DOCSLIB.ORG

Western Association of Vertebrate Paleontology Annual Meeting: Program with Abstracts

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

UC Berkeley PaleoBios Title Western Association of Vertebrate Paleontology Annual Meeting: Program with Abstracts Permalink https://escholarship.org/uc/item/3km3d2wm Journal PaleoBios, 33(0) ISSN 0031-0298 Authors Ingwall, Joanne S. Jefferson, George T. Beck, Myrl Publication Date 2016-02-11 DOI 10.5070/P9331030039 Peer reviewed eScholarship.org Powered by the California Digital Library University of California PaleoBios 33 Supplement:1–35, February 11, 2016 WESTERN ASSOCIATION OF VERTEBRATE PALEONTOLOGY ANNUAL MEETING PROGRAM WITH ABSTRACTS ANZA-BORREGO DESERT STATE PARK® Borrego SprIngs, CA FebrUARY 13–14, 2016 Host Committee: Lyndon K Murray and George T Jefferson Colorado Desert District Stout Research Center Joanne S Ingwall and Myrl Beck Anza-Borrego Desert State Park® Anza-Borrego Desert State Park® Paleontology Society The Anza-Borrego Foundation University of California Irvine Steele/Burnand Anza-Borrego Desert Research Center Citation: Ingwall, J.S., Jefferson, G.T., and Beck, M. (eds.). 2016. Western Association of Vertebrate Paleontology Annual Meeting: Program with Abstracts. PaleoBios 33 Supplement. ucmp_paleobios_30039 Permalink: http://escholarship.org/uc/item/3km3d2wm Copyright: Items in eScholarship are protected by copyright, with all rights reserved, unless otherwise indicated. PALEOBIOS, VOL. 33, SUPPLEMENT, FEBRUARY 2016 ORAL PRESENTATIONS 8:30-8:45 am WELCOME 8:45-9:00 Thomson et al. Potential Research Avenues Provided by Cretaceous, Cedar a Nine-Ton Field Jacket Containing Baby, Mountain Formation Juvenile and Adult Utahraptors (Theropoda; Dromaeosauridae) 9:00-9:15 Gensler Working in Wilderness Areas and Wilderness Cretaceous, Fruitland/ Study Areas: The Removal of Two Pentaceratops Kirtland Formation Partial Skeletons by Helicopter 9:15-9:30 Wedel et al. Pneumatic Diverticula Associated with the Spinal Cretaceous/Paleocene, Cord in Birds, Sauropod Dinosaurs, and Other Cloverly and Black Hills Ornithodiran Archosaurs Formations 9:30-9:45 Scherzer An Archaic Mysticetid from The Vaqueros Oligocene/Miocene, Formation, and Other Fossil Material from The Vaqueros Formation, Skyridge Project, Orange County, CA invertebrates, cetaceans 9:45-10:00 Zhang Deflating The Taxonomic Diversity ofMerycodus Miocene, Valentine and (Family: Antilocapridae) Barstow Formations 10:00-10:30 BREAK AND POSTER VIEWING 10:30-10:45 Bevers The Milk Creek Fauna: a Late Miocene Mammal Miocene, Milk Creek AZ, Site from Central Arizona faunal diversity 10:45-11:00 Sankey et al. Survival of the Tuskiest: Giant, Tusk-Toothed Miocene/Pliocene, Salmon from California west coastal marine vs. freshwater deposits 11:00-11:15 Wagner et al. An Early Pliocene Microtine Rodent from Pliocene, San Joaquin the Lower San Joaquin Formation from Formation, microfossil the Kettleman Hills Facility, Kings County, fauna California 11:15-11:30 Chandler et al. The Terror Bird, Titanis (Phorusrhacidae) from Pliocene, Salton Trough Pliocene Olla Formation, Anza-Borrego Desert State Park, Southern California 11:30-11:45 Gilbert J Tracking the Tracks with Photogrammetry Photogrammetry 11:45-12:00 Molnar Cognitive Bias in Paleontology cognitive bias Noon –2 pm LUNCH AND POSTER VIEWING 2:00-2:15 Murray and Data Improvement: Repairing Data Errors in a repairing data errors in Gilbert L Vertebrate Paleontology Collection paleontology collections 2:15-2:30 Lindsay and Widespread Collagen Radiocarbon Date Quaternary, radiocarbon Stafford Contamination Resolved Through XAD Resin dating contamination Purification 2:30-2:45 Stewart and Pleistocene Paleosol Developed on Ancestral Pleistocene, Mojave Hakel Mojave River Sediments Near Hinkley CA River 2 2016 WAVP PROGRAM & ABSTRACTS 2:45-3:00 Springer et al. The Paleoclimate, Paleohydrology and Vertebrate Pleistocene, Tule Springs Paleontology of Tule Springs Fossil Beds Nationl Fossil Beds National Monument Monument, radioisotope dating 3:00 – 3:30 BREAK AND POSTER VIEWING 3:30-3:45 Demere et al. A Middle Pleistocene Mammoth (Mammuthus Pleistocene, San Diego columbi) from the Coastal Plain of San Diego CA County, California 3:45-4:00 Dooley and How small Are California Mastodons, Really? Pleistocene, North Scott America 4:00-4:15 McDonald Eremotherium Bones and the Cenote of Doom: Pleistocene, Belize New Pleistocene Records from Belize cenotes 4:15-4:30 Murray et al. A New Fossil Assemblage in the Anza-Borrego Pleistocene, Carrizo Desert Badlands in the Anza- Borrego Desert 4:30-4:45 CLOSING REMARKS SELECTION OF 2017 WAVP VENUE POSTER PRESENTATIONS Poster # 1 Homidan and Late Eocene Ischyromids from Pipestone Springs, Eocene, Pipestone Lofgren Montana Springs Main Pocket 2 Jamal and Dental Pathology in Hoplophoneus occidentalis Oligocene, Brule Farke (Nimravidae) Formation, 3 Senise and A Proboscidean Trackway from the