DOCSLIB.ORG

2009 Federal Register, 74 FR 17287

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
2009 Federal Register, 74 FR 17287 Tuesday, April 14, 2009 Part II Department of the Interior Fish and Wildlife Service 50 CFR Part 17 Endangered and Threatened Wildlife and Plants; Designation of Critical Habitat for Peninsular Bighorn Sheep and Determination of a Distinct Population Segment of Desert Bighorn Sheep (Ovis canadensis nelsoni); Final Rule VerDate Nov<24>2008 16:48 Apr 13, 2009 Jkt 217001 PO 00000 Frm 00001 Fmt 4717 Sfmt 4717 E:\FR\FM\14APR2.SGM 14APR2 17288 Federal Register / Vol. 74, No. 70 / Tuesday, April 14, 2009 / Rules and Regulations DEPARTMENT OF THE INTERIOR designation of critical habitat for Service concluded in the morphology Peninsular bighorn sheep in this final and taxonomy section of the Recovery Fish and Wildlife Service rule. For more information on the Plan (USFWS 2000, p. 3) that the taxonomy, biology, and ecology of currently recognized subspecies for 50 CFR Part 17 Peninsular bighorn sheep, refer to the desert bighorn sheep, Ovis canadensis FWS–R8–ES–2007–0005; 92210–1117– final listing rule published in the nelsoni, includes the Peninsular bighorn 0000–B4 Federal Register on March 18, 1998 (63 sheep. This taxonomic placement was FR 13134), the original final critical recognized in the final critical habitat RIN 1018–AV09 habitat rule published in the Federal designation for the Peninsular bighorn Register on February 1, 2001 (66 FR sheep published in 2001 (USFWS 2001, Endangered and Threatened Wildlife 8650), the proposed rule to revise p. 8650). In that rule, we described the and Plants; Designation of Critical critical habitat published in the Federal range of the DPS as coincident with the Habitat for Peninsular Bighorn Sheep Register on October 10, 2007 (72 FR U.S. portion of the formerly recognized and Determination of a Distinct 57740), and the August 26, 2008 (73 FR Ovis canadensis cremnobates. The Population Segment of Desert Bighorn 50498), notice of availability of the draft current known range for the Peninsular Sheep (Ovis canadensis nelsoni) economic analysis (DEA) that bighorn sheep remains the same, as does AGENCY: Fish and Wildlife Service, announced revisions to the proposed its status as a DPS of the desert bighorn Interior. critical habitat designation. sheep (Ovis canadensis nelsoni). ACTION: Final rule. The listed entity treated in this rule is Regardless of its systematic affiliation, a DPS of desert bighorn sheep (Ovis the Peninsular bighorn sheep continues SUMMARY: We, the U.S. Fish and canadensis nelsoni). We will refer to to meet the criteria for consideration as Wildlife Service (Service), designate this entity as Peninsular bighorn sheep, a DPS. Within this document, we refer revised critical habitat for the or as a DPS (not species or subspecies). to the listed entity as a distinct Peninsular bighorn sheep, a distinct As stated in the October 10, 2007, population segment (DPS) of desert population segment (DPS) of desert proposed critical habitat rule, we are bighorn sheep (Ovis canadensis bighorn sheep (Ovis canadensis nelsoni) formally recognizing the listed entity as nelsoni), not as a subspecies as we did occupying the Peninsular Ranges of Peninsular bighorn sheep, a DPS of the within the discussion portion of the Southern California, under the desert bighorn sheep (Ovis canadensis October 10, 2007, proposed critical Endangered Species Act of 1973, as nelsoni). This is the currently accepted habitat rule. We will continue to use the amended (Act). In total, approximately taxonomic placement of these animals. common name Peninsular bighorn 376,938 acres (ac) (152,542 hectares We submitted this as a change for sheep when referring to this DPS. No (ha)) fall within the boundaries of the inclusion in the Code of Federal discussions or references to the critical habitat designation. This revised Regulations (CFR). The taxonomic Peninsular bighorn sheep DPS are designation of critical habitat for revision does not affect discreteness and intended to apply to any other portions Peninsular bighorn sheep reduces the significance of Peninsular bighorn sheep of the range (e.g., San Bernardino 2001 designation by approximately as a DPS. In the 1998 final listing rule, Mountains, Joshua Tree National Park, 467,959 ac (189,377 ha). The revised Peninsular bighorn sheep were listed as the desert mountains of southwestern critical habitat is located in Riverside, a DPS of the species Ovis canadensis. At Nevada and northwestern Arizona) of San Diego, and Imperial