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Geologic Map of the Central San Juan Caldera Cluster, Southwestern Colorado by Peter W
Geologic Map of the Central San Juan Caldera Cluster, Southwestern Colorado By Peter W. Lipman Pamphlet to accompany Geologic Investigations Series I–2799 dacite Ceobolla Creek Tuff Nelson Mountain Tuff, rhyolite Rat Creek Tuff, dacite Cebolla Creek Tuff Rat Creek Tuff, rhyolite Wheeler Geologic Monument (Half Moon Pass quadrangle) provides exceptional exposures of three outflow tuff sheets erupted from the San Luis caldera complex. Lowest sheet is Rat Creek Tuff, which is nonwelded throughout but grades upward from light-tan rhyolite (~74% SiO2) into pale brown dacite (~66% SiO2) that contains sparse dark-brown andesitic scoria. Distinctive hornblende-rich middle Cebolla Creek Tuff contains basal surge beds, overlain by vitrophyre of uniform mafic dacite that becomes less welded upward. Uppermost Nelson Mountain Tuff consists of nonwelded to weakly welded, crystal-poor rhyolite, which grades upward to a densely welded caprock of crystal-rich dacite (~68% SiO2). White arrows show contacts between outflow units. 2006 U.S. Department of the Interior U.S. Geological Survey CONTENTS Geologic setting . 1 Volcanism . 1 Structure . 2 Methods of study . 3 Description of map units . 4 Surficial deposits . 4 Glacial deposits . 4 Postcaldera volcanic rocks . 4 Hinsdale Formation . 4 Los Pinos Formation . 5 Oligocene volcanic rocks . 5 Rocks of the Creede Caldera cycle . 5 Creede Formation . 5 Fisher Dacite . 5 Snowshoe Mountain Tuff . 6 Rocks of the San Luis caldera complex . 7 Rocks of the Nelson Mountain caldera cycle . 7 Rocks of the Cebolla Creek caldera cycle . 9 Rocks of the Rat Creek caldera cycle . 10 Lava flows premonitory(?) to San Luis caldera complex . .11 Rocks of the South River caldera cycle . -
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. -
Affected Bighorn Sheep Herds S-22 San Luis Peak Sub-Herd
On June 25th and 26th 2012, Seth Ratering USFS Range Tech, Doug Clark USFS Wildlife Tech, and Kevin Suellentrop USFS Wildlife Tech, inspected Table Mountain, Snow Mesa and the Ouray Sheep allotments. The intent of the visit was to locate bighorn sheep, collect bighorn scat, to get familiar with the allotments, and also to check on the ground conditions. No bighorn sheep were spotted during this visit although they are known to be present. We did collect one sample of possible bighorn sheep scat. Determining whether or not the scat was in fact bighorn sheep was difficult due to high population of elk and deer, who also had scattered scat in the whole area. The drought conditions are extremely evident around the whole area, especially above treeline where contact with moisture was limited. Bog sedge (Kobresia myosuroides) was extremely dry and showed very little recent production. It appears it produced early and was able to go to seed, but is now almost completely browned (photo 1). Various forbs are also very unproductive. The only available water on these high mesas is in the lakes and kettles and the few boggy areas (photo 2). During our visit, the mornings did not even produce dew on the vegetation. The east side of the Miners pasture will not be used this year. Instead, the Ouray allotment will be used in the beginning of the grazing season. This allotment has not been used for a number of seasons and shows signs of needing some disturbance. The amount of residual plant matter is beginning to hamper plant vigor in areas of high production. -
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. -
Description of the Silver City Quadrangle
DESCRIPTION OF THE SILVER CITY QUADRANGLE. By Sidney Paige. INTRODUCTION. The individual ranges, such as the Dragoon, Chiricahua, Pinalino, Mountain ranges of northern New Mexico. Its appearance is that of Galiuro, Santa Catalina, Tortilla, Final, Superstition, Ancha, and an upthrust of pre-Cambrian rocks, flanked on both sides by Paleozoic GENERAL RELATIONS OF THE QUADRANGLE. Mazatzal mountains, rarely exceed 50 miles in length or 8,000 rocks dipping away from the core. The extreme southwest corner of New Mexico embraces a part of a The Silver City quadrangle is bounded by meridians 108° feet in altitude. * * * Their general trend * * * near the Mexican border * * * becomes more nearly north and south, province foreign to the Territory as a whole that of the Arizona and 108° 30' and parallels 32° 30' and 33° and includes one- and the mountain zone as a whole coalesces with a belt of north-south desert ranges, numerous and small, trending northward and separated fourth of a "square degree" of the earth's surface, an area, in ranges which extends northward through New Mexico and borders by desert basins. That these ranges are post-Cretaceous admits of that latitude, of 1,003 square miles. It is in southwestern New the Plateau region on the east. little doubt. Probably they were outlined during the same early Mexico (see fig. 1) and almost wholly in Grant County, but Tertiary deformation that produced the ranges of the Rio Grande along the east half of its south side it includes a narrow strip The northward-trending ranges, such as the Peloncillo, valley. -