Barstow Miocene, Barstow Farke Formation of Southern California Formation, photogrammetry 4 Chu et al. Reinterpretation of Felid Footprints from the Miocene, Barstow Barstow Formation (Miocene) of Southern Formation, California photogrammetry 5 Weideman et Paleontology of Arizona and the Milk Creek Miocene, Mill Creek AZ, al. Fossils analysis of vertebrate taxa 6 Wilson et al. Depositional Environments of the Turlock Miocene/Pliocene, Lake Paleoflora, Upper Mehrten Formation Turlock Lake CA, (Mio-Pliocene), Northern San Joaquin Valley, Mehrten Formation, California paleoflora 7 Borce et al. Intraspecific Variation in Cranial And Pliocene, San Diego Mandibular Morphology of the Extinct River Formation Dolphin Parapontoporia sternbergi from the Upper Pliocene San Diego Formation, Southern California 3 PALEOBIOS, VOL. 33, SUPPLEMENT, FEBRUARY 2016 8 Potapova The Taphonomy of the Avian Remains in the Pleistocene, Matuzka Northwestern Caucasus, Russia, and the Late Cave Russia Pleistocene (Mis 4-2) Environmental Changes 9 Potapova Taphonomy of the Bird Remains from the Pleistocene, Medvezhya Postglacial Horizons of the Medvezhya Cave in Cave in Russia the Northern Urals, Russia 10 Friedman et al. The Irvingtonian Type Locality (Alameda County Pleistocene, Irvingtonian, California), a Historical Perspective San Francisco Bay, fossil collection history, Boy Paleontologists of Hayward 11 Glenister and New Rancholabrean Mammal Fossil Site from Pleistocene, Walker Warm Springs District, Fremont, California Rancholabrean, Warm Springs District of CA 12 Fox and Blois Preliminary Analysis of Small Mammal Fossils Pleistocene, Rancho from “Project 23” at Rancho La Brea, Los La Brea, plant, pollen, Angeles CA microfauna 13 Rowland and Age Profile of Terminal Pleistocene Columbian Pleistocene, Tule Springs Parry Mammoths from the Tule Springs Fossil Beds of Fossil Beds, Mammuthus Southern Nevada columbi, teeth 14 Jackson- North America Research Group (NARG) North America Research Shannon Group 4 2016 WAVP PROGRAM & ABSTRACTS THE MILK CREEK FAUNA: A LATE MIOCENE of these characters are quantified by the following 15 skull MAMMAL SITE FROM CENTRAL ARIZONA measurements: left and right zygomatic process length, BEVERS, Jeb, Department of Biology, Yavapai College, neurocranium width and length, left and right temporal Prescott, AZ, USA fossa width, left and right temporal fossa height, left and The Milk Creek fossil site (late Miocene) of Yavapai right orbital length, width of rostrum at base, rostrum County, Arizona was first announced by Reed (1950) length, zygomatic width, width of rostrum at midpoint, from a joint collecting expedition between the Museum and total length. Measurements were taken on each of the of Northern Arizona and the University of Arizona. After 16 specimens. For each of the skull measurements, means a brief hiatus, ongoing collections of the Milk Creek site and standard deviations were calculated for P. sternbergi have continued to the present time. The largest of these (n=3) and P. blainvillei (n=13). From these data, coef- holdings is in the Frick Collections of fossil mammals held ficients of variation (CV) were calculated for each skull at the American Museum of Natural History. Most of the measurement. Relatively high CV values for neurocranium other collections are in regional museums across Arizona. length and both temporal fossae heights in P. sternbergi A recent examination of these collections permitted a could suggest that the fossil sample contains more than more comprehensive description of the known diversity one species. However, relatively similar CV values for of the Milk Creek mammal assemblage. This examination the remaining skull measurements would argue against also located two previously unreported taxa from the site, this. Left and right side skull differences in CV values in including a canid Leptocyon sp. and a large camelid distinct the fossil sample suggest the possibility of greater cranial from the two more common camelids from the genera asymmetry in P. sternbergi. Michenia and Protolabis. A current analysis of the Milk Creek fauna diversity is presented. THE TERROR BIRD, TITANIS (PHORUSRHACI- DAE), FROM PLIOCENE OLLA FORMATION, INTRASPECIFIC VARIATION IN CRANIAL AND ANZA-BORREGO DESERT STATE PARK®, MANDIBULAR MORPHOLOGY OF THE EX- SOUTHERN CALIFORNIA TINCT RIVER DOLPHIN PARAPONTOPORIA CHANDLER, Robert M., JEFFERSON, George T., LINDSAY, STERNBERGI FROM THE UPPER PLIOCENE SAN Lowell, and VESCERA, Susan P., Colorado Desert District Stout Research Center, Borrego Springs, CA, USA DIEGO FORMATION, SOUTHERN CALIFORNIA BORCE, Bridget, San Diego State University, San Diego, CA, During the Great American Biotic Interchange that took USA; DEMÉRÉ, Thomas A., San Diego Museum
Recommended publications
  • Isthminia Panamensis, a New Fossil Inioid (Mammalia, Cetacea) from the Chagres Formation of Panama and the Evolution of ‘River Dolphins’ in the Americas