Counties, the time of listing at least six subspecies the desert bighorn sheep (Ovis California. of bighorn sheep (Ovis canadensis) were canadensis nelsoni). For a detailed named, including Ovis canadensis discussion of the DPS analysis for DATES: This rule becomes effective on cremnobates, which is a name that Peninsular bighorn sheep, see the May 14, 2009. previously had been applied to the Distinct Vertebrate Population Segment ADDRESSES: The final rule, final Peninsular bighorn sheep. However, section of the 1998 final listing rule economic analysis, and map of critical because of ongoing questions regarding (March 18, 1998, 63 FR 13134). habitat will be available on the Internet the distinctiveness of the subspecific Therefore, we are changing the listed at http://www.regulations.gov. taxa at that time, the Peninsular Ranges entity from a DPS of the species Ovis Supporting documentation we used in population was considered a distinct canadensis, to a DPS of the subspecies preparing this final rule will be population segment (DPS) of the species Ovis canadensis nelsoni. This final rule available for public inspection, by O. canadensis rather than as a includes a change to the List of appointment, during normal business subspecies or a DPS of a particular Endangered and Threatened Wildlife at hours, at the U.S. Fish and Wildlife subspecies. 50 CFR 17.11(h) to reflect this change. Service, Carlsbad Fish and Wildlife Relevant information regarding the Office, 6010 Hidden Valley Road, Suite systematic relationships of the DPS Description, Life History, #101, Carlsbad, CA 92011; telephone infraspecific (below species rank) taxa Distribution, Ecology, and Habitat 760–431–9440; facsimile 760–431–5901. of bighorn sheep at or near the time of No new substantial information FOR FURTHER INFORMATION CONTACT: Jim listing was based on morphometric pertaining to the DPS description, life Bartel, Field Supervisor, U.S. Fish and (variation in size and shape) history, ecology, or habitat of Peninsular Wildlife Service, Carlsbad Fish and assessments, as well as molecular bighorn sheep was received following Wildlife Office (see ADDRESSES section). analyses, such as mitochondrial DNA the 2007 proposed rule to revise critical If you use a telecommunications device (mtDNA) assessments (Wehausen and habitat for this DPS. Therefore, please for the deaf (TDD), call the Federal Ramey 1993; Ramey 1993; Ramey 1995; refer to the final listing rule published Information Relay Service (FIRS) at Boyce et al. 1999) and microsatellite in the Federal Register on March 18, 800–877–8339. and histocompatibility complex loci 1998 (63 FR 13134), and the proposed SUPPLEMENTARY INFORMATION: analysis (Boyce et al. 1997; Gutierrez- rule to revise critical habitat published Espeleta et al. 1998). While the in the Federal Register on October 10, Background discriminatory value of these various 2007 (72 FR 57740), for a discussion of It is our intent to discuss only those approaches was not addressed in the the DPS’s description, life history, topics directly relevant to the recovery plan (USFWS 2000), the ecology, and habitat. VerDate Nov<24>2008 16:48 Apr 13, 2009 Jkt 217001 PO 00000 Frm 00002 Fmt 4701 Sfmt 4700 E:\FR\FM\14APR2.SGM 14APR2 Federal Register / Vol. 74, No. 70 / Tuesday, April 14, 2009 / Rules and Regulations 17289 DPS Distribution changes to the proposed rule. We conservation biology principles. We During the first public comment accepted public comments during the received responses from all five of the period for the proposed rule, we second open comment period for 60 peer reviewers. We reviewed all comments received received new information regarding days, ending October 27, 2008. For more from the peer reviewers and the public occurrence data that had been collected information on previous Federal actions for substantive issues and new within the past year. The areas in which concerning Peninsular bighorn sheep, information regarding critical habitat for new sheep occurrence data was received refer to the final listing rule published Peninsular bighorn sheep. These include the South Santa Rosa in the Federal Register on March 18, comments are addressed below and Mountains along Grave Wash and the 1998 (63 FR 13134), the final critical incorporated into the final rule as Jacumba Mountains near Interstate 8. habitat designation published in the Federal Register on February 1, 2001 appropriate. The occurrence data received falls (66 FR 8650), and the proposed rule to within the boundary of the 2001 critical Peer Reviewer Comments revise critical habitat published in the habitat designation and the 2000 Federal Register on October 10, 2007 Comment 1: Several peer reviewers Recovery Plan area; therefore, we do not (72 FR 57740). stated the proposed critical habitat is believe this new information markedly flawed because it does not provide for affects the known distribution of Summary of Comments and connectivity. One peer reviewer stated Peninsular bighorn sheep. However, we Recommendations further that the proposal fragments the considered this new occurrence data We
