Death Valley National Park
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Hecastocleideae (Hecastocleidoideae)
Chapter 16 Hecastocleideae (Hecastocleidoideae) Vicki A. Funk and D.J. Nicholas Hind HISTORICAL OVERVIEW AND MORPHOLOGY Carduoideae—'rest of the family' split (see Chapters 12 and 44) and this placement has 100% bootstrap support. Hecastodeis shockleyi A. Gray was described in 1882 and its Its current position is supported by its distinct morphol- unusual morphology and restricted distribution has made ogy and strong support from molecular data. Its near- it sought after for herbarium specimens. This shrub is est downstream neighbor, however, is somewhat tenu- easily identified because of its single flowered heads that ous, because the position of the branch just below it are re-aggregated on a receptacle in groups of one to five (Gochnatieae) has only 65% bootstrap support (Panero heads; each group of heads is subtended by a relatively and Funk 2008) and might collapse into a polytomy large spiny whitish or greenish bract (Fig. 16.1). Gray with Mutisieae s.str. If one does the phylogenetic analysis (1882) commented that is was "a remarkable addition without Hecastodeis, there is no change in the phylogeny to the few known North American Mutisieae, to stand of the family. near Ainsliaea DC. but altogether sui generis and of pecu- liar habit." According to Williams (1977) the generic name Hecastodeis, "... comes from the Greek roots, ekastos TAXONOMY meaning 'each' and kleio meaning 'to shut up'", referring to each flower having its own involucre. The species The genus is monotypic and has always been recognized was named after William H. Shockley one of the first as such since its original description by Gray (1882). -
The Climate of Death Valley, California
THE CLIMATE OF DEATH VALLEY, CALIFORNIA BY STEVEN ROOF AND CHARLIE CALLAGAN The notoriously extreme climate of Death Valley records shows significant variability in the long-term, including a 35% increase in precipitation in the last 40 years. eath Valley National Park, California, is widely known for its extreme hot and Ddry climate. High summer temperatures, low humidity, high evaporation, and low pre- cipitation characterize the valley, of which over 1300 km2 (500 mi2) are below sea level (Fig. 1). The extreme summer climate attracts great interest: July and August visitation in Death Valley National Park has doubled in the last 10 years. From June through August, the average temperature at Furnace Creek, Death Valley [54 m (177 ft) below sea level] is 98°F (37°C).1 Daytime high temperatures typically exceed 90°F (32°C) more than half of the year, and temperatures above 120°F (49°C) occur 1 Weather data are reported here in their original units in to order retain the original level of precision re- corded by the observers. FIG. I. Location map of the Death Valley region. Death Valley National Park is outlined in blue, main roads shown in red, and the portion of the park below sea level is highlighted in white. AFFILIATIONS: ROOF—School of Natural Science, Hampshire E-mail: [email protected] College, Amherst, Massachusetts; CALLAGAN—National Park Service, DOI: 10.1 175/BAMS-84-12-1725 Death Valley National Park, Death Valley, California. In final form 17 January 2003 CORRESPONDING AUTHOR: Dr. Steve Roof, School of Natural © 2003 American Meteorological Society Science, Hampshire College, Amherst, MA 01002 AMERICAN METEOROLOGICAL SOCIETY DECEMBER 2003 BAfft I 1725 Unauthenticated | Downloaded 10/09/21 10:14 PM UTC 5-20 times each year. -
Tectonic Influences on the Spatial and Temporal Evolution of the Walker Lane: an Incipient Transform Fault Along the Evolving Pacific – North American Plate Boundary
