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By Douglas P. Klein with Plates by G.A. Abrams and P.L. Hill U.S. Geological Survey, Denver, Colorado
U.S DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY STRUCTURE OF THE BASINS AND RANGES, SOUTHWEST NEW MEXICO, AN INTERPRETATION OF SEISMIC VELOCITY SECTIONS by Douglas P. Klein with plates by G.A. Abrams and P.L. Hill U.S. Geological Survey, Denver, Colorado Open-file Report 95-506 1995 This report is preliminary and has not been edited or reviewed for conformity with U.S. Geological Survey editorial standards. The use of trade, product, or firm names in this papers is for descriptive purposes only, and does not imply endorsement by the U.S. Government. STRUCTURE OF THE BASINS AND RANGES, SOUTHWEST NEW MEXICO, AN INTERPRETATION OF SEISMIC VELOCITY SECTIONS by Douglas P. Klein CONTENTS INTRODUCTION .................................................. 1 DEEP SEISMIC CRUSTAL STUDIES .................................. 4 SEISMIC REFRACTION DATA ....................................... 7 RELIABILITY OF VELOCITY STRUCTURE ............................. 9 CHARACTER OF THE SEISMIC VELOCITY SECTION ..................... 13 DRILL HOLE DATA ............................................... 16 BASIN DEPOSITS AND BEDROCK STRUCTURE .......................... 20 Line 1 - Playas Valley ................................... 21 Cowboy Rim caldera .................................. 23 Valley floor ........................................ 24 Line 2 - San Luis Valley through the Alamo Hueco Mountains ....................................... 25 San Luis Valley ..................................... 26 San Luis and Whitewater Mountains ................... 26 Southern -
Cenozoic Thermal, Mechanical and Tectonic Evolution of the Rio Grande Rift
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 91, NO. B6, PAGES 6263-6276, MAY 10, 1986 Cenozoic Thermal, Mechanical and Tectonic Evolution of the Rio Grande Rift PAUL MORGAN1 Departmentof Geosciences,Purdue University,West Lafayette, Indiana WILLIAM R. SEAGER Departmentof Earth Sciences,New Mexico State University,Las Cruces MATTHEW P. GOLOMBEK Jet PropulsionLaboratory, CaliforniaInstitute of Technology,Pasadena Careful documentationof the Cenozoicgeologic history of the Rio Grande rift in New Mexico reveals a complexsequence of events.At least two phasesof extensionhave been identified.An early phase of extensionbegan in the mid-Oligocene(about 30 Ma) and may have continuedto the early Miocene (about 18 Ma). This phaseof extensionwas characterizedby local high-strainextension events (locally, 50-100%,regionally, 30-50%), low-anglefaulting, and the developmentof broad, relativelyshallow basins, all indicatingan approximatelyNE-SW •-25ø extensiondirection, consistent with the regionalstress field at that time.Extension events were not synchronousduring early phase extension and were often temporally and spatiallyassociated with major magmatism.A late phaseof extensionoccurred primarily in the late Miocene(10-5 Ma) with minor extensioncontinuing to the present.It was characterizedby apparently synchronous,high-angle faulting givinglarge verticalstrains with relativelyminor lateral strain (5-20%) whichproduced the moderuRio Granderift morphology.Extension direction was approximatelyE-W, consistentwith the contemporaryregional stress field. Late phasegraben or half-grabenbasins cut and often obscureearly phasebroad basins.Early phase extensionalstyle and basin formation indicate a ductilelithosphere, and this extensionoccurred during the climax of Paleogenemagmatic activity in this zone.Late phaseextensional style indicates a more brittle lithosphere,and this extensionfollowed a middle Miocenelull in volcanism.Regional uplift of about1 km appearsto haveaccompanied late phase extension, andrelatively minor volcanism has continued to thepresent. -
Plan for the Recovery of Desert Bighorn Sheep in New Mexico 2003-2013
