DOCSLIB.ORG

Enterprise Zone, Southwestern Utah: Implications for Initiation of a Major Miocene Transfer Zone

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Enterprise Zone, Southwestern Utah: Implications for Initiation of a Major Miocene Transfer Zone Paleomagnetic results from the eastern Caliente- Enterprise zone, southwestern Utah: Implications for initiation of a major Miocene transfer zone Michael S. Petronis1,*, Daniel K. Holm2, John W. Geissman3, David B. Hacker2, and Billie J. Arnold2 1Environmental Geology, Natural Resource Management Department, New Mexico Highlands University, Las Vegas, New Mexico 87701, USA 2Department of Geology, Kent State University, Kent, Ohio 44242, USA 3Department of Geosciences, University of Texas at Dallas, ROC 21, 800 West Campbell Road, Richardson, Texas 75080-3021, USA ABSTRACT large and statistically signifi cant. For exam- defi ne the CEZ after Axen (1998) as the region ple, site P-18 from the Bauers Tuff yields an encompassing all transverse structures whether The Miocene Caliente-Enterprise zone R = –61.1° ± 5.3° and F = –0.6° ± 5.0°. Rela- or not they include evidence for counterclock- (CEZ) in southwestern Utah (USA) is a tive to the expected Miocene direction, in situ wise vertical axis rotation. Displacement trans- 20–50-km-wide east-northeast–trending left- paleomagnetic data from the Iron Axis lac- fer systems, or accommodation zones, are often lateral transfer zone that displaces north- coliths, specifi cally the Three Peaks laccolith, subvertical fault systems that transfer displace- south–trending crustal blocks of the eastern yield a mean that is discordant in declination, ment from one region of the crust to another Basin and Range Province to the west. Pre- with estimated R = –22.2° and F = –8.8° val- (Moustafa, 1976; Bosworth, 1985, 1986; Lister vious paleomagnetic results from the central ues. These rotation and fl attening estimates, et al., 1986; Rosendahl, 1987; Chapin, 1989; and western CEZ show signifi cant counter- although consistent with the overall data set Faulds et al., 1990; Faulds and Varga, 1998). clockwise vertical axis rotations of strike- from volcanic rocks, must be considered of Transfer zones accommodate or partition strain slip–bounded fault blocks, and these rotation lesser quality, as we are unable to accurately into areas of heterogeneous extension, and often estimates vary in magnitude both across and correct these data for possible effects of local are not simple strike-slip or oblique-slip fault along the strike of the zone. Results of recent tilting. If the rotation estimate is viable, then systems, but tend to be associated with diffuse detailed geologic mapping and new geo- we suggest that this component of deforma- belts of magmatism and, at times, signifi cant chrono logic data in the area east of previous tion involves much of the upper crust, and vertical axis rotation of fault-bound structural studies allow us to extend paleomagnetic stud- we furthermore propose that the boundary blocks (Faulds and Varga, 1998; Hudson et al., ies into the easternmost CEZ. New paleomag- of the eastern CEZ extends farther east than 1998; Petronis et al., 2002, 2007, 2009). The netic results include data from 4 regionally previously envisioned, to within a few kilome- CEZ is a sinistral transfer zone that has under- extensive latest Oligocene to early Miocene ters of the breakaway with the Colorado Pla- gone vertical axis rotation of spatially vari- (ca. 24–22 Ma) ignimbrite sheets and from 3 teau. The transitional zone between the east- able, yet systematic magnitudes (Hudson et al., ca. 22–20 Ma Iron Axis laccoliths. These data ern CEZ and Colorado Plateau is therefore 1998). Emplaced within the CEZ are numerous reveal signifi cant magnitudes and similar spa- abrupt and occurs within a narrow zone near 22–20 Ma laccoliths of the Iron Axis magmatic tially variable components of counterclock- Cedar City, Utah. province, a northeast-trending igneous feature wise vertical axis rotation. Rotation estimates in southwestern Utah characterized by several from the ignimbrites are assessed relative to INTRODUCTION early Miocene laccolithic intrusions, including what we interpret to be a nonrotated to only the Pine Valley megalaccolith and extensive minimally rotated reference section just north Since the middle Cenozoic, continental litho- latest Oligocene to earliest Miocene regional of the Colorado Plateau (Grass Valley) and spheric extension in the southwestern United ignimbrites (Hacker et al., 1996, 1999; Axen, from several low-extension areas in southeast States has resulted in the relative westward 1998). Previous paleomagnetic studies in the Nevada. Accepted tilt-corrected paleomag- transport of crustal material away from unex- CEZ concentrated on rocks from the central netic data from sites away from the reference tended stable crust of the Colorado Plateau and western part of its extent, predominantly areas are discordant in declination from the (Fig. 1). In general, the transition zone separat- because those areas were already mapped (Hud- expected individual ash-fl ow