Arizona Geological Society Digest 22 2008 Tectonic influences on the spatial and temporal evolution of the Walker Lane: An incipient transform fault along the evolving Pacific – North American plate boundary James E. Faulds and Christopher D. Henry Nevada Bureau of Mines and Geology, University of Nevada, Reno, Nevada, 89557, USA ABSTRACT Since ~30 Ma, western North America has been evolving from an Andean type mar- gin to a dextral transform boundary. Transform growth has been marked by retreat of magmatic arcs, gravitational collapse of orogenic highlands, and periodic inland steps of the San Andreas fault system. In the western Great Basin, a system of dextral faults, known as the Walker Lane (WL) in the north and eastern California shear zone (ECSZ) in the south, currently accommodates ~20% of the Pacific – North America dextral motion. In contrast to the continuous 1100-km-long San Andreas system, discontinuous dextral faults with relatively short lengths (<10-250 km) characterize the WL-ECSZ. Cumulative dextral displacement across the WL-ECSZ generally decreases northward from ≥60 km in southern and east-central California, to ~25 km in northwest Nevada, to negligible in northeast California. GPS geodetic strain rates average ~10 mm/yr across the WL-ECSZ in the western Great Basin but are much less in the eastern WL near Las Vegas (<2 mm/ yr) and along the northwest terminus in northeast California (~2.5 mm/yr). The spatial and temporal evolution of the WL-ECSZ is closely linked to major plate boundary events along the San Andreas fault system. For example, the early Miocene elimination of microplates along the southern California coast, southward steps in the Rivera triple junction at 19-16 Ma and 13 Ma, and an increase in relative plate motions ~12 Ma collectively induced the first major episode of deformation in the WL-ECSZ, which began ~13 Ma along the N60°W-trending Las Vegas Valley shear zone. -
Alluvial Fans in the Death Valley Region California and Nevada
Alluvial Fans in the Death Valley Region California and Nevada GEOLOGICAL SURVEY PROFESSIONAL PAPER 466 Alluvial Fans in the Death Valley Region California and Nevada By CHARLES S. DENNY GEOLOGICAL SURVEY PROFESSIONAL PAPER 466 A survey and interpretation of some aspects of desert geomorphology UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1965 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director The U.S. Geological Survey Library has cataloged this publications as follows: Denny, Charles Storrow, 1911- Alluvial fans in the Death Valley region, California and Nevada. Washington, U.S. Govt. Print. Off., 1964. iv, 61 p. illus., maps (5 fold. col. in pocket) diagrs., profiles, tables. 30 cm. (U.S. Geological Survey. Professional Paper 466) Bibliography: p. 59. 1. Physical geography California Death Valley region. 2. Physi cal geography Nevada Death Valley region. 3. Sedimentation and deposition. 4. Alluvium. I. Title. II. Title: Death Valley region. (Series) For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C., 20402 CONTENTS Page Page Abstract.. _ ________________ 1 Shadow Mountain fan Continued Introduction. ______________ 2 Origin of the Shadow Mountain fan. 21 Method of study________ 2 Fan east of Alkali Flat- ___-__---.__-_- 25 Definitions and symbols. 6 Fans surrounding hills near Devils Hole_ 25 Geography _________________ 6 Bat Mountain fan___-____-___--___-__ 25 Shadow Mountain fan..______ 7 Fans east of Greenwater Range___ ______ 30 Geology.______________ 9 Fans in Greenwater Valley..-----_____. 32 Death Valley fans.__________--___-__- 32 Geomorpholo gy ______ 9 Characteristics of fans.._______-___-__- 38 Modern washes____. -
Death Valley Splendor Featuring Death Valley National Park - Two-Night Stay at the Ranch at Death Valley - Step-On Guide November 7-9, 2021 ~ 3 Day Tour
Devil’s Golf Course GOOD TIMES TRAVEL DEATH VALLEY SPLENDOR FEATURING DEATH VALLEY NATIONAL PARK - TWO-NIGHT STAY AT THE RANCH AT DEATH VALLEY - STEP-ON GUIDE NOVEMBER 7-9, 2021 ~ 3 DAY TOUR TOUR HIGHLIGHTS w Enjoy a two-night stay in the heart of Death Valley National Park at The Ranch at Death Valley, the sprawling, recently renovated resort featuring deluxe rooms with a patio or balcony, a spring-fed swimming pool and recently built restaurants within a reimagined Spanish Colonial Revival town square w Guided sightseeing with a knowledgable step-on guide in Death Valley National Park to see the incredible “must see” sites including Devil’s Golf Course, Mesquite Flat Sand Dunes, Ubehebe Crater, Harmony Borax Works, Zabriskie Point, The Inn at Death Valley and Badwater – the lowest point in the Manly Beacon from Zabriskie Point western hemisphere at 282 feet below sea level w Enjoy an included lunch at the “Jewel of Death Valley,” The Inn at Death Valley, the historic AAA Four Diamond hotel that’s been an elegant hideaway here since 1927 TOUR INCLUSIONS w 2 Nights deluxe hotel accommodations w 3 Meals – 1 lunch, 2 breakfasts w Services of a professional