PLAN FOR THE RECOVERY OF DESERT BIGHORN SHEEP IN NEW MEXICO 2003-2013 New Mexico Department of Game and Fish August 2003 Executive Summary Desert bighorn sheep (Ovis canadensis mexicana) were once prolific in New Mexico, occupying most arid mountain ranges in the southern part of the state. Over-hunting, and disease transmission from livestock are 2 primary reasons for the dramatic decline in bighorn sheep numbers throughout the west during the early 1900s. In 1980, desert bighorn were placed on New Mexico’s endangered species list. From 1992-2003, approximately 25% of bighorn were radiocollared to learn causes of mortality driving this species towards extinction. Approximately 85% of all known-cause non-hunter killed radiocollared individuals have been killed by mountain lions. Despite the lack of a native ungulate prey base in desert bighorn range, mountain lion populations remain high, leading to the hypothesis that mountain lions are subsidized predators feeding on exotic ungulates, including cattle. Lack of fine fuels from cattle grazing have resulted in a lack of fire on the landscape. This has lead to increased woody vegetation which inhibits bighorn’s ability to detect and escape from predators. Bighorn numbers in spring 2003 in New Mexico totaled 213 in the wild, and 91 at the Red Rock captive breeding facility. This is in spite of releasing 266 bighorn from Red Rock and 30 bighorn from Arizona between 1979 and 2002. Several existing herds of desert bighorn likely need an augmentation to prevent them from going extinct. The presence of domestic sheep and Barbary sheep, which pose risks to bighorn from fatal disease transmission and aggression, respectively, preclude reintroduction onto many unoccupied mountain ranges. -
U.S. Department of the Interior U.S. Geological Survey
U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Prepared in cooperation with New Mexico Bureau of Mines and Mineral Resources 1997 MINERAL AND ENERGY RESOURCES OF THE MIMBRES RESOURCE AREA IN SOUTHWESTERN NEW MEXICO This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Cover: View looking south to the east side of the northeastern Organ Mountains near Augustin Pass, White Sands Missile Range, New Mexico. Town of White Sands in distance. (Photo by Susan Bartsch-Winkler, 1995.) MINERAL AND ENERGY RESOURCES OF THE MIMBRES RESOURCE AREA IN SOUTHWESTERN NEW MEXICO By SUSAN BARTSCH-WINKLER, Editor ____________________________________________________ U. S GEOLOGICAL SURVEY OPEN-FILE REPORT 97-521 U.S. Geological Survey Prepared in cooperation with New Mexico Bureau of Mines and Mineral Resources, Socorro U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Mark Shaefer, Interim Director For sale by U.S. Geological Survey, Information Service Center Box 25286, Federal Center Denver, CO 80225 Any use of trade, product, or firm names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government MINERAL AND ENERGY RESOURCES OF THE MIMBRES RESOURCE AREA IN SOUTHWESTERN NEW MEXICO Susan Bartsch-Winkler, Editor Summary Mimbres Resource Area is within the Basin and Range physiographic province of southwestern New Mexico that includes generally north- to northwest-trending mountain ranges composed of uplifted, faulted, and intruded strata ranging in age from Precambrian to Recent. -
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. -
Bulletin 39: the Metal Resources of New Mexico and Their Economic
BULLETIN 3 9 The Metal Resources of New Mexico and Their Economic Features Through 1954 A revision of Bulletin 7, by Lasky and Wootton, with detailed information for the years 1932-1954 BY EUGENE CARTER ANDERSON 1957 STATE BUREAU OF MINES AND MINERAL RESOURCES NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY CAMPUS STATION SOCORRO, NEW MEXICO NEW MEXICO INSTITUTE OF MINING & TECHNOLOGY E. J. Workman, President STATE BUREAU OF MINES AND MINERAL RESOURCES Alvin J. Thompson, Director THE REGENTS MEMBERS EX OFFICIO THE HONORABLE EDWIN L. MECHEM………...Governor of New Mexico MRS. GEORGIA L. LUSK ......................Superintendent of Public Instruction APPOINTED MEMBERS ROBERT W. BOTTS ....................................................................Albuquerque HOLM O. BURSUM, JR. .....................................................................Socorro THOMAS M. CRAMER .................................................................... Carlsbad JOHN N. MATHEWS, JR. ...................................................................Socorro RICHARD A. MATUSZESKI ......................................................Albuquerque Contents Page INTRODUCTION .......................................................................................................... 1 Purpose and Scope of Bulletin ..................................................................................... 1 Other Reports Dealing With the Geology and Mineral Resources of New Mexico ...................................................................................................... -