tuff directions, ing the extended and unextended regions trends son et al., 1998). This study focuses on the more with rotation (R) and fl attening (F) estimates north-south; however, in southwestern Utah the recently mapped areas to the east and southeast that range from R = –2° to –84° and F = +15° transition zone swings nearly 90° and trends (Hurlow, 2002; Rowley et al., 2006; Biek et al., to –14°. Many of the rotation estimates are roughly east-west, forming a major displace- 2009). We report paleomagnetic data from late ment transfer system known as the Caliente- Oligocene and Miocene volcanic and intrusive *Corresponding author e-mail: mspetro@ nmhu Enterprise zone (CEZ) (Anderson and Mehnert, rocks from the eastern CEZ, which is the area .edu. 1979; Hudson et al., 1998; Fig. 2A). Here we thought to record the earliest phase of deforma- Geosphere; June 2014; v. 10; no. 3; p. 534–563; doi:10.1130/GES00834.1; 14 fi gures; 5 tables. Received 11 June 2012 ♦ Revision received 26 August 2013 ♦ Accepted 2 April 2014 ♦ Published online 25 April 2014 534 For permission to copy, contact [email protected] © 2014 Geological Society of America Downloaded from http://pubs.geoscienceworld.org/gsa/geosphere/article-pdf/10/3/534/3333171/534.pdf by guest on 01 October 2021 Paleomagnetic results from the eastern Caliente-Enterprise zone, SW Utah active during vertical axis rotation, resulting in 118W 114W as much as 45°–85° of counterclockwise rota- tion, as evidenced by paleomagnetic data from Northern Basin the volcanic rocks in the area (Hudson et al., and Range Provence 1998). The central section of the CEZ overlaps the Caliente caldera complex, the eruption his- 40N tory of which lasted from ca. 23 to 12 Ma. The Caliente caldera is centered in eastern Nevada; UTAH the eastern edge of the caldera extends to within CALIFORNIA NEVADA 25 km of Enterprise, Utah. Early eruptions appear to have occurred before major exten- Sierra Nevada sion to the north or south during the Miocene, whereas the latter part of the caldera’s activ- CEZ ity occurred coincident with large-magnitude San Andreas Fault extension and detachment faulting to the north and south (Axen, 1998). The western section Central Basin of the CEZ is defi ned by the Pahranagat fault and Range Provence Colorado Plateau 36N zone (Tschanz and Pampeyan, 1970), which is composed of three northeast-striking sinistral ARIZONA faults and includes the area north of the fault. Southern Basin Pacific Ocean These faults have been interpreted to accommo- and Range Provence date varying degrees of extension that was trans- ferred from the Dry Lake Valley–Delamar Val- ley area to the Desert Valley west of the Sheep Range, where discrete faults of the system end Figure 1. Simplifi ed map of the central part of the western United (Liggett and Ehrenspeck, 1974; Wernicke et al., States showing the major tectonic provinces in the northern Basin 1984; Hudson et al., 1998). Areas north of the and Range Province. The trace of the San Andreas fault (dashed Pahranagat fault zone were also shown by Hud- line) is after Stewart (1988). CEZ—Caliente-Enterprise zone. Star son et al. (1995, 1998) to have rotated >15° represents the approximate location of the southern Delamar– counterclockwise. Meadow Valley Mountains and Condor Canyon reference areas. This area provides reference locations to base vertical axis rotation STRATIGRAPHY, LACCOLITHS, estimates for the Harmony Hills and Bauers Tuffs. AND GEOCHRONOLOGY Ignimbrite Stratigraphy tion within the zone (Hacker, 1998). New paleo- the early Miocene. This has been interpreted magnetic data from the eastern part of the CEZ to refl ect increased crustal ductility beneath the Cenozoic volcanic rocks, dominated by allow us to assess the amount and variation of zone as the result of the ca. 23–12 Ma magma- Oligo cene to Miocene ash-fl ow tuffs and lava vertical axis rotation where the CEZ interacts tism within the Caliente caldera complex (Hud- fl ows, as well as intrusive rocks, are abundant with the Iron Axis laccolith province along the son et al., 1998), in addition to the extension that and well exposed in southeastern Nevada and western margin of the Colorado Plateau and to occurred to the north of the adjacent Colorado southwestern Utah. The volcanic stratigraphy better defi ne the eastern extent of the zone. Plateau during the middle Miocene to Holocene of the eastern segment of the CEZ is, in part, (Axen, 1998). Two episodes of major Miocene the result of Iron Axis magmatic activity that GEOLOGIC SETTING to Holocene extension probably occurred north produced an assortment of ash-fl ow tuffs, lava of the CEZ and led to the current arrangement fl ows, and allochthonous gravity slide masses The CEZ trends east-northeast across the of basins and ranges. To the south, the Mio- related to the rapid emplacement and subsequent approximately north-south structural grain of the cene to Holocene extensional history was high- eruption of some of the Iron Axis laccoliths eastern Basin and Range Province for ~220 km lighted by a single, large-magnitude extensional (Hacker, 1998; Hacker et al., 2002).