Load more

Recommended publications
  • Right-Sljp Offset of the Eocene Ballena River Valley Across the Elsinore Fault Zone, Southern California
    http://dx.doi.org/10.7773/cm.v9i1.412 RIGHT-SLJP OFFSET OF THE EOCENE BALLENA RIVER VALLEY ACROSS THE ELSINORE FAULT ZONE, SOUTHERN CALIFORNIA Patrick L. Abbott Ronald P. Kies Dermis R. Kerr Department of GeologicaI Sciences San Diego State University San Diego, California 92182 U. S. A. ABSTRACT TWO small paleovalleys carved into granitic rocks of the Peninsular Ranges contain conglomerates similar to the Eocene Ballena Gravels farther west in San Diego County. These conglomerates are dominated by the distinctive, temporally restricted, Poway rhyolite clasts. The newly discovered fluvial conglomerates lie in the Vallecito Mountains east of the Elsinore fault zone. Extrapolation of the offset fluvial valley trends to the Elsinore fault suggests 37 kilometers (23 miles) of right slip. RESUMEN Dos valles pequeños paleolíticos, grabados en cuerpos graníticos de la Cor- dillera Peninsular, contienen conglomerados semejantes a las gravas de la Forma- ción Ballena del Eoceno, localizada al peste, en el Condado de San Diego. Este conglomerado es dominado por clastos riolíticos de la Formación Poway, los cuales son característicos y están temporalmente restringidos. Los conglomerados fluviales recientemente descubiertos, se encuentran en las Montanas del Vallecito, al este de la zona de la falla de Elsinore. Proyectando los rumbos de los conglome- rados fluviales y de las gravas a través de la falla de Elsinore, se observa un despla- zamiento de 37 km. (23 millas) en un sentido lateral-derecho. INTRODUCTION The Ballena Gravels (actually conglomerate ) were named by Fairbanks (1893) for a prominent, southwest-trending line of outcrops on the western flank of the batholithic Peninsular Ranges in San Diego County (figure 1).
    [Show full text]
  • Anza-Borrego Desert State Park Bibliography Compiled and Edited by Jim Dice
    Steele/Burnand Anza-Borrego Desert Research Center University of California, Irvine UCI – NATURE and UC Natural Reserve System California State Parks – Colorado Desert District Anza-Borrego Desert State Park & Anza-Borrego Foundation Anza-Borrego Desert State Park Bibliography Compiled and Edited by Jim Dice (revised 1/31/2019) A gaggle of geneticists in Borrego Palm Canyon – 1975. (L-R, Dr. Theodosius Dobzhansky, Dr. Steve Bryant, Dr. Richard Lewontin, Dr. Steve Jones, Dr. TimEDITOR’S Prout. Photo NOTE by Dr. John Moore, courtesy of Steve Jones) Editor’s Note The publications cited in this volume specifically mention and/or discuss Anza-Borrego Desert State Park, locations and/or features known to occur within the present-day boundaries of Anza-Borrego Desert State Park, biological, geological, paleontological or anthropological specimens collected from localities within the present-day boundaries of Anza-Borrego Desert State Park, or events that have occurred within those same boundaries. This compendium is not now, nor will it ever be complete (barring, of course, the end of the Earth or the Park). Many, many people have helped to corral the references contained herein (see below). Any errors of omission and comission are the fault of the editor – who would be grateful to have such errors and omissions pointed out! [[email protected]] ACKNOWLEDGEMENTS As mentioned above, many many people have contributed to building this database of knowledge about Anza-Borrego Desert State Park. A quantum leap was taken somewhere in 2016-17 when Kevin Browne introduced me to Google Scholar – and we were off to the races. Elaine Tulving deserves a special mention for her assistance in dealing with formatting issues, keeping printers working, filing hard copies, ignoring occasional foul language – occasionally falling prey to it herself, and occasionally livening things up with an exclamation of “oh come on now, you just made that word up!” Bob Theriault assisted in many ways and now has a lifetime job, if he wants it, entering these references into Zotero.
