Seniors Outdoors! Summer 2010 Outing Schedule
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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 CONTINENTAL DIVIDE TRAIL COALITION VISIT COLORADO! Day & Overnight Hikes on the Continental Divide Trail
CONTINENTAL DIVIDE NATIONAL SCENIC TRAIL DAY & OVERNIGHT HIKES: COLORADO CONTINENTAL DIVIDE TRAIL COALITION VISIT COLORADO! Day & Overnight Hikes on the Continental Divide Trail THE CENTENNIAL STATE The Colorado Rockies are the quintessential CDT experience! The CDT traverses 800 miles of these majestic and challenging peaks dotted with abandoned homesteads and ghost towns, and crosses the ancestral lands of the Ute, Eastern Shoshone, and Cheyenne peoples. The CDT winds through some of Colorado’s most incredible landscapes: the spectacular alpine tundra of the South San Juan, Weminuche, and La Garita Wildernesses where the CDT remains at or above 11,000 feet for nearly 70 miles; remnants of the late 1800’s ghost town of Hancock that served the Alpine Tunnel; the awe-inspiring Collegiate Peaks near Leadville, the highest incorporated city in America; geologic oddities like The Window, Knife Edge, and Devil’s Thumb; the towering 14,270 foot Grays Peak – the highest point on the CDT; Rocky Mountain National Park with its rugged snow-capped skyline; the remote Never Summer Wilderness; and the broad valleys and numerous glacial lakes and cirques of the Mount Zirkel Wilderness. You might also encounter moose, mountain goats, bighorn sheep, marmots, and pika on the CDT in Colorado. In this guide, you’ll find Colorado’s best day and overnight hikes on the CDT, organized south to north. ELEVATION: The average elevation of the CDT in Colorado is 10,978 ft, and all of the hikes listed in this guide begin at elevations above 8,000 ft. Remember to bring plenty of water, sun protection, and extra food, and know that a hike at elevation will likely be more challenging than the same distance hike at sea level. -
2011, Winter – Bikepacking the CT
News from the Colorado Trail Foundation WINTER 2011 Bikepacking (and Hike-A-Biking) the Colorado Trail By Judd Rohwer (Rohwer, of Sandia Park, New Mexico, is a member of that’s NUTS. Back of the Pack Racing, a team of riders that describes But then the wheels started turning. And I’m not itself as “a fundamental movement that supports the talking about the 29 inchers on my Black Sheep single- theory of ‘me against mainstream.’ Our team attempts speed. I started thinking about the adventure, the to do everything the ‘right way,’ but not your way. We glory ... and the risks. I started thinking about the are a group of engineers, pilots, dreamers and UFO mental preparation, the physical training, the gear ... chasers. One thing is certain. If the race is long enough, and the danger. we will catch you – maybe.” What follows is his The challenge of The Colorado Trail seemed so description of his bikepacking adventures last summer massive compared to the usual 24-hour mountain on The Colorado Trail.) bike races that we train and live for at Back of the Pack Racing. But I wanted to face the challenge head on, so I made a commitment to myself and started planning for a 2011 attempt at the CTR. Then reality hit: the reality of a 500-mile self- supported race hit me straight in the face. Racing myself to the edge of exhaustion and beyond didn’t sound like much fun. So, I quickly convinced myself that the best way to experience the CT was to approach the adventure as a self-supported tour, not a race. -
Profiles of Colorado Roadless Areas
PROFILES OF COLORADO ROADLESS AREAS Prepared by the USDA Forest Service, Rocky Mountain Region July 23, 2008 INTENTIONALLY LEFT BLANK 2 3 TABLE OF CONTENTS ARAPAHO-ROOSEVELT NATIONAL FOREST ......................................................................................................10 Bard Creek (23,000 acres) .......................................................................................................................................10 Byers Peak (10,200 acres)........................................................................................................................................12 Cache la Poudre Adjacent Area (3,200 acres)..........................................................................................................13 Cherokee Park (7,600 acres) ....................................................................................................................................14 Comanche Peak Adjacent Areas A - H (45,200 acres).............................................................................................15 Copper Mountain (13,500 acres) .............................................................................................................................19 Crosier Mountain (7,200 acres) ...............................................................................................................................20 Gold Run (6,600 acres) ............................................................................................................................................21 -