Load more

Recommended publications
  • Helping Wild Lands Heal
    FRIENDS OF NEVADA WILDERNESS Keeping Nevvvada Wild Since 1984 WINTER 2005 Wilderness stewardship enters a new phase Helping Wild Lands Heal By Brian Beffort Because wilderness designation does not guaran- Wilderness Restoration tee landscapes will remain free of human impacts, In coordination with the BLM, we have sched- invasive plant species and other threats, Friends of uled wilderness restoration trips to help wildlands Nevada Wilderness is committed to working on the heal from impacts. These trips get volunteers out to ground to ensure a wilderness legacy for the future. wildlands, where they can enjoy the area’s beauty We accomplish this with our three Wilderness and help restore damaged habitat. Friends and the Stewardship programs: Adopt A Wilder- BLM will also be offering a series of Leave No ness, Leave No Trace and Wilderness Trace trips, to teach people how to travel Restoration. We invite you to become a Adopt a lightly on the land. Often these trips in- “Wilderness Warrior” and join us in the wilderness clude an opportunity to camp in the wild wild. Not only will you help us achieve today, and with other fun and like-minded volun- results on the ground, but you’ll meet teers. There’s often work for all skill and other dedicated wilderness defenders help keep ability levels. The only essential qualifica- and get to know wild Nevada. Nevada tion you need is a passion for wilderness. wild. A schedule of projects is listed below. Adopt A Wilderness Nevada is a big state with a lot of wilderness- Leave No Trace Happy quality lands, and there simply aren’t enough of us Developed over decades by National Outdoor Birthday here at Friends of Nevada Wilderness to keep tabs Leadership School and the Leave No Trace Center on all wild lands.
    [Show full text]
  • Conservation Management Strategy Coyote Springs Desert Wildlife Management Area
    Conservation Management Strategy Coyote Springs Desert Wildlife Management Area Clark County, Nevada February 2007 EXECUTIVE SUMMARY The Mojave Desert population of desert tortoises has been declining since the 1970s and was declared threatened under the Federal Endangered Species Act (ESA) in 1990. Impacts of urban growth, agriculture, recreation, and other human activities—coupled with the rise of predators and disease—are thought to be the major causes of tortoise decline. Over the past 16 years, several attempts to define and implement specific Conservation Actions (CAs), strategies, and plans have been proposed to protect the tortoise and other species considered imperiled. Clark County and the U.S. Fish and Wildlife Service (USFWS) entered into the Multiple Species Habitat Conservation Plan (MSHCP) as a binding commitment to protect 78 species, including the tortoise, by providing a commitment to implement specific CAs. Subsequent to the MSHCP, a site-specific conservation management strategy (CMS) is required for each of four areas in Clark County known as Desert Wildlife Management Areas (DWMAs). The intent of the CMS is to guide management actions and to unite federal, state, and local agencies in coordinated, adaptive management for each DWMA. This document is a CMS for the Coyote Springs DWMA, which encompasses the Desert National Wildlife Refuge, Coyote Springs Investment, and Coyote Springs area of critical environmental concern (ACEC), and is almost entirely preferred desert tortoise habitat of creosote- bursage vegetation on gentle plains and bajadas. Along its northern boundary, a large residential and resort development has the potential to impact conservation efforts. Construction of roads and utility rights-of-way (ROWs), as well as increased human activity, may introduce serious threats to the future viability of desert tortoise populations in the DWMA.