    [Show full text]
  • 2020-Jan-Feb.Pdf
    Myers, Dave Taylor, Ryan Lynch and myself. At the May Angeles Chapter Awards Banquet, Hundred Peak Section will receive the Citation of Merit. This is awarded to an Angeles Chapter entity for its help and support in Angeles Chapter activities and achievement of goals. This award is not often given out. We earned it. How cool is that! I am looking forward to all of you that have earned HPS certificates to come to the HPS Awards Banquet. Your attendance makes our Section strong. Happy Hiking. Mike Dillenback HPS Chair HUNDRED PEAKS SECTION MEMBERSHIP REPORT November/December 2019 Michael McCarty, HPS Membership Chair New Members Donations 19 Life Members Jazmin Ortega Gary Bowen - $6 211 Members Steve Cielinski Mat Kelliher - $26 22 Household John Sheehe David Comerzan - $20 16 Subscribers Gordon Jenkins 268 Lisa Sanford 100 Peaks Emblem #1213 - Amy Huang - Sam Fink Peak - 11/2/2019 #1214 - Terri Straub - Chaparrosa Peak - 12/8/2019 #1215 - John Martin - Wright Mountain - 11/2/2019 200 Peaks Bar #505 - YoungOk Lee - Lion Peak - 10/21/2019 #506 - Louie Rodriguez - Butterbredt Peak - 1//2019 First List Completion #328 - Robert Luher - Eagle Crag - 11/24/2019 #329 - Eric Chu - Mount Inspiration - 12/7/2019 Second List Completion #66 - Jinoak Chung - Southwell Peak - 12/21/2019 Third List Completion #37 - George Christiansen - Owens Peak - 11/4/2019 Pathfinder Emblem - 200 #23 - George Christiansen - Owens Peak - 11/4/2019 One Thousand Peaks #28 - George Christiansen - Owens
    [Show full text]
  • Soleglad, Fet & Lowe: Hadrurus “Spadix” Subgroup 17
    Soleglad, Fet & Lowe: Hadrurus “spadix” Subgroup 17 Figures 31–33 Comparisons of Hadrurus obscurus and H. spadix, metasomal segments II–III, ventral view, showing diagnostic setation located between the ventromedian (VM) carinae. 31. H. obscurus, male (pale phenotype, segment II length = 8.44 mm, segment III length = 9.26 mm), Bird Spring Canyon Road, Kern Co., California, USA. 32. H. obscurus, female (dark phenotype, segment II length = 5.02 mm, segment III length = 5.70 mm), Bird Spring Canyon Road, Kern Co., California, USA. 33. H. spadix, female (segment II length = 7.87 mm, segment III length = 8.36 mm), Apex Mine in Curly Hollow Wash, Washington Co., Utah, USA. 19). However, to support our suspicion, we have ex- As stated above the positions and numbers of chelal amined two H. obscurus specimens collected from the internal trichobothria are essentially identical in Ha- same locality where one has a carapace pattern of H. drurus obscurus and H. spadix, while both numbers and spadix and the other a pattern typical of H. obscurus (see positions differ in H. anzaborrego (see Fig. 19). H. Fig. 20 for color closeup images of these carapaces, and anzaborrego has three internal accessory trichobothria Figs. 9–10 for overall comparison with “arizonensis” whereas the other two species have two. Statistics group species). Based on these data, we suggest here that involving over 250 samples show that these numerical these carapacial pattern differences are analogous to differences are observed in over 87 % of the specimens those exhibited by the dark and pale phenotypes of H. examined (Fig.