Description of the Telluride Quadrangle
DESCRIPTION OF THE TELLURIDE QUADRANGLE. INTRODUCTION. along the southern base, and agricultural lands water Jura of other parts of Colorado, and follow vents from which the lavas came are unknown, A general statement of the geography, topography, have been found in valley bottoms or on lower ing them comes the Cretaceous section, from the and the lavas themselves have been examined slopes adjacent to the snow-fed streams Economic Dakota to the uppermost coal-bearing member, the only in sufficient degree to show the predominant and geology of the San Juan region of from the mountains. With the devel- imp°rtance- Colorado. Laramie. Below Durango the post-Laramie forma presence of andesites, with other types ranging opment of these resources several towns of tion, made up of eruptive rock debris and known in composition from rhyolite to basalt. Pene The term San Juan region, or simply " the San importance have been established in sheltered as the "Animas beds," rests upon the Laramie, trating the bedded series are several massive Juan," used with variable meaning by early valleys on all sides. Railroads encircle the group and is in turn overlain by the Puerco and higher bodies of often coarsely granular rocks, such as explorers, and naturally with indefinite and penetrate to some of the mining centers of Eocene deposits. gabbro and diorite, and it now seems probable limitation during the period of settle- sa^juan the the interior. Creede, Silverton, Telluride, Ouray, Structurally, the most striking feature in the that the intrusive bodies of diorite-porphyry and ment, is. now quite. -
Abstracts, Posters and Program
Gold and Silver Deposits in Colorado Symposium Abstracts, posters And program Berthoud Hall, Colorado School of Mines Golden, Colorado July 20-24, 2017 GOLD AND SILVER DEPOSITS IN COLORADO SYMPOSIUM July 20-24, 2017 ABSTRACTS, POSTERS AND PROGRAM Principle Editors: Lewis C. Kleinhans Mary L. Little Peter J. Modreski Sponsors: Colorado School of Mines Geology Museum Denver Regional Geologists’ Society Friends of the Colorado School of Mines Geology Museum Friends of Mineralogy – Colorado Chapter Front Cover: Breckenridge wire gold specimen (photo credit Jeff Scovil). Cripple Creek Open Pit Mine panorama, March 10, 2017 (photo credit Mary Little). Design by Lew Kleinhans. Back Cover: The Mineral Industry Timeline – Exploration (old gold panner); Discovery (Cresson "Vug" from Cresson Mine, Cripple Creek); Development (Cripple Creek Open Pit Mine); Production (gold bullion refined from AngloGold Ashanti Cripple Creek dore and used to produce the gold leaf that was applied to the top of the Colorado Capital Building. Design by Lew Kleinhans and Jim Paschis. Berthoud Hall, Colorado School of Mines Golden, Colorado July 20-24, 2017 Symposium Planning Committee Members: Peter J. Modreski Michael L. Smith Steve Zahony Lewis C. Kleinhans Mary L. Little Bruce Geller Jim Paschis Amber Brenzikofer Ken Kucera L.J.Karr Additional thanks to: Bill Rehrig and Jim Piper. Acknowledgements: Far too many contributors participated in the making of this symposium than can be mentioned here. Notwithstanding, the Planning Committee would like to acknowledge and express appreciation for endorsements from the Colorado Geological Survey, the Colorado Mining Association, the Colorado Department of Natural Resources and the Colorado Division of Mine Safety and Reclamation. -
GIS and Geostatistical Analysis of the La Plata Mining District
GIS and Geostatistical Analysis of the La Plata Mining District David S. Schiowitz1, W. Scott White2, and Jeffrey A. Cary3 1GIS/CAD Specialist Bikis Water Consultants, LLC 555 RiverGate Lane, Suite B4-82 Durango, CO 81301 970-385-2340 [email protected] 2Associate Professor Department of Geosciences – Fort Lewis College 1000 Rim Drive Durango, CO 81301 970-247-7475 [email protected] 3Visiting Instructor Department of Geosciences – Fort Lewis College 1000 Rim Drive Durango, CO 81301 970-247-7620 [email protected] ABSTRACT The La Plata mining district is located in southwestern Colorado, and contains numerous gold, silver, and copper deposits. Geologic and structural data for the district was obtained from georeferencing and digitizing an historic geologic map. New stream sediment samples were collected at 41 locations throughout the area, and analyzed for metal concentrations. Using ArcGIS’s surface hydrologic modeling tools, individual watersheds were delineated upstream for each sediment sample location. A geodatabase has been created consisting of geologic formations and structures, veins, rock ages, historic mines, and geochemical anomalies associated with the 41 watersheds. The Spatial Analyst extension was used to analyze the data to aid in visualization and quantification of the relationships among geology, structure, and geochemistry. The results provide greater insight into regional geochemical domains of mineralization and in the modeling of spatial associations of known ore deposits within the mining district. 