DOCSLIB.ORG

Rock-Floor of Intermont Plains of the Aeid Region1

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Rock-Floor of Intermont Plains of the Aeid Region1 BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA ROCK-FLOOR OF INTERMONT PLAINS OF THE AEID REG IO N 1 BY CHARLES E. KEYES (Read before the Society December SO, 1907) CONTENTS I’age Introductory ................................................................................................................ 03 Foundation of the arid plains................................................................................ 64 Definition of “bolson”........................................................................................ 64 Jornada del Muerto as the type................................................................. .. 65 Substructure of the Estancia plains.............................................................. 67 Las Vegas of N evada....................................................................................... 68 Inter-relationships of intermont plains of California.............................. .. 69 Course of the Colorado river.......................................................................... 70 Surface of the Colorado plateau.................................................................... 72 Bolsons of northern Mexico......................................................... .................... 72 Debris of the bolson plains.............................................................................. 73 Significance of a thinly mantled rock-floor...................................... ................... 74 Origin of the rock-floor surface.......................................................... ................... 74 Peneplanation .................................................................................................... 74 Planation independent of sealevel................................................................. 76 Sheetflood erosion ............................................................................................. 78 Eolian erosion in arid regions........................................................................ 81 Playa deposits ................................................................................................... 83 Arid plains of other regions............................................................................ 85 Plauorasion ......................................................................................................... 86 Geographic cycle in an arid climate...................................................................... 86 Recapitulation ........................................................................................................... 91 I ntroductory The geologic structure oF the arid region comprising the Great Basin oF western America and the northern part oF the Mexican taBleland is sup­ posed to Be characteristic oF that anomalous class oF geotectonics known as the Basin Range, or Block Mountain, type. Its distinctive Feature is commonly considered as the product oF normal Faulting on a prodigious 1 Manuscript received By the Secretary oF the Society January 11, 1908. VIII— Bull. Geol. Soc. Am., Vol. 19, 1907 (63) 6 4 C. R. KEYES----INTERMONT PLAINS OP THE ARID REGION scale. Lately, the long accepted opinions regarding the Basin Range structure have Been Brought seriously into question. As a result a new interest in the suBject has Been kindled. That the tectonics oF the regions mentioned have never received the careFul consideration that the natural advantages For study would seem to demand is due partly to a singular notion which has prevailed From the First, that these regions present structures oF great simplicity and hence require little detailed.examination. Physiographically the dominant Feature oF the Great Basin and the Mexican taBleland is the plain. The most conspicuous Features are the mountains. These, like isolated, loFty piles, rise aBruptly aBove the even, sea-like plains as do volcanic isles out oF the ocean. Areally the highlands occupy much the less space. One-FiFth oF the surFace oF the region is mountain; the plains cover Four-FiFths. To the casual oBserver the smooth surFace oF the plains appears to have Few exposures oF Bedrock and to Be everywhere deeply mantled By loose, and For the most part rather coarse, rock-waste. The mountains, on the other hand, are Bare and Free oF vegetation, permitting their structure to Be displayed as nowhere else in the world outside oF arid countries. The geologic structure oF these regions has Been in the pa^t largely inFerred From the parts protruding aBove the level oF the plains, while those por­ tions Beneath that level have Been generally regarded as inaccessiBle and have Been almost altogether neglected. The general tectonics oF the two regions under consideration and the Basin Range structures need not Be taken into account now, For the reason that they will receive special attention in another place. In the present connection only the characters oF the suBstructure oF the plains is to Be considered. F o u n d a t io n o p t h e a r id P l a in s DEFINITION OF “BOLSON” Although views regarding the geologic structure oF the Great Basin region and oF the Mexican taBleland have diFFered more or less in details, there has Been a consensus oF opinion that the mountains are Being worn down to Build up the intervening plains, and that Finally the Former will Be all carried down into the latter. A common opinion is the one ad­ vanced By Le Conte, which regards the mountains as the elevated margins oF huge tilted Blocks and the plains the depressed and Buried portions oF