tour director Badwater Ubehebe Crater w Guided sightseeing with a step-on guide w Admissions per itinerary w Transportation aboard a deluxe motorcoach w Luggage handling throughout the tour ACCOMMODATIONS w Nights 1-2 The Ranch at Death Valley Death Valley, CA TOUR PRICES Double Occupancy: $699 per person Single Occupancy (no roommate): Add $250 The Ranch at Death Valley The Inn at Death Valley Good Times Travel w www.goodtimestravel.comFresno’s Blossom w (714) 848-1255Trail w 17132 Magnolia St., Fountain Valley, CA 92708-3348 RESERVATIONS ITINERARY Ever since the first immigrants saw Death Valley, fantastic tales have been told of its incredible temperatures and enormous riches. -
Upper Neogene Stratigraphy and Tectonics of Death Valley — a Review
Earth-Science Reviews 73 (2005) 245–270 www.elsevier.com/locate/earscirev Upper Neogene stratigraphy and tectonics of Death Valley — a review J.R. Knott a,*, A.M. Sarna-Wojcicki b, M.N. Machette c, R.E. Klinger d aDepartment of Geological Sciences, California State University Fullerton, Fullerton, CA 92834, United States bU. S. Geological Survey, MS 975, 345 Middlefield Road, Menlo Park, CA 94025, United States cU. S. Geological Survey, MS 966, Box 25046, Denver, CO 80225-0046, United States dTechnical Service Center, U. S. Bureau of Reclamation, P. O. Box 25007, D-8530, Denver, CO 80225-0007, United States Abstract New tephrochronologic, soil-stratigraphic and radiometric-dating studies over the last 10 years have generated a robust numerical stratigraphy for Upper Neogene sedimentary deposits throughout Death Valley. Critical to this improved stratigraphy are correlated or radiometrically-dated tephra beds and tuffs that range in age from N3.58 Ma to b1.1 ka. These tephra beds and tuffs establish relations among the Upper Pliocene to Middle Pleistocene sedimentary deposits at Furnace Creek basin, Nova basin, Ubehebe–Lake Rogers basin, Copper Canyon, Artists Drive, Kit Fox Hills, and Confidence Hills. New geologic formations have been described in the Confidence Hills and at Mormon Point. This new geochronology also establishes maximum and minimum ages for Quaternary alluvial fans and Lake Manly deposits. Facies associated with the tephra beds show that ~3.3 Ma the Furnace Creek basin was a northwest–southeast-trending lake flanked by alluvial fans. This paleolake extended from the Furnace Creek to Ubehebe. Based on the new stratigraphy, the Death Valley fault system can be divided into four main fault zones: the dextral, Quaternary-age Northern Death Valley fault zone; the dextral, pre-Quaternary Furnace Creek fault zone; the oblique–normal Black Mountains fault zone; and the dextral Southern Death Valley fault zone. -
Mineral Resources and Mineral Resource Potential of the Saline Valley and Lower Saline Wilderness Study Areas Inyo County, California
UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Mineral resources and mineral resource potential of the Saline Valley and Lower Saline Wilderness Study Areas Inyo County, California Chester T. Wrucke, Sherman P. Marsh, Gary L. Raines, R. Scott Werschky, Richard J. Blakely, and Donald B. Hoover U.S. Geological Survey and Edward L. McHugh, Clay ton M. Rumsey, Richard S. Gaps, and J. Douglas Causey U.S. Bureau of Mines U.S. Geological Survey Open-File Report 84-560 Prepared by U.S. Geological Survey and U.S. Bureau of Mines for U.S. Bureau of Land Management This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. 1984 UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Mineral resources and mineral resource potential of the Saline Valley and Lower Saline Wilderness Study Areas Inyo County, California by Chester T. Wrucke, Sherman P. Marsh, Gary L. Raines, R. Scott Werschky, Richard J. Blakely, and Donald B. Hoover U.S. Geological Survey and Edward L. McHugh, Clayton M. Rumsey, Richard S. Gaps, and J. Douglas Causey U.S. Bureau of Mines U.S. Geological Survey Open-File Report 84-560 This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. 1984 ILLUSTRATIONS Plate 1. Mineral resource potential map of the Saline Valley and Lower Saline Wilderness Study Areas, Inyo County, California................................ In pocket Figure 1. Map showing location of Saline Valley and Lower Saline Wilderness Study Areas, California.............. 39 2. -
2021 Magazine