1 Introduction The objective of this project was to build a spatial database of structural, lithological, and geochemical data, so that a spatial model for gold exploration could be created. This model was created using the Fuzzy Logic Method developed by Graeme Bonham-Carter of the Geologic Survey of Canada, and Gary Reins of the USGS. -
Environmental Contaminant Exposure and Effects on Bats: Studies in Sichuan Province, China and Colorado, U.S.A
University of Northern Colorado Scholarship & Creative Works @ Digital UNC Dissertations Student Research 5-5-2017 Environmental Contaminant Exposure and Effects on Bats: Studies in Sichuan Province, China and Colorado, U.S.A. Laura Heiker Follow this and additional works at: https://digscholarship.unco.edu/dissertations Recommended Citation Heiker, Laura, "Environmental Contaminant Exposure and Effects on Bats: Studies in Sichuan Province, China and Colorado, U.S.A." (2017). Dissertations. 405. https://digscholarship.unco.edu/dissertations/405 This Text is brought to you for free and open access by the Student Research at Scholarship & Creative Works @ Digital UNC. It has been accepted for inclusion in Dissertations by an authorized administrator of Scholarship & Creative Works @ Digital UNC. For more information, please contact [email protected]. © 2017 LAURA HEIKER ALL RIGHTS RESERVED UNIVERSITY OF NORTHERN COLORADO Greeley, Colorado The Graduate School ENVIRONMENTAL CONTAMINANT EXPOSURE AND EFFECTS ON BATS: STUDIES IN SICHUAN PROVINCE, CHINA AND COLORADO, U.S.A. A Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Laura Heiker College of Natural and Health Sciences School of Biological Sciences Biological Education May 2017 This Dissertation by: Laura Heiker Entitled: Environmental Contaminant Exposure and Effects on Bats: Studies in Sichuan Province, China and Colorado, U.S.A. has been approved as meeting the requirements for the Degree of Doctor of Philosophy in College of Natural and Health Sciences in School of Biological Sciences, Program of Biological Education Accepted by the Doctoral Committee _______________________________________________________ Dr. Rick Adams, Ph.D., Research Advisor _______________________________________________________ Dr. Lauryn Benedict, Ph.D., Committee Member _______________________________________________________ Dr. -
The Proposed Montezuma Forest Reserve Colorado
THE PROPOSED MONTEZUMA FOREST RESERVE COLORADO ---- Examination, Report and Recommendations by Coert DuBois ---- Bureau of Forestry U. S. Department of Agriculture 1904 A facsimile of a copy acquired from the National Archives and Records Administration, Rocky Mountain Regional Office at Denver Federal Center December 2007 by David Bradford. 2 THE PROPOSED MONTEZUMA FOREST RESERVE, COLORADO ---- By Coert DuBois Forest Assistant, Forest Service ---- Location and Area The area included within the proposed Montezuma Forest Reserve lies in parts of San Miguel, Dolores, San Juan, La Plata, and Montezuma Counties in southwest Colorado, and includes the La Plata, Bear River, and San Miguel mountain ranges. The proposed boundaries include a total acreage of 570,260. Topography The mountains divide the area into three watersheds. On the north slope of the San Miguel Range are the headwaters of several small creeks which flow into the San Miguel River. The east slopes of the Bear River and La Plata Mountains are drained by Cascade, Hermosa, and Junction Creeks, all tributaries of the Animas River. The most important division is the drainage basin of the Mancos and Dolores Rivers, or the south and west slopes of the mountains. The heads of the Mancos River rise high up in the La Plata Mountains and consist of three forks fed by many smaller creeks, which join and form the main Mancos near the south boundary. A low mesa divides the waters of the Mancos from those of the Dolores. The Dolores River, the most important in the southwest part of the State, with the exception of the San Juan, has its sources in all three ranges, being fed by a great many mountain streams, the chief of which are the West Fork, Bear Creek, Beaver Creek, and Lost Canon Creek. -
Sore Feet, Happy Camper (Reprinted with Permission of the Colorado Society of Cpas.)