the same Blocks.2 Starting with this conception, it is an easy step to the 2 American Journal oF Science (3), vol. xxxviii, 1889, p, 259; also Elements Geology, 5th edition, 1904, p. 242. DEFINITION OP “BOLSON” 6 5 conclusion that the plains are all deeply covered By mountain waste, even to depths oF thousands oF Feet. At First glance on the ground such an explanation oF the phenomenon presented seems to leave little room For reFutation. So Firmly has this notion prevailed that Hill, in 1900, in descriBing the physiographical Features oF the Greater Texas region (including New Mexico and Colorado east oF the Rio Grande), gave it technical Fixity By calling the intermont plains in the New Mexican part oF the district “bolsons,” deriving the name From the Spanish title For these plains, which signiFies a purse, or Basin without outlet. Hill’s deFinition is essen­ tially as Follows: “These plains, or basins, as they are sometimes called, are largely structural in origin. Bolsons are generally floored with loose, unconsolidated sediments derived from the higher peripheral region.. Along the margins of these plains are talus hills and fans of boulders and other wash deposits brought down by the mountain freshets. The sediments of some of the bolsons may be of lacus­ trine origin. It is essential, in both the geographic and the geologic discussion, to bear in mind the distinction between bolson plains and plateau plains. The plateau plains and the mountains are genetically related, the strata composing the one being bent onto or flexed out of the other. The bol­ son plains, on the other hand, are newer and later topographic features, con­ sisting of structural valleys between mountains or plateau plains, which have been partially filled with debris derived from the adjacent eminences. The plateau plains are usually destructional stratum plains. The bolson plains are constructional detritus plains filling old structural troughs.” The types which Hill selected to illustrate his deFinition and which he speciFically descriBed were the Hueco, Sandoval (Estancia plains), and the Jornada del Muerto Basins, all oF which are in eastern New Mexico. Some minor Basins Farther to the southward were also BrieFly mentioned. JORNADA DEL MUERTO AS THE TYPE ABout the time oF the appearance oF the Hill memoir I was engaged in making geologic inquiries into the underground water supplies oF the region occupied By the three great Bolsons mentioned. These investiga­ tions were undertaken For three diFFerent railways, and were soon aFter­ ward supplemented By similar inquiries For several mining companies. This work was not hurried geological reconnaissance, But careFul investi­ gation extending over a period oF several years with residence in the region. Its results were .measuraBle quantities, demanding expression in Feet and dollars. Some oF the more important oF these results have Been already puBlished in a memoir on the “Underground water conditions oF 6 6 C. R. KEYES---- INTERMONT PLAINS OP THE ARID REGION the Jornada del Muerto, New Mexico,”3 “Geotectonics oF the Estancia plains/’4 and other shorter papers, to which reFerence may Be made For many details Bearing upon the suBjects here discussed. As early as 1903 I endeavored to show,5 in a BrieF article on the “Geo­ logical structure oF New Mexican Bolson plains,” that (1), so Far at least as the Jornada del Muerto and Estancia plains were concerned, Hill’s in­ terpretations were wholly incorrect; (2) instead oF Being structural val­ leys deeply covered By mountain waste, the rock surFace oF the two Basins reFerred to was worn out on the Beveled edges oF Cretacic and CarBonic strata, representing a total thickness oF more than 10,000 Feet; and (3), For the most part, the rqck-Floor oF these plains was covered By only a thin veneer instead oF By great thicknesses oF loose materials. A geological cross-section oF the Jornada del Muerto presents some­ thing oF the structure represented Below (Figure 1), the length oF the sec­ tion Being aBout
Load more

Recommended publications
  • Appendix E High-Potential Historic Sites
    APPENDIX E HIGH-POTENTIAL HISTORIC SITES National Trails System Act, SEC. 12. [16USC1251] As used in this Act: (1) The term “high-potential historic sites” means those historic sites related to the route, or sites in close proximity thereto, which provide opportunity to interpret the historic significance of the trail during the period of its major use. Criteria for consideration as high-potential sites include historic sig­ nificance, presence of visible historic remnants, scenic quality, and relative freedom from intrusion.. Mission Ysleta, Mission Trail Indian and Spanish architecture including El Paso, Texas carved ceiling beams called “vigas” and bell NATIONAL REGISTER tower. Era: 17th, 18th, and 19th Century Mission Ysleta was first erected in 1692. San Elizario, Mission Trail Through a series of flooding and fire, the mis­ El Paso, Texas sion has been rebuilt three times. Named for the NATIONAL REGISTER patron saint of the Tiguas, the mission was first Era: 17th, 18th, and 19th Century known as San Antonio de la Ysleta. The beauti­ ful silver bell tower was added in the 1880s. San Elizario was built first as a military pre­ sidio to protect the citizens of the river settle­ The missions of El Paso have a tremendous ments from Apache attacks in 1789. The struc­ history spanning three centuries. They are con­ ture as it stands today has interior pillars, sidered the longest, continuously occupied reli­ detailed in gilt, and an extraordinary painted tin gious structures within the United States and as ceiling. far as we know, the churches have never missed one day of services.
