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Utah Geological Association Publication 30.Pub
Utah Geological Association Publication 30 - Pacific Section American Association of Petroleum Geologists Publication GB78 239 CENOZOIC EVOLUTION OF THE NORTHERN COLORADO RIVER EXTEN- SIONAL CORRIDOR, SOUTHERN NEVADA AND NORTHWEST ARIZONA JAMES E. FAULDS1, DANIEL L. FEUERBACH2*, CALVIN F. MILLER3, 4 AND EUGENE I. SMITH 1Nevada Bureau of Mines and Geology, University of Nevada, Mail Stop 178, Reno, NV 89557 2Department of Geology, University of Iowa, Iowa City, IA 52242 *Now at Exxon Mobil Development Company, 16825 Northchase Drive, Houston, TX 77060 3Department of Geology, Vanderbilt University, Nashville, TN 37235 4Department of Geoscience, University of Nevada, Las Vegas, NV 89154 ABSTRACT The northern Colorado River extensional corridor is a 70- to 100-km-wide region of moderately to highly extended crust along the eastern margin of the Basin and Range province in southern Nevada and northwestern Arizona. It has occupied a criti- cal structural position in the western Cordillera since Mesozoic time. In the Cretaceous through early Tertiary, it stood just east and north of major fold and thrust belts and also marked the northern end of a broad, gently (~15o) north-plunging uplift (Kingman arch) that extended southeastward through much of central Arizona. Mesozoic and Paleozoic strata were stripped from the arch by northeast-flowing streams. Peraluminous 65 to 73 Ma granites were emplaced at depths of at least 10 km and exposed in the core of the arch by earliest Miocene time. Calc-alkaline magmatism swept northward through the northern Colorado River extensional corridor during early to middle Miocene time, beginning at ~22 Ma in the south and ~12 Ma in the north. -
The Muddy Creek Formation: Depositional Environment, Provenance, and Tectonic Significance in the Western Lake Mead Area, Nevada and Arizona
UNLV Retrospective Theses & Dissertations 1-1-1997 The Muddy Creek Formation: Depositional environment, provenance, and tectonic significance in the western Lake Mead area, Nevada and Arizona Allan J. Scott University of Nevada, Las Vegas Follow this and additional works at: https://digitalscholarship.unlv.edu/rtds Repository Citation Scott, Allan J., "The Muddy Creek Formation: Depositional environment, provenance, and tectonic significance in the western Lake Mead area, Nevada and Arizona" (1997). UNLV Retrospective Theses & Dissertations. 9. http://dx.doi.org/10.25669/0x4k-0xfx This Thesis is protected by copyright and/or related rights. It has been brought to you by Digital Scholarship@UNLV with permission from the rights-holder(s). You are free to use this Thesis in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s) directly, unless additional rights are indicated by a Creative Commons license in the record and/ or on the work itself. This Thesis has been accepted for inclusion in UNLV Retrospective Theses & Dissertations by an authorized administrator of Digital Scholarship@UNLV. For more information, please contact [email protected]. INFORMATION TO USERS The most advanced technology has been used to photo graph and reproduce this manuscript from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The quality of this reproduction is dependent upon the quality of the copy submitted. -
Lake Mead National Recreation Area (N.R.A.), Burro Management, Clark
This is a reproduction of a library book that was digitized by Google as part of an ongoing effort to preserve the information in books and make it universally accessible. https://books.google.com DES 94-32 DRAFT ENVIRONMENTAL IMPACT STATEMENT" BURRO MANAGEMENT ‘ I May 1994 TRANSPORTATION LIBRARY JUN 30 ‘NORTHWESTERN UNIVERSITY Lake Mead Ncmonoll Recreation Area NATIONAL PARK SERVICE - U.S. DEPARTMENT OF THE INTERIOR .. tI".|,,",Il\\,\I'l TTT\TTTTTT\TTTTTTTTT 5556 03 UNITED STATES DEPARTMENT OF THE INTERIOR TRANSPORTATION LIBRARY NATIONAL PARK SERVICE DRAFT ENVIRONMENTAL IMPACT STATEMENT JUN 30 FOR BURRO MANAGEMENT \‘ORTHWESTERN UT‘H'T’ER (1) HY LAKE MEAD NATIONAL RECREATION AREA Clark County, Nevada, and Mohave County, Arizona Lead Agency: Department of the Interior, National Park Service, Western Region Cooperating Agencies: Department of the Interior, Bureau of Land Management, Nevada and Arizona Description of Action: This plan proposes the management of burros within Lake Mead National Recreation Area, Clark County, Nevada, and Mohave County, Arizona in such a manner as to comply with preservation goals and management policies of the National Park Service and Lake Mead NRA. The plan proposes to establish burro free areas within the park and to accept a certain amount of burro use in areas according to National Park Service prescriptions. The plan also proposes no range expansion or new use by burros, removal of burros from areas where they pose a resource threat or public safety hazard, and fencing sections of the park as opportunities arise. Summary of Environmental Impact and Adverse Environmental Effects: The adverse impacts to the ecosystems by feral burros would be eliminated or reduced to allow the recovery of park resources and to minimize or prevent burros from interfering with natural processes and the perpetuation of natural features and native species. -