Summits on the Air – ARM for USA - Colorado (WØC)
Summits on the Air – ARM for USA - Colorado (WØC) Summits on the Air USA - Colorado (WØC) Association Reference Manual Document Reference S46.1 Issue number 3.2 Date of issue 15-June-2021 Participation start date 01-May-2010 Authorised Date: 15-June-2021 obo SOTA Management Team Association Manager Matt Schnizer KØMOS Summits-on-the-Air an original concept by G3WGV and developed with G3CWI Notice “Summits on the Air” SOTA and the SOTA logo are trademarks of the Programme. This document is copyright of the Programme. All other trademarks and copyrights referenced herein are acknowledged. Page 1 of 11 Document S46.1 V3.2 Summits on the Air – ARM for USA - Colorado (WØC) Change Control Date Version Details 01-May-10 1.0 First formal issue of this document 01-Aug-11 2.0 Updated Version including all qualified CO Peaks, North Dakota, and South Dakota Peaks 01-Dec-11 2.1 Corrections to document for consistency between sections. 31-Mar-14 2.2 Convert WØ to WØC for Colorado only Association. Remove South Dakota and North Dakota Regions. Minor grammatical changes. Clarification of SOTA Rule 3.7.3 “Final Access”. Matt Schnizer K0MOS becomes the new W0C Association Manager. 04/30/16 2.3 Updated Disclaimer Updated 2.0 Program Derivation: Changed prominence from 500 ft to 150m (492 ft) Updated 3.0 General information: Added valid FCC license Corrected conversion factor (ft to m) and recalculated all summits 1-Apr-2017 3.0 Acquired new Summit List from ListsofJohn.com: 64 new summits (37 for P500 ft to P150 m change and 27 new) and 3 deletes due to prom corrections. -
Pikes Peak Massif
Wild Connections Conservation Plan for the Pike & San Isabel National Forests Chapter 5 – Complexes: Area-Specific Management Recommendations This section contains our detailed, area-specific proposal utilizing the theme based approach to land management. As an organizational tool, this proposal divides the Pike-San Isabel National Forest into eleven separate Complexes, based on geo-physical characteristics of the land such as mountain ranges, parklands, or canyon systems. Each complex narrative provides details and justifications for our management recommendations for specific areas. In order to emphasize the larger landscape and connectivity of these lands with the ecoregion, commentary on relationships to adjacent non-Forest lands are also included. Evaluations of ecological value across public and private lands are used throughout this chapter. The Colorado Natural Heritage Programs rates the biodiversity of Potential Conservation Areas (PCAs) as General Biodiversity, Moderate, High, Very High, and Outranking Significance. The Nature Conservancy assesses the conservation value of its Conservation Blueprint areas as Low, Moderately Low, Moderate, Moderately High and High. The Southern Rockies Ecosystem Project's Wildlands Network Vision recommends land use designations of Core Wilderness, Core Agency, Low and Moderate Compatible Use, and Wildlife Linkages. Detailed explanations are available from the respective organizations. Complexes – Summary List by Watershed Table 5.1: Summary of WCCP Complexes Watershed Complex Ranger District -
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. -
Colorado Topographic Maps, Scale 1:24,000 This List Contains The
Colorado Topographic Maps, scale 1:24,000 This list contains the quadrangle names and publication dates of all Colorado topographic maps published at the scale of 1:24,000 by the U.S. Geological Survey (USGS). One, non-circulating copy of each map is held in the Map Room Office. The Library does not own maps labeled "lacking." The maps are sorted alphabetically by sheet name. Colorado 1:24,000 Topos -- A Abarr 1974 printed 1977 Abarr SE 1968 printed 1971 1968 (without color) printed 1971 Abeyta 1971 printed 1974 1971 (without color) printed 1974 Adams Lake 1974 printed 1978 (dark), 1978 (light) 1974 (without color) printed 1978 1987 printed 1988 Adena 1963 printed 1965, 1975 1963 (without color) printed 