    [Show full text]
  • Geoarchaeology of the Mockingbird Gap (Clovis) Site, Jornada Del Muerto, New Mexico
    GEA243_07_20265.qxd 4/3/09 3:52 PM Page 348 Geoarchaeology of the Mockingbird Gap (Clovis) Site, Jornada del Muerto, New Mexico Vance T. Holliday,1,* Bruce B. Huckell,2 Robert H. Weber,3 Marcus J. Hamilton,4 William T. Reitze,5 and James H. Mayer6 1Departments of Anthropology and Geosciences, University of Arizona, Tucson, AZ 85721 2Maxwell Museum of Anthropology, University of New Mexico, Albuquerque, NM 87131 3New Mexico Bureau of Geology and Mineral Resources, Socorro, NM (Deceased) 4Department of Anthropology, University of New Mexico, Albuquerque, NM 87131 5Department of Anthropology, University of Arizona, Tucson, AZ 85721 6Department of Geosciences, University of Arizona, Tucson, AZ 85721 The Mockingbird Gap site is one of the largest Clovis sites in the western United States, yet it remains poorly known after it was tested in 1966–1968. Surface collecting and mapping of the site revealed a dense accumulation of Clovis lithic debris stretching along Chupadera Draw, which drains into the Jornada del Muerto basin. We conducted archaeological testing and geoarchaeological coring to assess the stratigraphic integrity of the site and gain clues to the paleoenvironmental conditions during the Clovis occupation. The 1966–1968 excavations were in stratified Holocene eolian sand and thus that assemblage was from a disturbed content. An intact Clovis occupation was found elsewhere in the site, embedded in the upper few cen- timeters of a well-developed buried Bt horizon formed in eolian sand, representing the regional Clovis landscape. Coring in Chupadera Draw revealed ϳ11 m of fill spanning the past ϳ11,000 14C years. The stratified deposits provide evidence of flowing and standing water on the floor of the draw during Clovis times, a likely inducement to settlement.
    [Show full text]
  • Global Lithium Sources—Industrial Use and Future in the Electric Vehicle Industry: a Review
    resources Review Global Lithium Sources—Industrial Use and Future in the Electric Vehicle Industry: A Review Laurence Kavanagh * , Jerome Keohane, Guiomar Garcia Cabellos, Andrew Lloyd and John Cleary EnviroCORE, Department of Science and Health, Institute of Technology Carlow, Kilkenny, Road, Co., R93-V960 Carlow, Ireland; [email protected] (J.K.); [email protected] (G.G.C.); [email protected] (A.L.); [email protected] (J.C.) * Correspondence: [email protected] Received: 28 July 2018; Accepted: 11 September 2018; Published: 17 September 2018 Abstract: Lithium is a key component in green energy storage technologies and is rapidly becoming a metal of crucial importance to the European Union. The different industrial uses of lithium are discussed in this review along with a compilation of the locations of the main geological sources of lithium. An emphasis is placed on lithium’s use in lithium ion batteries and their use in the electric vehicle industry. The electric vehicle market is driving new demand for lithium resources. The expected scale-up in this sector will put pressure on current lithium supplies. The European Union has a burgeoning demand for lithium and is the second largest consumer of lithium resources. Currently, only 1–2% of worldwide lithium is produced in the European Union (Portugal). There are several lithium mineralisations scattered across Europe, the majority of which are currently undergoing mining feasibility studies. The increasing cost of lithium is driving a new global mining boom and should see many of Europe’s mineralisation’s becoming economic. The information given in this paper is a source of contextual information that can be used to support the European Union’s drive towards a low carbon economy and to develop the field of research.