Space-Time Patterns of Late Cretaceous to Present Magmatism in New Mexico--Comparison with Andean Volcanism and Potential for Fu
NEW MEXICO BUREAU OF GEOLOGY & MINERAL RESOURCES, BULLETIN 160, 2004 13 Spacetime patterns of Late Cretaceous to present magmatism in New Mexico—comparison with Andean volcanism and potential for future volcanism New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, Socorro, NM 87801Charles E. Chapin, Maureen Wilks, and William C. McIntosh Abstract Spacetime plots of more than 3000 KAr and 40Ar/39Ar radioisotopic ages of Late Cretaceous and Cenozoic volcanic and plutonic rocks are used to evaluate the evolution of magmatism in New Mexico. Several tectonomagmatic subdivisions can be seen in the data. These are: (1) Late Cretaceous to middle Eocene (75–45 Ma) magmatism occurred along and to the south of the northeasttrending Santa Rita lineament which marked the southern boundary of the wellknown Laramide magma gap; (2) following the major decrease in Farallon–North America convergence at about 45 Ma, andesitic volcanism engulfed the southwestern quarter of New Mexico to form the intermediatecomposition basal onehalf to twothirds of the Mogollon–Datil volcanic field and spread eastward into the Sierra Blanca field; (3) at 37–36 Ma, the ignimbrite “flareup” began from TransPecos Texas to central Colorado concurrently with a change in mafic volcanism and the first signs of regional extension; (4) the maximum areal extent of magmatism occurred in the Oligocene as activity spread along the nas cent Rio Grande rift and in a minor way into the four corners of the state; (5) magmatism waned -
Stratigraphy of the San Andres Mountains in South-Central New Mexico Frank E
New Mexico Geological Society Downloaded from: http://nmgs.nmt.edu/publications/guidebooks/26 Stratigraphy of the San Andres Mountains in south-central New Mexico Frank E. Kottlowski, 1975, pp. 95-104 in: Las Cruces Country, Seager, W. R.; Clemons, R. E.; Callender, J. F.; [eds.], New Mexico Geological Society 26th Annual Fall Field Conference Guidebook, 376 p. This is one of many related papers that were included in the 1975 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. -
Precambrian Rocks of South-Central New Mexico
NEW MEXICO GEOLOGICAL SOCIETY • SIXTH FIELD CONFERENCE • SOUTH-CENTRAL NEW MEXICO PRECAMBRIAN ROCKS OF SOUTH-CENTRAL NEW MEXICO This paper, which describes briefly the Pre- quartz-mica schist, and quartzite. In some places an cambrian rocks of the region in which the Sixth older granite intruded into this series has been con- Field Conference of the New Mexico Geological Soci- verted to gneiss. Locally unmetamorphosed" basic ety is to be held, is essentially a review of published igneous rocks are intruded into the older rocks. The literature, and is intended to provide basic informa- youngest and one of the most widespread of the Pre- tion for more extensive and detailed investigations. cambrian rocks is a coarse-grained white or pink The literature describing the Precambrian rocks of granite with associated pegmatite, aplite, and lam- New Mexico is not voluminous and, but for a few prophyric dikes." exceptions, is limited to the location and petrology Stark and Dapples (1946) examined the Precam- of the Precambrian rocks and their associated min- brian rocks of the Los Pinos Mountains of north- eral deposits. More extensive studies have been made eastern Socorro County and summarized their de- by Kelley and Silver (1952) , Kuellme • (1954) , Mont- scription as follows : gomery (1953) , and Stark and Dapples (1946) , and "The pre-Cambrian core, the area of greatest from their works some conception of Precambrian relief, is composed of the Sais quartzite (oldest) , problems in New Mexico can be gained. Toward this Blue Springs muscovite schist (originally siltstones) , end comment upon their work is made. White Ridge quartzite, and Sevilleta rhyolite, all intruded by the Los Pinos (pre-Cambrian) granite. -
KIVA INDEX: Volumes 1 Through 83