    [Show full text]
  • Coyote Spring Valley Hydrographic Basin 13-210
    STATE OF NEVADA DEPARTMENT OF CONSERVATION AND NATURAL RESOURCES DIVISION OF WATER RESOURCES TIM WILSON, P.E. STATE ENGINEER COYOTE SPRING VALLEY HYDROGRAPHIC BASIN 13-210 GROUNDWATER PUMPAGE INVENTORY CALENDAR YEAR 2019 Field Investigated by: Christi Cooper Report Prepared by: Christi Cooper TABLE OF CONTENTS Page ABSTRACT .................................................................................................................................... 1 HYDROGRAPHIC BASIN SUMMARY ...................................................................................... 2 PURPOSE AND SCOPE ................................................................................................................ 3 DESCRIPTION OF THE STUDY AREA ..................................................................................... 3 GROUNDWATER LEVELS ......................................................................................................... 3 METHODS TO ESTIMATE PUMPAGE ...................................................................................... 4 TABLES ......................................................................................................................................... 5 FIGURES ........................................................................................................................................ 6 APPENDIX A. COYOTE SPRING VALLEY 2019 GROUNDWATER PUMPAGE BY APPLICATION NUMBER. ............................................................................................. 10 APPENDIX B. COYOTE
    [Show full text]
  • Hydrogeology and Potential for Ground-Water Development, Carbonate-Rock Aquifers, Southern Nevada and Southeastern California
    Hydrogeology and Potential for Ground-Water Development, Carbonate-Rock Aquifers, Southern Nevada and Southeastern California By Thomas J. Burbey U.S. GEOLOGICAL SURVEY Water-Resources Investigations 95-4168 Prepared in cooperation with the STATE OF NEVADA Carson City, Nevada 1997 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY GORDON P. EATON, Director Any use of trade names in this publication is for descriptive purposes only and does not constitute endorsement by the U.S. Government For additional information Copies of this report can be write to: purchased from: District Chief U.S. Geological Survey U.S. Geological Survey Branch of Information Services 333 West Nye Lane, Room 203 Box 25286 Carson City, NV 89706-0866 Denver, CO 80225-0286 email: [email protected] CONTENTS Abstract.........................................................................................................................._^ 1 Introduction ....................................................................................................................................... 1 Purpose and Scope .................................................................................................................................................... 2 Hydrogeology of Southern Nevada ........................................................................................................................... 2 Acknowledgments.................................................................................................^^ 6 Potential
    [Show full text]
  • The Nevada Mining Association's Lincoln County Wilderness Study
    The Nevada Mining Association’s Lincoln County Wilderness Study Area Position Paper A Review of Wilderness Study Areas in Lincoln County Nevada. Part: 1 Lincoln County Land Use Patterns Part: 2 Individual WSA’s EXHIBIT E1 Wilderness Document consists of 72 pages. ; Entire document provided. 1 Due to size limitations, only three panels are provided. A copy of the complete document is available through the Research Library (775/684-6827) or e-mail [email protected]). Meeting Date: 01-23-04 Lincoln County L L NMA L L NMA CLOVER MOUNTAINS WILDERNESS STUDY AREA 1. THE STUDY AREA - 84,935 acres The Clover Mountains WSA (NV-050-139) is located in southern Lincoln County, Nevada, approximately twelve miles south of Caliente, Nevada, in the western Clover Mountains. The WSA contains 84,935 acres of BLM land with no split estate lands or private inholdings. Along the southwest side, from the intersection of Pennsylvania Canyon and Meadow Valley Wash southerly, the boundary is formed by the Union Pacific Railroad tracks or the adjoining access road, whichever is more easterly, except for a tract of private land. At the private land, the boundary is formed by a combination of the private land and the access road. The southern boundary is formed by extending a line easterly from the midline of Section 3, T.8S., R.67E., approximately along a ridgeline, to the approximate center of Section 4, T.8S., R.68E., at map elevation 4,671'. From there the line extends southeasterly, point to point, to the northern slopes of Garden Mountain, thence northerly and easterly across the lower slopes of the Clover Mountains, point to point, to a point about one mile north of Sam's Camp Well.
