edited, and peer-reviewed geoscience papers. These books have set the national standard for geologic guidebooks and are an essential geologic reference for anyone working in or around New Mexico. Free Downloads NMGS has decided to make peer-reviewed papers from our Fall Field Conference guidebooks available for free download. Non-members will have access to guidebook papers two years after publication. Members have access to all papers. This is in keeping with our mission of promoting interest, research, and cooperation regarding geology in New Mexico. However, guidebook sales represent a significant proportion of our operating budget. Therefore, only research papers are available for download. Road logs, mini-papers, maps, stratigraphic charts, and other selected content are available only in the printed guidebooks. Copyright Information Publications of the New Mexico Geological Society, printed and electronic, are protected by the copyright laws of the United States. -
Ski Development in National Forests Harris D
University of Colorado Law School Colorado Law Scholarly Commons The ubP lic Lands During the Remainder of the 20th Getches-Wilkinson Center Conferences, Century: Planning, Law, and Policy in the Federal Workshops, and Hot Topics Land Agencies (Summer Conference, June 8-10) 6-10-1987 Ski Development in National Forests Harris D. Sherman David S. Neslin Ian K. Whitlock Follow this and additional works at: http://scholar.law.colorado.edu/public-lands-during- remainder-planning-law-and-policy-in-federal-land-agencies Part of the Administrative Law Commons, Animal Law Commons, Animal Studies Commons, Aquaculture and Fisheries Commons, Courts Commons, Dispute Resolution and Arbitration Commons, Energy Law Commons, Energy Policy Commons, Environmental Law Commons, Environmental Policy Commons, Forest Management Commons, Indian and Aboriginal Law Commons, Judges Commons, Jurisdiction Commons, Land Use Planning Commons, Legislation Commons, Litigation Commons, Natural Resources and Conservation Commons, Natural Resources Law Commons, Natural Resources Management and Policy Commons, Oil, Gas, and Energy Commons, Oil, Gas, and Mineral Law Commons, Peace and Conflict Studies Commons, Politics Commons, Property Law and Real Estate Commons, Recreation, Parks and Tourism Administration Commons, Soil Science Commons, State and Local Government Law Commons, Water Law Commons, and the Water Resource Management Commons Citation Information Sherman, Harris D.; Neslin, David S.; and Whitlock, Ian K., "Ski Development in National Forests" (1987). The Public Lands During the Remainder of the 20th Century: Planning, Law, and Policy in the Federal Land Agencies (Summer Conference, June 8-10). http://scholar.law.colorado.edu/public-lands-during-remainder-planning-law-and-policy-in-federal-land-agencies/16 Reproduced with permission of the Getches-Wilkinson Center for Natural Resources, Energy, and the Environment (formerly the Natural Resources Law Center) at the University of Colorado Law School. -
San Juan National Forest
SAN JUAN NATIONAL FOREST Colorado UNITED STATES DEPARTMENT OF AGRICULTURE V 5 FOREST SERVICE t~~/~ Rocky Mountain Region Denver, Colorado Cover Page. — Chimney Rock, San Juan National Forest F406922 UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1942 * DEPOSITED BY T,HE UNITED STATES OF AMERICA San Juan National Forest CAN JUAN NATIONAL FOREST is located in the southwestern part of Colorado, south and west of the Continental Divide, and extends, from the headwaters of the Navajo River westward to the La Plata Moun- \ tains. It is named after the San Juan River, the principal river drainage y in this section of the State, which, with its tributaries in Colorado, drains the entire area within the forest. It contains a gross area of 1,444,953 ^ acres, of which 1,255,977 are Government land under Forest Service administration, and 188,976 are State and privately owned. The forest was created by proclamation of President Theodore Roosevelt on June 3, 1905. RICH IN HISTORY The San Juan country records the march of time from prehistoric man through the days of early explorers and the exploits of modern pioneers, each group of which has left its mark upon the land. The earliest signs of habitation by man were left by the cliff and mound dwellers. Currently with or following this period the inhabitants were the ancestors of the present tribes of Indians, the Navajos and the Utes. After the middle of the eighteenth century the early Spanish explorers and traders made their advent into this section of the new world in increasing numbers. -
American Rockies: Photographs by Gus Foster EXHIBITION LIST All
American Rockies: Photographs by Gus Foster EXHIBITION LIST All photographs courtesy of artist except Windom Peak. Photographs are Ektacolor prints. Dimensions are frame size only. 1. Wheeler Peak, 1987 Sangre de Cristo Range Wheeler Peak Wilderness, New Mexico 360 degree panoramic photograph 30" x 144" 2. Continental Divide, 1998 Black Range Aldo Leopold Wilderness, New Mexico 372 degree panoramic photograph 24" x 96" 3. Truchas Lakes, 1986 Sangre de Cristo Range Pecos Wilderness, New Mexico 378 degree panoramic photograph 24" x 96" 4. Pecos Big Horns, 1989 Sangre de Cristo Range Pecos Wilderness, New Mexico 376 degree panoramic photograph 24" x 96" 5. Aspens, 1993 Sangre de Cristo Range Santa Fe National Forest, New Mexico 375 degree panoramic photograph 30" x 144" 6. Sandia Mountains, 1997 Sangre de Cristo Range Sandia Mountain Wilderness, New Mexico 365 degree panoramic photograph 16" x 70" 7. Chimayosos Peak, 1988 Sangre de Cristo Range Pecos Wilderness, New Mexico 376 degree panoramic photograph 16" x 70" 8. Venado Peak, 1990 Sangre de Cristo Range Latir Wilderness, New Mexico 380 degree panoramic photograph 16" x 70" 9. Winter Solstice, 1995 Sangre de Cristo Range Carson National Forest, New Mexico 368 degree panoramic photograph 16" x 70" 10. Beaver Creek Drainage, 1988 Carson National Forest Cruces Basin Wilderness, New Mexico 384 degree panoramic photograph 30" x 144" 11. Mt. Antero, 1990 Sawatch Range San Isabel National Forest, Colorado 368 degree panoramic photograph 24" x 96" 12. Mt. Yale, 1988 Sawatch Range Collegiate Peaks Wilderness, Colorado 370 degree panoramic photograph 24" x 96" 13. Windom Peak, 1989 Needle Mountains, San Juan Range Weminuche Wilderness, Colorado 378 degree panoramic photograph 30" x 144" Collection of The Albuquerque Museum 14.