Geohydrologic Reconnaissance of Lake Mead National Recreation Area Las Vegas Wash to Virgin River, Nevada by R.L
Geohydrologic Reconnaissance of Lake Mead National Recreation Area Las Vegas Wash to Virgin River, Nevada By R.L. LANEY and J.T. BALES U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 96 4033 Prepared in cooperation with the NATIONAL PARK SERVICE Tucson, Arizona 1996 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Gordon P. Eaton, Director For additional information Copies of this report can be write to: purchased from: District Chief U.S. Geological Survey U.S. Geological Survey Open-File Section Water Resources Division Box 25286, MS 517 375 South Euclid Avenue Denver Federal Center Tucson, AZ 85719-6644 Denver, CO 80225 CONTENTS Abstract ....................................................................................................................................................... Introduction................................................................................................................................................... l Acknowledgments....................................... .. ....................................................................................... 3 Rock units and their water-bearing characteristics .... .. .... ........ .... ........ .... .. .... .. .... .. .... .. ...... .... .. .... .. .. ... .. .... .. .. 3 Paleozoic and Mesozoic sedimentary rocks, undifferentiated .. .. ...... .. .... .. .. .. .. ......... ... .. .. .. .. .. ... .. .. .. .. .. 5 Horse Spring Formation...................................................................................................................... -
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 ........................................................................................................................................................ -
Discover Lake Mead from the Norht
National Park Service Lake Mead U.S. Department of the Interior National Recreation Area Discover... Lake Mead National Recreation Area from the North If you are exploring Lake Mead Wildlife observation camping, hiking and exploring National Recreation Area from View bald eagles and golden among the red rock formations. the north here are some special eagles perched on the clif There is a visitor center that is places to discover in your own tops of the Overton Arm during open daily with exhibits on backyard! the winter months. Bring your geology, ecology, history and binoculars! culture of the area. From I-15, take exit 93 through Logandale and Overton, Nevada. Hiking Go south on state route 169 into Hike one of many trails along the park. There are fees for Lake Northshore Road. Begin at the Mead NRA and Valley designated trailheads, on back- of Fire State Park. country roads or venture cross country to experience Lake Mead Rogers Spring National Recreation Area’s Relax in Rogers Spring after a wilderness areas. Summer hiking day of hiking in the park. Picnic is not recommended. tables, shade and primitive rest- rooms are available. Echo Bay Fishing Located near the spectacular Largemouth bass, stripers and Northshore Road Valley of Fire State Park visitors bluegill are just some of the Take a scenic drive along North- can launch watercraft at the Echo sport fsh found in the shore Road to view the scenery Bay launch ramp and enjoy the Overton Arm. Fish from the the Mojave Desert has to ofer. clear, warm waters of Lake Mead. -
Colemanite in Clark County, Nevada