    [Show full text]
  • Revised Geologic Cross Sections of Parts of the Colorado, White River, and Death Valley Regional Groundwater Flow Systems, Nevada, Utah, and Arizona
    Prepared in cooperation with the National Park Service Revised Geologic Cross Sections of Parts of the Colorado, White River, and Death Valley Regional Groundwater Flow Systems, Nevada, Utah, and Arizona By William R. Page, Daniel S. Scheirer, Victoria E. Langenheim, and Mary A. Berger Open-File Report 2006–1040 Revised June, 2011 U.S. Department of the Interior U.S. Geological Survey NCA - 000543 U.S. Department of the Interior KEN SALAZAR, SECRETARY U.S. Geological Survey Marcia K. McNutt, Director U.S. Geological Survey, Denver, Colorado, 2011 Revised June, 2011 For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Suggested citation: Page, W.R., Scheirer, D.S., Langenheim, V.E., and Berger, M.A., 2011, Revised geologic cross sections of parts of the Colorado, White River, and Death Valley regional groundwater flow systems, Nevada, Utah, and Arizona: U.S. Geological Survey Open-File Report 2006–1040, Denver, CO, 80225. 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 material contained within this report. NCA - 000544 Contents Abstract ........................................................................................................................................................
    [Show full text]
  • Of Spring Valley, White Pine County, Nevada
    Effects of Groundwater Transport from Cave, Delamar, and Dry Lake Valleys on Terrestrial Ecosystems of Lincoln and adjacent Nye and White Pine Counties, Nevada 12 November 2007 David Charlet, Ph.D. Professor of Biology College Southern Nevada Henderson NV 89002 Location and Physical Setting Cave, Delamar, and Dry Lake Valleys are large, high, dry valleys in southeastern Nevada (Figure 1). Collectively, the valleys are about 10-15 km from west to east throughout most of their 170 km north to south length. The valleys are topographically connected, and run parallel to and east of the White River and Pahranagat Valleys. The North and South Pahroc Ranges and the Hiko Range separate Delamar and Dry Lake Valleys from the White River and Pahranagat Valleys. The southern tip of the Egan Range separates Cave Valley from the White River Valley. The system lies mainly within Lincoln County, except for portions of western Cave Valley which extends into Nye County and northern Cave Valley, which extends into White Pine County, Nevada. Cave, Delamar, and Dry Lake Valleys are like most Nevada valleys in that they trend from north to south and are situated between mountain ranges. These valleys are considerably higher than those to west, and like those to the west, are progressively lower from north to south (Table 1). Few springs flow in these valleys. In Delamar Valley, aside from water that accumulates at the playa, the nearest free-flowing water is 8 km from the valley floor and 500m in elevation above in the Delamar Mountains at Jumbo Springs. The water from a few springs in the mountains around Dry Lake Valley is diverted to tiny reservoirs at valley low points in the south (Point of Rocks Reservoir) and in the north (Bullfrog Reservoir).
    [Show full text]
  • 2011-2012 Official Highway Map Highway 21 3 Wells (1,515)
    to SUSANVILLE 78 mi. to PYRAMID LAKE 23 mi. to PYRAMID LAKE 18 mi. to TONOPAH 189 mi. to ST GEORGE 98 mi. LAKE TAHOE REGION 2 445 Snow Desert National Wildlife Range 0246810 mi Peavine Spanish Springs Mtn 95 Peak LEMMON Airport Indian El 8266 4 Road Conditions 5 RenoStead 6 445 Reservation Floyd Lamb 04 812 16 km Airport EAGLE Park Phone (Toll Free)............................ DR 5 3 C Nellis A RD 2 3 N RD LEMMON 4 2 Y 1.3 100 106 O Air Force DR BLVD N Outside Nevada.....................(877) NVROADS RED ROCK RD ECHO AVE 425 2 Sparks VALLEY Base 58 (877) 687- 6237 3 KYLE CANYON10 North TAHOE WY 98 DR GRAND 1.2 Las Vegas Verdi TETON R Web Site............................www.nvroads.com Mogul BLVD 157 D 3 to FERNLEY 17 mi. LEAR AI 1 River BLVD 12.8 395 BLVD BELTW Stampede MILITARY ELKHORN 215 AY Reno T WY 93 r 1.7 to QUINCY 53 mi. Reservoir uc e LA POSADA DR Las Vegas Dunes Radio Frequencies 4 Reno-Tahoe k e HUALAP 12 54 6.4 604 MOYA DURANGO S Airport RD P 3 PKWY E BLVD E Recreation Lands Carson City ........................................1610 AM NATIONAL 7 ALIANTE CENTENNIAL PKWY DW TEYANA NORTHERN A 6 1 CENTENNIAL 52 Y 103 BLV 2 BLVD PABCO Lake Tahoe...........................................530 AM ST RD 11 VD 10.3 D Verdi Peak 395 STEAD BLVD ANN RD BL Las Vegas Las Vegas ..........................................1610 AM El 8444 ANN RD Independence to SUSANVILLE 72 mi. Motor HUMBOLDT- HOLLYWOOD BLVD STOREY 2.3 H O Lake 89 SIERRA WASHOE PACIFIC IG RD Reno ....................................................530 AM N VIR H DR N Speedway Nellis 32 NION 10 mi.