    [Show full text]
  • New Mexico Archaeology New Mexico Archaeology
    NTheNew ewNewsletter MMexicoexico of the Friends AArchaeology rchaeologyof Archaeology November 2010 From The Director Treasury Report Eric Blinman, OAS Director, THANK YOU! and John Karon, FOA Treasurer FOA support for the furniture and fixture campaign for the Center for FOA is an educational, research, and fund raising New Mexico Archaeology (CNMA) has been overwhelming! With organization; the latter supports the former. FOA pledges and contributions, we have reached our goal of $75,000. doesn’t charge dues for membership, so if you are a More than 100 people have contributed, with contributions honoring member of the MNM Foundation and express inter- the memories of Marjorie Mizerak, Marshall Clinard, and Jerome est in archaeology you are an FOA member. Lipetzky. Most of you knew Marj and her surviving husband, Bob. FOA raises funds through specific events, They have been long term volunteers for OAS and trip leaders lectures and trips as well as donations from indi- for FOA. Marshall was the husband of Arlen Clinard, an OAS viduals. The Endowment and the Center for New volunteer, and Marshall was the last surviving member of Edgar Mexico Archaeology furniture and fixtures cam- Lee Hewett’s Chaco field schools. Jerry Lipetzky was a high school paign are separate, and their status is summarized in teacher who created the teaching simulations DIG and DIG 2 that are “From the Director”. This report provides a snap- used nation-wide. He sparked my interest in archaeology in 1967, shot of FOA fund raising and distributions over the and he is responsible for initiating the careers of at least six Ph.D.
    [Show full text]
  • Hydrogeology of Central Jornada Del Muerto: Implications for Travel Along El Camino Real De Tierra Adentro, Sierra and Doña Ana Counties, New Mexico
    NEW MEXICO BUREAU OF GEOLOGY AND MINERAL RESOURCES Hydrogeology of central Jornada del Muerto: Implications for travel along El Camino Real de Tierra Adentro, Sierra and Doña Ana Counties, New Mexico Talon Newton, Trevor Kludt, Dave Love, and Ethan Mamer Open-file Report 573 June 2015 New Mexico Bureau of Geology and Mineral Resources A division of New Mexico Institute of Mining and Technology Socorro, NM 87801 (575) 835 5490 Fax (575) 835 6333 geoinfo.nmt.edu Hydrogeology of central Jornada del Muerto: Implications for travel along El Camino Real de Tierra Adentro, Sierra and Doña Ana Counties, New Mexico Talon Newton, Trevor Kludt, Dave Love, and Ethan Mamer Open-file Report 573 June 2015 New Mexico Bureau of Geology and Mineral Resources PROJECT FUNDING Funding for this work came from the New Mexico Spaceport Authority as a measure of The Mitigation Plan for El Camino Real de Tierra Adentro, Spaceport America and the Aquifer Mapping Program of the Bureau of Geology and Mineral Resources. The views and conclusions are those of the authors, and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the State of New Mexico. Cover photograph: Spaceport America with a mirage of horse wagons. NEW MEXICO BUREAU OF GEOLOGY AND MINERAL RESOURCES CENTRAL Jornada DEL MUERTO CONTENTS Executive Summary .............................................................. 1 V. Water in the Jornada del Muerto: Supply vs Demand .......................................................45 I. Introduction ......................................................................
    [Show full text]
  • El Camino Real De Tierra Adentro Trail Association
    El Camino Real de Tierra Adentro Trail Association VOLUME II, ISSUE 1 JANUARY 2017 Tusas Springs Route of the Trail by Paul Harden and Peggy Hardman EXECUTIVE BOARD The trail through the Jornada del Muerto is one of the most famous stretches of El MEMBERS Camino Real de Tierra Adentro. However, it is not one continuous trail through the wa- David Reynolds terless trek. There are varying “threads” or Interim-President alternate routes of the trail in different plac- es through today's Ted Turner's Armendaris Troy Ainsworth Ranch. One of those alternate routes is dubbed the “Tusas Springs Route.” As Vice-President shown on the accompanying map, the trail ventured off to the northeast several miles Shelley Sutherland from Deep Well to Tusas Springs Secretary (incorrectly labeled as Tucson Springs on some trail maps), an ample source of water Cynthia J. Shetter today as well as yesterday. From Tusas Interim-Treasurer Springs, the trail turned northwest to wind through some lava flows, then continued in a virtual straight line to the famous trail land- INSIDE THIS mark at Paraje Fra Cristobal on the Rio ISSUE: Grande. In fact, ranch manager Tom Waddell believes where this portion of the Tusas Springs 1 trail winds through the lava from Tusas Route of the Springs may be the true lava gate. Trail This 3-mile diversion for water at Tusas Website 3 Springs from the main trail is not recog- nized as part of El Camino Real by National Enhancements Historic Trails, but has long been recog- caravan was formed and departed for the nized and protected by the Armendaris 60-mile trip on unimproved dirt roads to the Facebook 3 Ranch.