COLEMANITE IN CLARK COUNTY, NEVADA. By L. F. NOBLE. INTRODUCTION. Some deposits of colemanite (hydrous calcium borate, probably HCa(B02) 3-f2H20), a mineral that yields borax, have recently been discovered in the Muddy Mountains, Clark County, Nev., in two areas 12 miles apart. One area occupies a part of the moun tains that is known locally as White Basin; the other lies near Call- ville Wash. The White Basin district contains several deposits; the Callville district, so far as known, contains a single deposit, which, however, is by far the largest in the region. The location of the deposits is shown on the accompanying map (fig. 3). These newly discovered deposits are interesting not only because they are the first economic occurrence of colemanite found outside of California, but because, unlike the -California deposits, they occur in rocks whose structure is relatively simple. The large Callville deposit and the inclosing rocks for hundreds of feet above and below it are magnificently exposed, and the deposit itself is regular and persistent over several thousand feet of outcrop. These natural conditions afford an exceptional opportunity to study the origin of the colemanite. The colemanite in all the deposits occurs in bunchy layers inter- bedded with whitish shale or thin-bedded limestone that forms part of a series of stratified rocks known as the Horse Spring formation. This formation, which consists of limestone, shale, sandstone, and conglomerate and contains much volcanic ash, is! of fresh-water origin and is probably of Miocene age. Some parts of the formation contain deposits of gypsum and magnesite. -
Jocelyn Torres Written Testimony
Written Statement for the Record Jocelyn Torres Senior Field Director, Conservation Lands Foundation Senate Energy and Natural Resources Committee’s Public Lands, Forests, and Mining Subcommittee June 16, 2021 Chair Cortez Masto, Ranking Member Lee, and members of the Subcommittee, thank you for this opportunity to testify today in support of S. 567, the Southern Nevada Economic Development and Conservation Act and S. 609, the Ruby Mountains Protection Act. My name is Jocelyn Torres, and I am the Senior Field Director for the Conservation Lands Foundation. Our mission is to protect, restore and expand the public lands vital for the health of our planet and communities. Our mission is something very near and dear to my heart. Having grown up in Las Vegas, Nevada, the ancestral lands of the Southern Paiute people, you can imagine that there weren’t a ton of recreational activities available to those of us under 21 years of age - that is with the exception of our public lands. I spent countless hours hiking, camping and soaking in the sun with my family and friends, and annually made the journey north to the Ruby Mountains for a family hunting trip. For years, Nevada’s public lands have taken care of me, my loved ones and my community. I’m here today to ask you to preserve our most valuable resource by enhancing protections for places, such as Red Rock Canyon National Conservation Area, the Desert National Wildlife Refuge and the Ruby Mountains, because when we take care of our public lands, they take care of us. -
Paleo-Fluid Flow and Deformation in the Aztec Sandstone at the Valley of Fire, Nevada—Evidence for the Coupling of Hydrogeolog
Paleo-fl uid fl ow and deformation in the Aztec Sandstone at the Valley of Fire, Nevada—Evidence for the coupling of hydrogeologic, diagenetic, and tectonic processes Peter Eichhubl† W. Lansing Taylor‡ David D. Pollard Atilla Aydin Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305-2115, USA ABSTRACT of structural heterogeneities for focused fl uid in southeastern Nevada. The Aztec Sandstone fl ow in a porous sandstone aquifer. has undergone multiple episodes of deforma- Paleo-fl uid fl ow conditions are recon- tion and diagenetic alteration including the structed for an exhumed faulted and frac- Keywords: fl uid fl ow, sandstone, hematite, precipitation, dissolution, and remobilization tured sandstone aquifer, the Jurassic Aztec diagenesis, deformation, thrust. of iron oxides and hydroxides. These oxida- Sandstone at Valley of Fire, Nevada. This tion and reduction reactions provide a record of reconstruction is based on detailed map- INTRODUCTION paleo-fl uid fl ow that is readily identifi able in the ping of multicolored alteration patterns that fi eld, allowing the spatial reconstruction of fl ow resulted from syndepositional reddening of Understanding the spatial and temporal distri- migration pathways and fl ow direction. Based the eolian sandstone and repeated episodes of bution of fl uid fl ow in the subsurface is of funda- on crosscutting relations with structural fea- dissolution, mobilization, and reprecipitation mental importance to the successful management tures, we demonstrate that the timing and focus- of iron oxide and hydroxide. A fi rst stage of of groundwater and hydrocarbon resources. In ing of fl uid fl ow across this sandstone unit was bleaching and local redeposition of hematite addition, the interaction of formation fl uids with strongly infl uenced by deformation and tectonic is attributed to upward migration of reduc- the hydrosphere and atmosphere is of increas- processes. -
Student Pages: Nevada Bighorn Sheep: on the Edge?