    Isthminia Panamensis, a New Fossil Inioid (Mammalia, Cetacea) from the Chagres Formation of Panama and the Evolution of ‘River Dolphins’ in the Americas

    Isthminia panamensis, a new fossil inioid (Mammalia, Cetacea) from the Chagres Formation of Panama and the evolution of ‘river dolphins’ in the Americas Nicholas D. Pyenson1,2, Jorge Velez-Juarbe´ 3,4, Carolina S. Gutstein1,5, Holly Little1, Dioselina Vigil6 and Aaron O’Dea6 1 Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC, USA 2 Departments of Mammalogy and Paleontology, Burke Museum of Natural History and Culture, Seattle, WA, USA 3 Department of Mammalogy, Natural History Museum of Los Angeles County, Los Angeles, CA, USA 4 Florida Museum of Natural History, University of Florida, Gainesville, FL, USA 5 Comision´ de Patrimonio Natural, Consejo de Monumentos Nacionales, Santiago, Chile 6 Smithsonian Tropical Research Institute, Balboa, Republic of Panama ABSTRACT In contrast to dominant mode of ecological transition in the evolution of marine mammals, different lineages of toothed whales (Odontoceti) have repeatedly invaded freshwater ecosystems during the Cenozoic era. The so-called ‘river dolphins’ are now recognized as independent lineages that converged on similar morphological specializations (e.g., longirostry). In South America, the two endemic ‘river dolphin’ lineages form a clade (Inioidea), with closely related fossil inioids from marine rock units in the South Pacific and North Atlantic oceans. Here we describe a new genus and species of fossil inioid, Isthminia panamensis, gen. et sp. nov. from the late Miocene of Panama. The type and only known specimen consists of a partial skull, mandibles, isolated teeth, a right scapula, and carpal elements recovered from Submitted 27 April 2015 the Pina˜ Facies of the Chagres Formation, along the Caribbean coast of Panama.
  • Download Full Article in PDF Format