    [Show full text]
  • Crafting and Consuming an American Sonoran Desert: Global Visions, Regional Nature and National Meaning
    Crafting and Consuming an American Sonoran Desert: Global Visions, Regional Nature and National Meaning Item Type text; Electronic Dissertation Authors Burtner, Marcus Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 02/10/2021 04:13:17 Link to Item http://hdl.handle.net/10150/268613 CRAFTING AND CONSUMING AN AMERICAN SONORAN DESERT: GLOBAL VISIONS, REGIONAL NATURE AND NATIONAL MEANING by Marcus Alexander Burtner ____________________________________ copyright © Marcus Alexander Burtner 2012 A Dissertation Submitted to the Faculty of the DEPARTMENT OF HISTORY In Partial Fulfillment of the Requirements for the degree of DOCTOR OF PHILOSOPHY In the Graduate College THE UNIVERSITY OF ARIZONA 2012 2 THE UNIVERSITY OF ARIZONA GRADUATE COLLEGE As members of the Dissertation Committee, we certify that we have read the dissertation prepared by Marcus A. Burtner entitled “Crafting and Consuming an American Sonoran Desert: Global Visions, Regional Nature, and National Meaning.” and recommend that it be accepted as fulfilling the dissertation requirement for the Degree of Doctor of Philosophy ____________________________________________________________Date: 1/7/13 Katherine Morrissey ____________________________________________________________Date: 1/7/13 Douglas Weiner ____________________________________________________________Date: 1/7/13 Jeremy Vetter ____________________________________________________________Date: 1/7/13 Jack C. Mutchler Final approval and acceptance of this dissertation is contingent upon the candidate's submission of the final copies of the dissertation to the Graduate College. I hereby certify that I have read this dissertation prepared under my direction and recommend that it be accepted as fulfilling the dissertation requirement.
    [Show full text]
  • Distributed Deformation Across the Rio Grande Rift, Great Plains, and Colorado Plateau
    Geology, 40(1), 23-26, 2012 Distributed Deformation across the Rio Grande Rift, Great Plains, and Colorado Plateau Henry T. Berglund1, Anne F. Sheehan2, Mark H. Murray3, Mousumi Roy4, Anthony R. Lowry5, R. Steven Nerem6, and Frederick Blume1 1UNAVCO Inc, 6350 Nautilus Drive, Boulder, Colorado 80301-5553, USA 2Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309-0399, USA 3Department of Earth and Environmental Science, New Mexico Tech, Socorro, New Mexico 87801, USA 4Department of Earth & Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131-1116, USA 5Department of Geology, Utah State University, Logan, Utah 84322-4505, USA 6Department of Aerospace Engineering Sciences, University of Colorado, Boulder, Colorado 80309-0429, USA ABSTRACT We use continuous measurements of GPS sites from across the Rio Grande Rift, Great Plains, and Colorado Plateau to estimate present-day surface velocities and strain rates. Velocity gradients from five east-west profiles suggest an average of ~1.2 nanostrains/yr east-west extensional strain rate across these three physiographic provinces. The extensional deformation is not concentrated in a narrow zone centered on the Rio Grande Rift but rather is distributed broadly from the western edge of the Colorado Plateau well into the western Great Plains. This unexpected pattern of broadly distributed deformation at the surface has important implications for our understanding of how low strain-rate deformation within continental interiors is accommodated. INTRODUCTION Global positioning system (GPS) monuments installed for the EarthScope Plate Boundary Observatory (PBO) and the Rio Grande Rift GPS experiment (Fig. 1) have greatly enhanced modern geodetic coverage of the physiographic regions of the Rio Grande Rift and the Colorado Plateau.
    [Show full text]
  • Legacy Image
    HEAT ElQW NJD THERPlAL PWXESSFS IN THE JOmADA DEL IIITE, NEW FIMICX) Marshall Reiter, New Mexico Bureau of Mines and Pjineral Resources, Socorro, IQl l-lost heat-f low data in rifts are uncertain largely because of hydrologic disturbances in regions of extensive fracturing. Estimates of heat flow in deep petroleum tests within a large basin of the Rio Grande rift, which has suffered little syn-rift fracturing, may begin to provide clearer insight into the relationships between high heat flow and crustal thinning processes. The Jornada del Lluerto is a large basin located in the Rio Grande rift of south- central New Ilexico. The region of interest within the Jornada del P4uerto is centered about 30 km east of the town of Truth or Consequences, and is approx- imately 60 km north-south by 30 km east-west (Figures la, lb). High heat flows are estimated for the region (1; Figure lb). Values increase from about 90 m~m-~in the northern part of the study area to about 125 m~m-~in the southern part. These high heat flows are rather enigmatic because in the immediate vicinities of the sites there is little evidence of Cenozoic volcan- ism or syn-rift extensional tectonics. Young basaltic volcanics (-2-3 Pla; 2) are present at distances of 10-20 km east of the high-flow sites. Even though geothermal anomalies are quite unlikely to be caused by magma conduits at sudh'distances, it is possible that information obtained from the volcanics can be related to the heat-flow data. Although most of the basalts along the Rio Grande rift appear to have risen quickly through the crust (3), some of the basalts at the western edge of the Jornada del Muerto show a modest amount of differentiation (4).