Student Pages: Nevada Bighorn Sheep: On the Edge? Team 6 Your bighorn sheep herd name is MUDDY AND BLACK MOUNTAINS HERD Instructions for this Activity You should be in one of 6 teams. Individually, read through the Background Information thoroughly, calculate the missing data in the Table 1-6, and create your two graphs. Then, work as a team to answer the questions and create a list of factors (things) that affect the conservation of your bighorn sheep herd. Finally, as a team create a presentation that you will give to the rest of the class. At the end of these Student Pages, you will find a list of things you should include in the presentation. BACKGROUND INFORMATION The Muddy and Black Mountain Herd is located east of Las Vegas and occupies about 263,369 acres. Student Pages for Team 6 Page 1 Bighorn Sheep Subspecies The subspecies of bighorn sheep in the Muddy and Black Mountains Herd is the desert bighorn sheep. History and Habitat The Muddy and Black Mountains Herd is a native herd. The Muddy Mountains is adjacent to the Black Mountains. The habitat in the Muddy Mountains is primarily dominated by creosote bush, white bursage (Ambrosia dumosa), and black brush (Coleogyne ramosissima) with an understory of limited perennial fluff grass and desert needle grass. There are also a lot of flowers, with a peak bloom in late March/early April. There is a diversity of cactus species in this area, with barrel, beavertail, cholla, and others. The plant community in the Black Mountains is not as diverse as that in the Muddy Mountains. -
Kinematics and Timing of Tertiary Extension in the Western Lake Mead Region, Nevada
Kinematics and timing of Tertiary extension in the western Lake Mead region, Nevada ERNEST M. DUEBENDORFER Department of Geology, Northern Arizona University, Flagstaff, Arizona 86011 DAVID A. SIMPSON* Department of Geoscience, University of Nevada, Las Vegas, Nevada 89154 ABSTRACT postdate the major phase of extension and in footwall geometry (McClay and Ellis, right-slip faulting in the western Lake Mead 1987; Ellis and McClay, 1988), regional con- Explanation of the origin of the complex ar- area. strictional strains (Fletcher and Bartley, ray of structures in some extensional terrenes Dynamic models that invoke either a single 1991; Anderson and Barnhardt, 1993), or far- (including folds and normal, strike-slip, and stress Held or rotating stress fields to explain field compressive stresses unrelated to the reverse faults) includes many models that im- development of structures in the western Lake extensional process (Cakir and Aydin, 1990). plicitly assume kinematic compatibility be- Mead area are inconsistent with the kinematic Models proposed to explain the origin of di- tween and contemporaneous operation of these and age data. Similarly, kinematic models that verse structural assemblages in structurally structures. We present new stratigraphic and view all structures in the context of a single complex extensional terranes such as the age data from the highly extended western strain field are precluded by systematic cross- Lake Mead region, southern Nevada, have Lake Mead region, Nevada, together with an cutting relationships that demonstrate at least assumed implicitly that all structures are analysis of fault kinematics (technique of Mar- partial diachroneity of deformational styles. kinematically compatible and developed and rett and Allmendinger, 1990) to test the as- Large-magnitude extension south of the Las operated contemporaneously. -
2002 Between the Basins
Between the Basins: Exploring the Western Mojave and Southern Basin and Range Province Robert E. Reynolds, Editor LSA Associates, Inc. and Abstracts from the 2002 Desert Symposium California State University, Desert Studies Consortium Department of Biological Science California State University, Fullerton Fullerton, California 92384 in association with LSA Associates, Inc. 1650 Spruce Street, Suite 500 Riverside, California 92507 April 2002 Table of Contents Between the Basins: Field Guide Robert E. Reynolds ........................................................................................................................................................ 3 California Dinosaur Tracks: Inventory and Management R.E. Reynolds and Ted Weasma .................................................................................................................................. 15 Borax Smith and the Tonopah & Tidewater Railroad Stephen P. Mulqueen .................................................................................................................................................... 19 Geology and Minerals in the Area of Pisgah Volcanic Cone Larry W. Monroe .......................................................................................................................................................... 26 The Sulfur Hole, Calico District, San Bernardino County, California J.F. Cooper Jr., G.E. Dunning, T.A. Hadley, W.P. Moller, and R.E. Reynolds ............................................................ 29 Fossil Creodont and