1965 1984 printed 1984 1984 (without color) printed 1984 Adler Creek 1968 printed 1971 1968 (without color) printed 1971 Adobe Downs Ranch, New Mexico-Colorado 1963 printed 1965 1963 (without color) printed 1965 1979 printed 1980 (dark), 1980 (light) Adobe Springs 1969 printed 1972, 1992 1969 (without color) printed 1972 Agate 1970 printed 1973 (dark), 1973 (light) 1970 (without color) printed 1973 Agate Mountain 1983 printed 1983 1994 printed 1998 Aguilar 1971 printed 1974 1971 (without color) printed 1974 Akron 1973 printed 1976 1973 (without color) printed 1976 Akron SE 1973 printed 1976 Akron SW 1973 printed 1976 Alamosa East 1966 printed 1968, 1975 1966 (without color) printed 1968 Alamosa West 1966 printed 1969, 1971 1966 (without color) printed 1969 Aldrich Gulch 1957 printed 1958, 1964, 1975 (dark), 1975 (light) 1957 (without color) -
July 15Th – Pikes Peak Group Program
July 2014 | No. 203 July 15th – Pikes Peak Group Program Jes Meiris Presents: Big wall speed climbing on El Capitan Please join us in welcoming Jes Meiris to the monthly program Her passions include climbing big walls in alpine style, of the CMC’s Pikes Peak Group at 7:30 p.m. on July 15th in the mountain biking, hiking, playing piano, and snow sports. All Souls Unitarian Church, 730 N. Tejon St. Personal climbing adventures have yielded ascents in Squamish BC, Yosemite CA, Red Rocks NV, Smith Rocks OR, the Cascades, and Colorado's Rocky Mountains to name a few. With climbing partner Quinn Brett, she held the women's speed record on the Nose of El Capitan (10 hours, 19 minutes, on June 10, 2012), and just a couple of days ago reclaimed the record. Come hear about the history, the training for climbing almost four thousand vertical feet, the mental challenges, and bringing all the elements together for a successful climb. Jes is a Colorado native whose passion for the outdoors was kindled at a very young age. After living on both coasts and a few places in between, she made her home in Colorado Springs during the winter months. She coaches a competitive climbing team for Fountain Valley School, leads both indoor and outdoor technical skills clinics, and works as a At the monthly presentation Jes will discuss valuable lessons professional model. During the summer she travels regionally, she has learned through climbing and guiding, including her guiding rock climbing and mountain biking trips. In addition, speed ascent of the Nose on El Capitan. -
APPENDIX a APPENDIX a Tiliber SALE Sumllary
APPENDIX A APPENDIX A TIliBER SALE SuMllARY Area r.ocarmn -“anagemenr Area Treatmentl Esrlmated Probable Harvest -RIS I.ocatmn Area Volume “ethods by -Towashw & Range* (Acres) m LlpiBF Forest Type 1984 leadvllle 28 30 57 02 lodgepole pine 100210 clearcut T9S, R80W 1984 Leadvllle 2B 30 86 03 Lodgepole pne 100210 clearcut T8S. mow 1984 Leadvllle 70 50 143 03 bdgepole pule 100203 clearcur; spruce,fr ms, R80W shelterwood 1984 Leadvllle lhstrxt-vlde 80 2.29 08 All species. approprrare for nanagement Area.*=C 1984 Sahda 4B 320 457 16 Spruce,flr group 101001; 101002 selectmn T14S, R80W 1984 Sallda 40 200 114 0.4 Douglas-*rr thmnmg; 102311 lodgepole pine and T48N, WE aspen. clearcur 1984 SalIda 5B 15 29 0 1 Lodgepole pm 102211 clearcur T49N, R7E 1984 Salzda 5B 30 86 0.3 Aspen: clearcut 1027.06 public fuelwood T49N, WE 1984 Sahd.9 40 25 86 0.3 Aspen clearcur 101301 public fuelwood T13S, R77W 1984 Sahda District-wide 320 200 0.7 All species approprrate for nanagement Area 1984 San Carlas ,A 318 loo0 3.5 Spruce,fx. clearcut; 103510 Douglas-fir: two-step T24S, R69W sheltewood 1984 San carkss rhstrzct-wrde 420 257 0.9 All Epecles appropriate for Management Area 1984 Pxkes Peak WE 314 143 0.3 Ponderosa pine and 115302. 113303 Douglas-cr. Two-step TI1S. R68W shelterwad; spruce/ fm and aspen clearcut 1984 PlkS Peak 7A 476 286 10 Douglas-fm and 117101, 117102, ponderosa pme two- 117401, 11,402 step shelterwood, T11 s; 12s. wow aspen. clearcur *All Townshq and Range ~~rar~ons refer to the New “exzco and Sxcth Prmcxpal “enduas, ““Ifed States survey “See Chapter III, Management Area Preserqrmns for harvest methods by specks A-l TIMBER SALE SuMEwlY Area hcatlo” -Managemn Area Treatment Estmated Probable Harverr Hlscal -RI8 locatloo Area Yolme Methods by Year: District Sale Name -Township 6 Ranae (Acres) gcJ MMBF Forest Type 1984 Pikes Peak .Jobos Gulch 1OR 450 286 I.0 Poaderosa pm.e 116701, 116002 two-step shelterwood T118, R69” 1984 Pikes Peak Quaker RLdgs 28 250 143 0.5 Ponderoaa pme TWO- 116601. -
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.......................................................