    [Show full text]
  • Stratigraphic Record of Pleistocene Initiation and Slip, Coyote Creek Fault
    Geological Society of America Special Paper 365 2002 Stratigraphic record of Pleistocene initiation and slip on the Coyote Creek fault, Lower Coyote Creek, southern California Rebecca J. Dorsey* Department of Geological Sciences, 1272 University of Oregon, Eugene, Oregon 97403-1272, USA ABSTRACT The Coyote Creek fault is a major strand of the San Jacinto fault zone in southern California. Pleistocene sediments and sedimentary rocks exposed in the lower Coyote Creek area preserve a record of surface deformation, stream reorganization, and erosion that resulted from initiation and slip on the Coyote Badlands strand of the Coyote Creek fault. A well-exposed section of conglomerate and sandstone contains the 760 ka Bishop Ash and reveals (1) complete reversal of paleocurrents from north- west-directed (opposed to modern drainages) to southeast-directed (consistent with modern drainages); (2) fanning dips and a progressive unconformity bounded by the Coyote Creek and Box Canyon faults; (3) a thick gravel unit (Qg) that caps the fanning-dip section and accumulated between ca. 700 and 600 ka; and (4) post-Qg offset and deep erosion of the entire section. The fanning dips and reversal of paleo- currents are interpreted to record initiation of the Box Canyon and Coyote Creek faults by dip-slip (normal) displacement beginning at 750 ka. Strike-slip offset of Qg is equal to total offset on the Coyote Creek fault in the study area (ϳ6 km), indicating that strike-slip motion on the fault began after deposition of Qg, after ca. 600 ؓ 100 ka. This gives a time-averaged slip rate in Coyote Creek of ϳ10 mm/yr.
    [Show full text]
  • Peninsular Bighorn Sheep Recovery 2011 Annual Report
    CALIFORNIA DEPARTMENT OF FISH AND GAME PENINSULAR BIGHORN SHEEP RECOVERY 2011 ANNUAL REPORT A cooperative effort by the California Department of Fish and Game, U.S. Fish and Wildlife Service, and California Department of Parks and Recreation Photo By Janene Colby This report presents information on the status, distribution, and management of peninsular bighorn sheep in eastern San Diego County and portions of Riverside and Imperial Counties, California, from January 1, 2011 through December 31, 2011. Report prepared by Janene Colby and Randy Botta TABLE OF CONTENTS SUMMARY...…………………………………………………………………………… 2 PROJECT PERSONNEL……………………………………………………………… 3 CDFG Resource Management and Air Services Divisions…........................... 3 CDFG South Coast Region………………………….……..……………...…… 3 RECOVERY PROGRAM OVERVIEW Telemetry Monitoring…..……………………….………….……………..…… 4 Population Size and Estimation…...………………………….…………..……. 5 Distribution and Movement………….…………………………………...…..... 7 Central Santa Rosa Mountains…………………………………….....…... 7 Southern Santa Rosa Mountains…………..……………………...……… 7 Coyote Canyon........................................................................................... 7 Northern San Ysidro Mountains……………………..…………...……… 9 Southern San Ysidro Mountains…………………….…………...………11 Vallecito Mountains.....……………………………………..……...…….13 Carrizo Canyon…...…………………………………………………….. 15 Survivorship….…………………………………...………………………..….. 17 Lamb Mortality Monitoring………..……………………………………...…. 19 2012 PROPOSED ACTIVITIES …………………………………………………... 19 1 SUMMARY This report
    [Show full text]
  • California Department of Fish and Wildlife Peninsular Bighorn Sheep Annual Report 2015
    CALIFORNIA DEPARTMENT OF FISH AND WILDLIFE PENINSULAR BIGHORN SHEEP 2015 ANNUAL REPORT A cooperative effort by the California Department of Fish and Wildlife, U.S. Fish and Wildlife Service, and California Department of Parks and Recreation Photo by Janene Colby This report presents information on the status, distribution, and management of peninsular bighorn sheep in eastern San Diego County and portions of Riverside and Imperial Counties for 2015 Authors Janene Colby and Randy Botta South Coast Region California Department of Fish and Wildlife Peninsular Bighorn Sheep Annual Report 2015 Table of Contents Executive Summary………………………………………………...1 Background……………………………………………………….......3 Capture and Radio-collaring……………………………………3 Radio Collar Status………………………………………………….4 Population Size and Estimation…………………….