July 2021 Welcome to the July 2021 edition of BADWATER® Magazine! We are AdventureCORPS®, producers of ultra-endurance sports events and adventure travel across the globe, and the force behind the BADWATER® brand. This magazine celebrates the entire world-wide Badwater® / AdventureCORPS® series of races, all the Badwater Services, Gear, Drinks, and Clothing, and what we like to call the Badwater Family and the Badwater Way of Life. Adventure is our way of life, so – after the sad and disastrous 2020 when we were not able to host any of our life-changing events – we are pleased to be fully back in action in 2021! Well, make that almost fully: Due to pandemic travel bans still in place, international participation in our USA-based events is not where we want it and that’s really unfortunate. Badwater 135 is the de facto Olympics of Ultrarunning and the 135-Mile World Championship, so we always want as many nationalities represented as possible. (The inside front cover of this magazine celebrates all sixty-one nationalities which have been represented on the Badwater 135 start line over the years.) Our new six-day stage race across Armenia – Artsakh Ultra – will have to wait yet another year to debut in 2022, two years later than planned. But it will be incredible, the ultimate stage race with six days of world-class trail running through several millennia of incredible culture and history, and across the most dramatic and awe-inspiring landscapes. This year, we are super excited to have brought two virtual races to life, first for the 31 days of January, and then for 16 days in April. -
Syn-Eruptive, Soft-Sediment Deformation of Deposits
Solid Earth, 6, 553–572, 2015 www.solid-earth.net/6/553/2015/ doi:10.5194/se-6-553-2015 © Author(s) 2015. CC Attribution 3.0 License. Syn-eruptive, soft-sediment deformation of deposits from dilute pyroclastic density current: triggers from granular shear, dynamic pore pressure, ballistic impacts and shock waves G. A. Douillet1, B. Taisne2, È. Tsang-Hin-Sun3, S. K. Müller4, U. Kueppers1, and D. B. Dingwell1 1Earth and Environmental Sciences, Ludwig-Maximilians-Universität, Munich, Germany 2Earth Observatory of Singapore, Nanyang Technological University, Singapore 3Université of Brest and CNRS, Laboratoire Domaines Océaniques, Plouzaré, France 4Meteorological Institute, Ludwig-Maximilians-Universität, Munich, Germany Correspondence to: G. A. Douillet ([email protected]) Received: 17 November 2014 – Published in Solid Earth Discuss.: 16 December 2014 Revised: 16 April 2015 – Accepted: 20 April 2015 – Published: 21 May 2015 Abstract. Soft-sediment deformation structures can provide to be the signature of shear instabilities occurring at the valuable information about the conditions of parent flows, boundary of two granular media. They may represent the sediment state and the surrounding environment. Here, the frozen record of granular, pseudo Kelvin–Helmholtz examples of soft-sediment deformation in deposits of dilute instabilities. Their recognition can be a diagnostic for pyroclastic density currents are documented and possible flows with a granular basal boundary layer. Vertical syn-eruptive triggers suggested. Outcrops from six different inter-penetration and those folds-and-faults features related volcanoes have been compiled in order to provide a to slumps are driven by their excess weight and occur | downloaded: 11.10.2021 broad perspective on the variety of structures: Soufrière after deposition but penecontemporaneous to the eruption. -
Volume 66 Issue 1 Winter 2021
Preservation By David Blacker, Executive Director From the Director DVNHA One of the biggest highlights of visiting Death Valley National Park or Ash Meadows National Wildlife Refuge is seeing and maybe getting a photo of a desert bighorn sheep. You see the desert bighorn in our logo, a strong and majestic animal with iconic large curling horns, but your chance of seeing one of these incredible creatures is shrinking. Surprisingly the biggest reason is not climate change, but the spread of an invasive species that dominates and destroys their water sources and bullies them out of their historic range. In the economic downturn of the early 2000s, people stopped adopting burros and the Bureau of Land Management (BLM) pens filled up. A growing unchecked burro population began to grow and spread. I began to hear reports of sightings in Panamint