1 KIVA INDEX: Volumes 1 through 83 This index combines five previously published Kiva indexes and adds index entries for the most recent completed volumes of Kiva. Nancy Bannister scanned the indexes for volumes 1 through 60 into computer files that were manipulated for this combined index. The first published Kiva index was prepared in 1966 by Elizabeth A.M. Gell and William J. Robinson. It included volumes 1 through 30. The second index includes volumes 31 through 40; it was prepared in 1975 by Wilma Kaemlein and Joyce Reinhart. The third, which covers volumes 41 through 50, was prepared in 1988 by Mike Jacobs and Rosemary Maddock. The fourth index, compiled by Patrick D. Lyons, Linda M. Gregonis, and Helen C. Hayes, was prepared in 1998 and covers volumes 51 through 60. I prepared the index that covers volumes 61 through 70. It was published in 2006 as part of Kiva volume 71, number 4. Brid Williams helped proofread the index for volumes 61 through 70. To keep current with our volume publication and the needs of researchers for on-line information, the Arizona Archaeological and Historical Society board decided that it would be desirable to add entries for each new volume as they were finished. I have added entries for volumes 71 through 83 to the combined index. It is the Society's goal to continue to revise this index on a yearly basis. As might be expected, the styles of the previously published indexes varied, as did the types of entries found. I changed some entries to reflect current terminology. -
Whitewater Baldy Complex Burned Area Emergency Response (BAER) Team Executive Summary
6/18/2012 Whitewater Baldy Complex Burned Area Emergency Response (BAER) Team Executive Summary Glenwood, Reserve, Black Range, and Wilderness Ranger Districts Gila National Forest Silver City, New Mexico June 18, 2012 1 6/18/2012 Executive Summary Introduction In May and June of 2012, the Whitewater Baldy Complex burned approximately 290,000 acres (117,359 hectares) of the Glenwood, Reserve, Wilderness, and Black Range Ranger Districts of the Gila National Forest. The Fire started as two separate lightning strike fires near Mogollon Baldy and in the headwaters of Whitewater Creek in the Gila Wilderness east of Glenwood NM. The two fires joined in extreme fire behavior on 5/23/2012 to form the Whitewater Baldy Complex. The fire severely burned a large tract of land across the Gila National Forest and the Gila Wilderness, including the headwaters of Whitewater Creek, Mineral Creek, and Gilita Creek that drain directly into the communities of Glenwood, Alma, and Willow Creek respectively. All of these population centers are situated in the floodplains of drainages affected by the fire. Much of the vegetation, duff and soil that once served to slow and hold water were eliminated as a result of the fire. Steep slopes further aggravate the situation. In fact, the Whitewater Baldy Complex Fire BAER team has modeled and predicted post-fire peak flows for a 25 year 6 hour precipitation event at 140 times the pre-fire flow in Willow Creek. Post-fire flows from a 25 year precipitation event are expected to increase 2-4 times in most of the affected drainages. -
NEW MEXICO WILDERNESS YO! What’S with the ALLIANCE Main Office Spotted Kitty? 505/843-8696 • Fax 505/843-8697 [email protected] • P.O
www.nmwild.org NEW MEXICO WILDERNESS YO! What’s with the ALLIANCE Main Office Spotted Kitty? 505/843-8696 • fax 505/843-8697 [email protected] • www.nmwild.org P.O. Box 25464 ince we went with our new masthead, Albuquerque, NM 87125 we have received many inquiries about 202 Central Avenue, SE • Suite 101 Albuquerque, NM 87102 the big, wild cat gracing the left-hand corner of our front page: Las Cruces Field Office 275 N. Downtown Mall S “Why do you have an African animal for Las Cruces, NM 88001 505/527-9962 your mascot?” Mission Statement “We don’t have cheetahs in New Mexico. The New Mexico Wilderness Alliance is dedicated Who are you trying to kid?” to the protection, restoration, and continued enjoyment of New Mexico’s wild lands and “I hope that big cat eats all you wacko Wilderness areas. greenies” NMWA Staff Las Cruces Office And our personal fave: “Yo! What’s with the Greta Balderrama, Grassroots Organizer spotted kitty?” Albuquerque Office Tisha Broska, Membership Coordinator Well, that “spotted kitty” is a jaguar. Steve Capra, Associate Director Panthera onca. El tigre del Norte. Nathan Newcomer, Grassroots Organizer Roxanne Pacheco, Finance Manager And not an African import, but a native Jim Scarantino, Executive Director Michael Scialdone, Director of Wilderness Protection New Mexican. Jaguars have been in New Board of Directors Mexico so long they probably know what Dave Parsons, Chair, Albuquerque, NM happened at Chaco Canyon. Tom Mouck, Treasurer, Albuquerque, NM Nancy Morton, Secretary, Albuquerque, NM Jaguars once ranged far north into New Pam Eaton, Denver, CO Mexico, and beyond into southern Colorado Panthera Onca Dave Foreman, Albuquerque, NM Randall Gray, Lake Valley, NM and Utah.