………..5 Respiratory Disease………………………………………………..5 Cause Specific Mortality and Survival……………………..6 Lamb Survival and Recruitment……………………………...8 Distribution and Movement………………………………….11 San Jacinto Mountains………………………………………...12 Central Santa Rosa Mountains………………………........12 Southern Santa Rosa Mountains……………………….....15 Vallecito Mountains………………………………………......16 Threats to Recovery………………………………………….….17 San Jacinto Mountains…………………………................17 Northern Santa Rosa Mountains………………………….17 Central Santa Rosa Mountains………………….……...…17 Southern Santa Rosa Mountains…………………….……19 Coyote Canyon…………………………………………….….…19 Northern San Ysidro Mountains………………….….…...19 Southern San Ysidro Mountains……………………..…...20 Vallecito Mountains……………………………………………20
    [Show full text]
  • CH1-13: Some Characteristics of the Eastern Peninsular Ranges
    I SOME ~ CHARACTERISTICS OF THE EASTERN PENINSULAR bY Robert V. Sharp U.S. Geological Survey 345 Middlefield Road Menlo Park, California 940 Amajor regional belt of pervasively sheared cataclastic rocks, here termed th e eastern Peninsular Ranges mylonite zone, is the subject of this paper. T he regional characteristics of these mylonitic rocks, as well as a set of younger thrust faults that are spatially and temporally associated with them are briefly described. This discussion is preliminary with regard to the detailed structure of the cataclastic zone; most of the zone has been studied only in r ough reconnaissance. Detailed petrofabric studies of the mylonitic rocks hav e been made only at Coyote Mountain, north of Borrego Valley, by Theodore (1966, 1970). Brief descriptions of the regional distribution and some tectonic implications of the cataclastic rocks have been made by Sharp (1966, 19 67, 1968). Work on this zone by the author is continuing. In the discussion to follow, the locations of named geographic landmarks and geolo gic features are shown in the map of Figure 1, or explained in its caption. GEOGRAPHY AND GEOMETRY OF THE EASTERN PENINSULAR MYLONITE ZONE As d epicted in Figure 1, the cataclastic rocks of the mylonite zone extend fr om the latitude of Palm Springs southward about 80 km to the North Pinyon Moluntains. The planar structure or foliation of the rocks dips generally' in the range 300 to 600 toward the east or northeast, but locally a,nd to a minor extent in other directions. What is most remarkable about theI orientation of this zone is its approximately north-northwest average s trike, coinciding with the trend of the eastern margin of the Peninsulalr Ranges through its linear 1500 km extent from Palm Springs to the tip of Baija California.
    [Show full text]
  • Geological Society of America Bulletin
    Downloaded from gsabulletin.gsapubs.org on 28 April 2009 Geological Society of America Bulletin Early Pleistocene initiation of the San Felipe fault zone, SW Salton Trough, during reorganization of the San Andreas fault system Alexander N. Steely, Susanne U. Janecke, Rebecca J. Dorsey and Gary J. Axen Geological Society of America Bulletin 2009;121;663-687 doi:10.1130/B26239.1 E-mail alerting services click www.gsapubs.org/cgi/alerts to receive free e-mail alerts when new articles cite this article Subscribe click www.gsapubs.org/subscriptions/index.ac.dtl to subscribe to Geological Society of America Bulletin Permission request click http://www.geosociety.org/pubs/copyrt.htm#gsa to contact GSA Copyright not claimed on content prepared wholly by U.S. government employees within scope of their employment. Individual scientists are hereby granted permission, without fees or further requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in subsequent works and to make unlimited copies of items in GSA's journals for noncommercial use in classrooms to further education and science. This file may not be posted to any Web site, but authors may post the abstracts only of their articles on their own or their organization's Web site providing the posting includes a reference to the article's full citation. GSA provides this and other forums for the presentation of diverse opinions and positions by scientists worldwide, regardless of their race, citizenship, gender, religion, or political viewpoint. Opinions presented in this publication do not reflect official positions of the Society.