News from the Colorado Trail Foundation SUMMER 2011 Sore Feet, Happy Camper (Reprinted with permission of the Colorado Society of CPAs.) Even for Colorado’s outdoor enthusiasts, the phrase, In recent years, as he prepared to step away from his “I’m going for a hike,” probably means, at most, a several- position with CoBank, Jackson began hatching a plan to hour trip out and back in a single day. When Brian hike the entire Colorado Trail with a friend, Steve Staley, Jackson, goes out for a hike, he’ll see you in two months. a former work colleague and chairman of The Colorado A former CFO of CoBank and now a private investor Trail Foundation, the nonprofit organization that in Denver, Jackson set out in July 2010 to hike the famed maintains the trail. Colorado Trail, which runs from Durango to Denver, Jackson did extensive research to prepare. He and Staley covers just short of 500 miles, and includes 90,000 vertical nailed down the logistics for the trip over the course of feet of climbing. Clearly, it’s not your run-of-the-mill several months prior to their departure, using the official day trip. CT guidebook and maps. Planning each night’s camping around water availability was imperative. “You can carry six or seven days of food with you at a time,” Jackson says, but daily access to water is key. Once he combined his calculations about how much he could carry and the trail specifics, “it became pretty clear where we needed to stop each day.” Resupply came in mountain towns such as Silverton, Breckenridge, and Lake City. -
River Flowing from the Sunrise: an Environmental History of the Lower San Juan
Utah State University DigitalCommons@USU All USU Press Publications USU Press 2000 River Flowing from the Sunrise: An Environmental History of the Lower San Juan James M. Aton Robert S. McPherson Follow this and additional works at: https://digitalcommons.usu.edu/usupress_pubs Recommended Citation Aton, James M. and McPherson, Robert S., "River Flowing from the Sunrise: An Environmental History of the Lower San Juan" (2000). All USU Press Publications. 128. https://digitalcommons.usu.edu/usupress_pubs/128 This Book is brought to you for free and open access by the USU Press at DigitalCommons@USU. It has been accepted for inclusion in All USU Press Publications by an authorized administrator of DigitalCommons@USU. For more information, please contact [email protected]. River Flowing from the Sunrise An Environmental History of the Lower San Juan A. R. Raplee’s camp on the San Juan in 1893 and 1894. (Charles Goodman photo, Manuscripts Division, Marriott Library, University of Utah) River Flowing from the Sunrise An Environmental History of the Lower San Juan James M. Aton Robert S. McPherson Utah State University Press Logan, Utah Copyright © 2000 Utah State University Press all rights reserved Utah State University Press Logan, Utah 84322-7800 Manfactured in the United States of America Printed on acid-free paper 654321 000102030405 Library of Congress Cataloging-in-Publication Data Aton, James M., 1949– River flowing from the sunrise : an environmental history of the lower San Juan / James M. Aton, Robert S. McPherson. p. cm. Includes bibliographical references and index. ISBN 0-87421-404-1 (alk. paper) — ISBN 0-87421-403-3 (pbk. -
The Colorado Trail Foundation Fall Newsletter 2001
The Colorado Trail Foundation Fall Newsletter 2001 President’s Colorado Trail Reroutes It was a very busy summer on The Colorado Trail! The South Corner Platte reroute was completed, and the Copper Mountain reroute was almost completed. Both have been mapped with GPS units by Merle McDonald and can be viewed and/or printed out from any computer with a Web browser by going to Jerry Brown’s Bear Creek Survey Web CoHoCo/CTF Benefit Ride site, http://www.bearcreeksurvey.com/Reroutes.htm, and clicking The Colorado Horse Council/ on the small picture of the reroute at that site. The reroute will Colorado Trail Foundation print out as a 5 x 7 color picture in great detail. All future updates Benefit Horseback Ride took to the CT reference map series CD-ROM will be located at this place on the CT from Tennes- site first. From this same site you can pick up a couple of typo see Pass to Mt. Princeton the corrections to our CD-ROM map of The Colorado Trail. week of August 4 to 11. Twenty-four riders participated, and a donation of $2,350 to the CTF was the result. Clair Gamble, a longtime Friend of The ColoradoTrail, organized the ride. He and his friends Jim and Danielle Russell, Steve Cave,Tom Butterfield, and Dave Gaskill all provided the week-long volunteer support for the ride. (Thanks, Guys and Gals!) Suzanne Webel, Chair of the CoHoCo Trails Commit- tee, provided the organization from their end. Steve Hyde, the owner of Clear Creek Ranch One of the boardwalks completed by Crew 1101 as part of the Copper Mountain Resort (the ranch on the south side reroute.