    [Show full text]
  • Fingerprints in the Great Basin
    Fingerprints in The Great Basin Great Fingerprints in The T he Nellis Air Force Base Regional Obsidian Sourcing Study Base Regional Obsidian Sourcing he Nellis Air Force FFingerprintsingerprints inin TheThe GreatGreat BasinBasin The Nellis Air Force Base Regional Obsidian Sourcing Study and Wagner Haarklau, Johnson, 2005 Fingerprints In The Great Basin: The Nellis Air Force Base Regional Obsidian Sourcing Study by Lynn Haarklau Lynn Johnson and David L. Wagner with contributions by Richard E. Hughes Craig E. Skinner Jennifer J. Thatcher and Keith Myhrer January 2005 Cover Illustration: Design: Sandra L. Hannum Background: Southwest face of Obsidian Butte, Nevada. Photo courtesy of Lynn Haarklau. Insert: Detail of Ishi manufacturing an Obsidian hunting point, from Hunting with a Bow and Arrow by S. T. Pope, page 34, Sylvan Toxophilite Classics, 2000. Research and publication of this book were funded by the U.S. Army Corps of Engineers, Fort Worth District, under contract DACA63-00-D-0006. Printed in the United States of America at Morgan Printing, Austin, Texas. January 2005 ii TABLE OF CONTENTS ACKNOWLEDGMENTS .................................................................................................................xi GLOSSARY ...................................................................................................................................... xii CHAPTER 1: PURPOSE AND RESEARCH DESIGN Keith Myhrer and Lynn Haarklau ....................................................................... 1 The Nellis Mission..............................................................................................................
    [Show full text]
  • Biological Resources for Cave, Dry Lake, and Delamar Valleys
    Biological Resources for Cave, Dry Lake, and Delamar Valleys PRESENTATION TO THE OFFICE OF THE NEVADA STATE ENGINEER Prepared by November 2007 Biological Resources for Cave, Dry Lake, and Delamar Valleys CONTENTS List of Figures. ii List of Tables. iii List of Acronyms and Abbreviations . iv 1.0 Introduction. 1 2.0 Groundwater Project Federal Environmental Compliance. 2 3.0 Biological Studies . 3 4.0 Environmental Setting . 6 4.1 Cave Valley. 6 4.1.1 Federal and State Sensitive Species and Sensitive Habitats. 8 4.2 Dry Lake Valley . 10 4.2.1 Federal and State Sensitive Species and Sensitive Habitats. 11 4.3 Delamar Valley . 13 4.3.1 Federal and State Sensitive Species and Sensitive Habitats. 15 5.0 Potential Effects to Sensitive Species and Habitats from Groundwater Pumping . 16 5.1 Cave Valley. 16 5.2 Dry Lake Valley . 17 5.3 Delamar Valley . 17 6.0 Conclusion . 19 7.0 References. 20 i Biological Resources for Cave, Dry Lake, and Delamar Valleys FIGURES NUMBER TITLE PAGE 1 Overview of Cave, Dry Lake, and Delamar Valleys . 7 2 Cave Valley . 9 3 Cave Spring . 10 4 Dry Lake Valley . 12 5 Coyote Spring Trough . 13 6 Delamar Valley. 14 7 Grassy Spring . 15 ii Biological Resources for Cave, Dry Lake, and Delamar Valleys TABLES NUMBER TITLE PAGE 5-1 Sensitive Environmental Areas, Listed by Valley . 16 iii Biological Resources for Cave, Dry Lake, and Delamar Valleys ACRONYMS BA Biological Assessment BLM Bureau of Land Management BO Biological Opinion DRI Desert Research Institute EIS Environmental Impact Statement ESA Endangered Species Act GBBO Great Basin Bird Observatory GWD Groundwater Development HA hydrographic area NDOW Nevada Department of Wildlife NEPA National Environmental Impact Statement NNHP Nevada Natural Heritage Program POD point of diversion ROW right-of-way SNWA Southern Nevada Water Authority USFWS U.S.