    [Show full text]
  • Stratigraphy, Tectonics, and Basin Evolution in the Anza-Borrego Desert Region
    Anza - C05 Stratigraphy 10/28/05 3:21 PM Page 89 Stratigraphy, Tectonics, and 5Basin Evolution in the Anza-Borrego Desert Region The most beautiful thing we can experience is the mysterious; It is the source of all true art and all science. Albert Einstein Rebecca Dorsey 89 Anza - C05 Stratigraphy 10/28/05 3:22 PM Page 90 Stratigraphy, Tectonics, and Basin Evolution in the Anza-Borrego Desert Region Southern Borrego Badlands Looking West. (Photograph by Rebecca Dorsey) Introduction The fossil record of past life is commonly preserved in ancient sedi- ments and sedimentary rocks. Sediments accumulate in subsiding basins that contain different kinds of depositional environments such as rivers, lakes, deltas, and marine seaways. These environments are friendly to life, and often support assemblages of plants and animals. Through integrative studies of stratigraphy, sedimentology, and paleontology, we can reconstruct ancient life communities and the environments in which they lived. Plate tectonic forces determine where sedimentary basins form, how long and how fast sediments accumulate, and how they may later be faulted, uplifted, and eroded at the surface. Climate also affects basins and sediments; precipitation, wind, and temperature variation affect surface processes such as erosion and soil formation. In the Salton Trough region of southern California, styles, rates, and environments of basin formation have evolved through time in response to complex changes in driving tectonic forces, fault interactions, and climate change. Because of the rich history of geologic research in Anza- Borrego Desert State Park and adjacent areas, it is impossible to summarize all of the knowledge on this subject in a few pages.
    [Show full text]
  • Peninsular Bighorn Sheep Recovery 2012 Annual Report
    CALIFORNIA DEPARTMENT OF FISH AND WILDLIFE PENINSULAR BIGHORN SHEEP 2012 ANNUAL REPORT AND RECOVERY PROGRAM REVIEW 1993 - 2012 A cooperative effort by the California Department of Fish and Wildlife, U.S. Fish and Wildlife Service, and California Department of Parks and Recreation Jeff Young This report presents information on the status, distribution, and management of peninsular bighorn sheep in eastern San Diego County and portions of Riverside and Imperial Counties, California Report prepared by Janene Colby and Randy Botta TABLE OF CONTENTS BACKGROUND...…………………………………………………………………………………2 PROJECT PERSONNEL…………………………………………………………………………3 RECOVERY PROGRAM OVERVIEW Capture and Radiocollaring.……………..……………………….………….……………..….…3 Population Monitoring……………………………………………………………………………4 Population Size and Estimation…………………………………………………………….…….5 Central Santa Rosa Mountains……………………………………................................…...6 Southern Santa Rosa Mountains…………..…………………………………..…...…….…6 Coyote Canyon.......................................................................................................................6 Northern San Ysidro Mountains……………………..………….............................…….…7 Southern San Ysidro Mountains……………………..……………………………...……...7 Vallecito Mountains.....……………………………….……………………….……...….…8 Carrizo Canyon…...………………………………………………………………………...8 Distribution and Movement….…………………………………...………………………....…....8 Central Santa Rosa Mountains……………………………………...............................…... 9 Southern Santa Rosa Mountains…………..…………………………………..…...…….…9
    [Show full text]
  • Mineral Resources of the Santa Rosa Mountains Wilderness Study Area, Riverside County, California
    Mineral Resources of the Santa Rosa Mountains Wilderness Study Area, Riverside County, California U.S. GEOLOGICAL SURVEY BULLETIN 17.10-D AVAILABILITY OF BOOKS AND MAPS OF THE U.S. GEOLOGICAL SURVEY Instructions on ordering publications of the U.S. Geological Survey, along with prices of the last offerings, are given in the cur­ rent-year issues of the monthly catalog "New Publications of the U.S. Geological Survey." Prices of available U.S. Geological Sur­ vey publications released prior to the current year are listed in the most recent annual "Price and Availability List." Publications that are listed in various U.S. Geological Survey catalogs (see back inside cover) but not listed in the most recent annual "Price and Availability List" are no longer available. Prices of reports released to the open files are given in the listing "U.S. Geological Survey Open-File Reports," updated month­ ly, which is for sale in microfiche from the U.S. Geological Survey, Books and Open-File Reports Section, Federal Center, Box 25425, Denver, CO 80225. Reports released through the NTIS may be obtained by writing to the National Technical Information Service, U.S. Department of Commerce, Springfield, VA 22161; please include NTIS report number with inquiry. Order U.S. Geological Survey publications by mail or over the counter from the offices given below. BY MAIL OVER THE COUNTER Books Books Professional Papers, Bulletins, Water-Supply Papers, Techniques of Water-Resources Investigations, Circulars, publications of general in­ Books of the U.S. Geological
    [Show full text]