    [Show full text]
  • Synclinal-Horst Basins: Examples from the Southern Rio Grande Rift and Southern Transition Zone of Southwestern New Mexico, USA Greg H
    Basin Research (2003) 15 , 365–377 Synclinal-horst basins: examples from the southern Rio Grande rift and southern transition zone of southwestern New Mexico, USA Greg H. Mack,n William R. Seagern and Mike R. Leederw nDepartment of Geological Sciences, New Mexico State University, Las Cruces, New Mexico, USA wSchool of Environmental Sciences, University of East Anglia, Norwich, Norfolk, UK ABSTRACT In areas of broadly distributed extensional strain, the back-tilted edges of a wider than normal horst block may create a synclinal-horst basin.Three Neogene synclinal-horst basins are described from the southern Rio Grande rift and southernTransition Zone of southwestern New Mexico, USA.The late Miocene^Quaternary Uvas Valley basin developed between two fault blocks that dip 6^81 toward one another. Containing a maximum of 200 m of sediment, the UvasValley basin has a nearly symmetrical distribution of sediment thickness and appears to have been hydrologically closed throughout its history.The Miocene Gila Wilderness synclinal-horst basin is bordered on three sides by gently tilted (101,151,201) fault blocks. Despite evidence of an axial drainage that may have exited the northern edge of the basin, 200^300 m of sediment accumulated in the basin, probably as a result of high sediment yields from the large, high-relief catchments.The Jornada del Muerto synclinal- horst basin is positioned between the east-tilted Caballo and west-tilted San Andres fault blocks. Despite uplift and probable tilting of the adjacent fault blocks in the latest Oligocene and Miocene time,sedimentwas transported o¡ the horst and deposited in an adjacent basin to the south.
    [Show full text]
  • Field Trip Report
    The Ecological Society of America’s SEEDS Program SEEDS Field Trip Jornada Basin LTER Site, New Mexico October 6th-9th, 2011 Contents Introduction .................................................................................................................................... 3 Group 1: Jornada History Leiloni Begaye (leader), Landon Collins, Victor de Jesus-Reyes, Monica Erviti, Michael Hanft, Ezra Mutai ................................................. 3 Group 2: Debra Peter’s Presentation and Career Panel ............................................... 5 Group 3: Asombro Institute for Science Education ........................................................ 7 Joey Johnson (leader), Stacy Ortego, Danielle Perryman, Arjun Potter, Joshua Scholl and Brittany Stallworth ............................................................................. 7 Group Four: Goodbye Jornada Basin, LTER and White Sands Monument ........... 8 Natalia B. López (leader), Erin E. O’Brien, Michelle A. Nelson, Alisha Woodson ....................................................................................................................................... 8 Appendix A - ESA SEEDS Field Trip Itinerary ................................................................ 10 APPENDIX B – Field trip participants ............................................................................... 12 Appendix C – Evaluations .......................................... Error! Bookmark not defined. Introduction The 2011 SEEDS Fall Field Trip took place from October 6 –
    [Show full text]
  • Rock-Floor of Intermont Plains of the Aeid Region1
    BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA ROCK-FLOOR OF INTERMONT PLAINS OF THE AEID REG IO N 1 BY CHARLES E. KEYES (Read before the Society December SO, 1907) CONTENTS I’age Introductory ................................................................................................................ 03 Foundation of the arid plains................................................................................ 64 Definition of “bolson”........................................................................................ 64 Jornada del Muerto as the type................................................................. .. 65 Substructure of the Estancia plains.............................................................. 67 Las Vegas of N evada....................................................................................... 68 Inter-relationships of intermont plains of California.............................. .. 69 Course of the Colorado river.......................................................................... 70 Surface of the Colorado plateau.................................................................... 72 Bolsons of northern Mexico......................................................... .................... 72 Debris of the bolson plains.............................................................................. 73 Significance of a thinly mantled rock-floor...................................... ................... 74 Origin of the rock-floor surface.........................................................
    [Show full text]