Valley and the Nevada Triangle back in 2005. Now there are herds occupying Butte Valley, Skidoo, Wildrose, and southern areas of the park. Everywhere burros appear, the impact is predictable. First they seize control of the local water source, trampling or eating the native vegetation. Being very territorial, they use their size and aggressive nature to chase off any competition. Once burros move into a water source, bighorn sheep will not use it. Our partners at NPS are working diligently to reduce and remove invasive burros from the park. They have partnered with Peaceful Valley Donkey Rescue to roundup and adopt out burros from Death Valley. Burro numbers increase by 20-30% a year, so more than 750 burros need to be rounded up annually to stay ahead of reproduction. -
Open-File/Color For
Questions about Lake Manly’s age, extent, and source Michael N. Machette, Ralph E. Klinger, and Jeffrey R. Knott ABSTRACT extent to form more than a shallow n this paper, we grapple with the timing of Lake Manly, an inconstant lake. A search for traces of any ancient lake that inundated Death Valley in the Pleistocene upper lines [shorelines] around the slopes Iepoch. The pluvial lake(s) of Death Valley are known col- leading into Death Valley has failed to lectively as Lake Manly (Hooke, 1999), just as the term Lake reveal evidence that any considerable lake Bonneville is used for the recurring deep-water Pleistocene lake has ever existed there.” (Gale, 1914, p. in northern Utah. As with other closed basins in the western 401, as cited in Hunt and Mabey, 1966, U.S., Death Valley may have been occupied by a shallow to p. A69.) deep lake during marine oxygen-isotope stages II (Tioga glacia- So, almost 20 years after Russell’s inference of tion), IV (Tenaya glaciation), and/or VI (Tahoe glaciation), as a lake in Death Valley, the pot was just start- well as other times earlier in the Quaternary. Geomorphic ing to simmer. C arguments and uranium-series disequilibrium dating of lacus- trine tufas suggest that most prominent high-level features of RECOGNITION AND NAMING OF Lake Manly, such as shorelines, strandlines, spits, bars, and tufa LAKE MANLY H deposits, are related to marine oxygen-isotope stage VI (OIS6, In 1924, Levi Noble—who would go on to 128-180 ka), whereas other geomorphic arguments and limited have a long and distinguished career in Death radiocarbon and luminescence age determinations suggest a Valley—discovered the first evidence for a younger lake phase (OIS 2 or 4). -
Death Valley Springs Geochemical Investigation Yucca Mountain Nuclear Repository, Inyo County Oversight-1998
The HYDRODYNAMICS Group studies in mass and energy transport in the earth Death Valley Springs Geochemical Investigation Yucca Mountain Nuclear Repository, Inyo County Oversight-1998 Submitted to: Inyo County Planning Department: Yucca Mountain Repository Oversight Program March, 1999 Michael J. King, R.G., C.HG. John D. Bredehoeft, Ph.D., NAE The HYDRODYNAMICS Group 16711 76th Avenue West, Edmonds, WA 98026 Phone (425) 787-6728, Fax (425) 742-8493 Page 1 The Hydrodynamics Group DEATH VALLEY SPRINGS GEOCHMICAL INVESTIGATION YUCCA MOUNTAIN NUCLEAR WASTE REPOSITORY, INYO COUNTY OVERSIGHT-1998 EXECUTIVE SUMMARY Yucca Mountain, Nevada is under study as the site of the only proposed high-level nuclear waste repository in the United States. The repository concept uses the philosophy of multiple barriers, both engineered and natural, each of which impedes the movement of radionuclides into the accessible environment. The proposed repository would be in the unsaturated zone in Tertiary tuffaceous rocks. The principal transporting mechanism for radionuclides is moving ground water. Underlying the repository is an extensive Lower Carbonate Aquifer known to be highly permeable. Inyo County, as an affected unit of local government under the Nuclear Waste Policy Act, as amended, is concerned with the connections between the Lower Carbonate Aquifer underlying Yucca Mountain and the carbonate sources of waters in Inyo County, especially the Death Valley region. This report is a summary of the investigations conducted by Inyo County’s consultants, the Hydrodynamics Group, during calendar year 1998. This report presents the results of The Hydrodynamics Group’s 1998 collection of water samples from 23 springs and 2 creeks in Death Valley.