    [Show full text]
  • HUNTER INFORMATION SHEET MULE DEER Area 24, Units 241, 242, 243, 244, 245
    HUNTER INFORMATION SHEET MULE DEER Area 24, Units 241, 242, 243, 244, 245 LOCATION: Southern Lincoln County. See unit description in the big game brochure. ELEVATION: 4,500 ft. south of Panaca to 8,022 ft. at Badger Mtn. (Pahranagat Range). TERRAIN: Variable. Bench lands around the valleys to moderately high mountain peaks. VEGETATION: Sagebrush in lower valleys, cultivated alfalfa fields around Meadow Valley and down through Rainbow Canyon (Meadow Valley Wash) to pinyon/juniper, oak, some aspen and ponderosa pine at the upper elevations in the Clover Mountains. Pinyon/juniper and various species of mountain/desert brush in the Delamar and Pahranagat Ranges. LAND STATUS: The majority of lands within this management area are public lands administered by the Bureau of Land Management. Private lands are mostly associated with agriculture lands in Meadow Valley Wash (Rainbow Canyon) and along the Union Pacific Railroad along Clover and Meadow Valley Creeks. HUNTER ACCESS: Good throughout the management area. Off-road vehicles are recommended when traveling away from the county roads. Note: Please be aware that sections Unit 241, Unit 242, Unit 244 and Unit 245 are in wilderness areas. Motorized equipment, mechanized transport, including wheeled game carriers and chainsaws, are prohibited in wilderness areas. Contact the Federal Management Agency responsible for this area for more information. MAP REFERENCES: Topographical maps are available from the U.S. Geological Survey and possibly from B.L.M. local offices and sporting good stores. The 1:100 000 topographical maps that cover this management area are: Caliente, Nevada-Utah; Clover Mountains, Nevada- Utah; Timpahute Range, Nevada; Pahranagat Range, Nevada.
    [Show full text]
  • Geologic Map of the Meadow Valley Mountains, Uncoln and Clark Counties, Nevada
    U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY GEOLOGIC MAP OF THE MEADOW VALLEY MOUNTAINS, UNCOLN AND CLARK COUNTIES, NEVADA By E.H. Pampeyan ...... (j, MISCELLANEOUS INVESTIGATIONS SERIES 0 0 Published by the U.S. Geological Survey, 1993 0 0 U.S. DEPARTMENT OF THE INTERIOR TO ACCOMPANY MAP 1-2173 U S. GEOLOGICAL SURVEY GEOLOGIC MAP OF THE MEADOW VALLEY MOUNTAINS, LINCOLN AND CLARK COUNTIES, NEVADA by Earl H. Pampeyan INTRODUCTION Valley, and from Arrow Canyon Range to the south by Nevada Highway 168. The map area is bounded on the The Meadow Valley Mountains are located in Lincoln northwest by Nevada Highway 317 in Kane Springs and Clark Counties, southern Nevada, in the southern Valley (a narrow alluviated drainage area commonly referred part of the Basin and Range province. They lie east of to as Kane Springs Wash), on the east by Meadow Valley the interior drainage of the Great Basin and are in the Wash, and on the north by a dirt road connecting Nevada Colorado River drainage system. The center of the range Highway 317 with Lyman Crossing in Meadow Valley Wash. is about 103 km north-northeast of Las Vegas (fig. 1). The terrain is hilly to rugged with steep bedrock scarps on the The range is separated from the Mormon Mountains on west side and sharply incised gentle to moderately inclined the east and Clover Mountains on the north by Meadow alluviated slopes on the east side. The highest point is an unnamed ridge near the center of the range that stands 1, 759 Valley Wash, from the Delamar Mountains to the m above sea level, 853 m above the adjacent floor of Kane northwest by Kane Springs Wash, from the Sheep Range Springs Wash.
    [Show full text]