    Download Full Article in PDF Format

    A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans Robert W. BOESSENECKER Department of Geology, University of Otago, 360 Leith Walk, P.O. Box 56, Dunedin, 9054 (New Zealand) and Department of Earth Sciences, Montana State University 200 Traphagen Hall, Bozeman, MT, 59715 (USA) and University of California Museum of Paleontology 1101 Valley Life Sciences Building, Berkeley, CA, 94720 (USA) [email protected] Boessenecker R. W. 2013. — A new marine vertebrate assemblage from the Late Neogene Purisima Formation in Central California, part II: Pinnipeds and Cetaceans. Geodiversitas 35 (4): 815-940. http://dx.doi.org/g2013n4a5 ABSTRACT e newly discovered Upper Miocene to Upper Pliocene San Gregorio assem- blage of the Purisima Formation in Central California has yielded a diverse collection of 34 marine vertebrate taxa, including eight sharks, two bony fish, three marine birds (described in a previous study), and 21 marine mammals. Pinnipeds include the walrus Dusignathus sp., cf. D. seftoni, the fur seal Cal- lorhinus sp., cf. C. gilmorei, and indeterminate otariid bones. Baleen whales include dwarf mysticetes (Herpetocetus bramblei Whitmore & Barnes, 2008, Herpetocetus sp.), two right whales (cf. Eubalaena sp. 1, cf. Eubalaena sp. 2), at least three balaenopterids (“Balaenoptera” cortesi “var.” portisi Sacco, 1890, cf. Balaenoptera, Balaenopteridae gen. et sp. indet.) and a new species of rorqual (Balaenoptera bertae n. sp.) that exhibits a number of derived features that place it within the genus Balaenoptera. is new species of Balaenoptera is relatively small (estimated 61 cm bizygomatic width) and exhibits a comparatively nar- row vertex, an obliquely (but precipitously) sloping frontal adjacent to vertex, anteriorly directed and short zygomatic processes, and squamosal creases.
  • Sturzstroms) Generated by Rockfalls

    Sturzstroms) Generated by Rockfalls

    Catastrophic Debris Streams (Sturzstroms) Generated by Rockfalls KENNETH J. HSU Geological Institute, Swiss Federal Institute of Technology, Zurich, Switzerland ABSTRACT sturzstrom. Key words: sturzstrom, debris I was fascinated by Heim's accounts and streams, rockfalls, landslides. chose the topic "Sturzstrom" as a theme of Large rockfalls commonly generate my inaugural speech in 1967 after my ap- fast-moving streams of debris that have INTRODUCTION pointment to Zurich. A theoretical analysis been called "sturzstroms." The geometry of and some preliminary experiments pro- sturzstrom deposits is similar to that of Large masses of rocks crashing down a duced evidence in support of Heim's claim mudflows, lava flows, and glaciers. steep slope commonly generate a stream of that the broken debris of large masses of Sturzstroms can move along a flat course broken debris, which often moves at fantas- rock flowed, but exchanges of written for unexpectedly large distances and may tic speeds over very gentle slopes for unex- communications failed to dissuade my surge upward by the power of their pectedly long distances. The famous Elm friend Ron Shreve from his conviction. momentum. A currently popular hypothesis rockfall of Switzerland, 1881, produced Furthermore, the necessary experimenta- to account for their excessive distance of such a debris stream; it buried a village and tion to deliver a decisive argument was transport suggests that sturzstroms slide on killed 115 persons. Albert Heim (in Buss never carried out, as my interests drifted air cushions. Contrary to that hypothesis, and Heim, 1881, p. 143) stated shortly elsewhere. Eventually the old manuscript evidence is herein presented to support after the catastrophe that he had never was taken out and dusted off when I Heim's contention that sturzstroms indeed known of such an example.
  • Impacts of Laurel Wilt Disease on Native Persea of the Southeastern United States Timothy M

    Impacts of Laurel Wilt Disease on Native Persea of the Southeastern United States Timothy M

    Clemson University TigerPrints All Dissertations Dissertations 5-2016 Impacts of Laurel Wilt Disease on Native Persea of the Southeastern United States Timothy M. Shearman Clemson University, [email protected] Follow this and additional works at: https://tigerprints.clemson.edu/all_dissertations Recommended Citation Shearman, Timothy M., "Impacts of Laurel Wilt Disease on Native Persea of the Southeastern United States" (2016). All Dissertations. 1656. https://tigerprints.clemson.edu/all_dissertations/1656 This Dissertation is brought to you for free and open access by the Dissertations at TigerPrints. It has been accepted for inclusion in All Dissertations by an authorized administrator of TigerPrints. For more information, please contact [email protected]. IMPACTS OF LAUREL WILT DISEASE ON NATIVE PERSEA OF THE SOUTHEASTERN UNITED STATES A Dissertation Presented to the Graduate School of Clemson University In Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy Forest Resources by Timothy M. Shearman May 2016 Accepted by: Dr. G. Geoff Wang, Committee Chair Dr. Saara J. DeWalt Dr. Donald L. Hagan Dr. Julia L. Kerrigan Dr. William C. Bridges ABSTRACT Laurel Wilt Disease (LWD) has caused severe mortality in native Persea species of the southeastern United States since it was first detected in 2003. This study was designed to document the range-wide population impacts to LWD, as well as the patterns of mortality and regeneration in Persea ecosystems. I used Forest Inventory and Analysis (FIA) data from the U.S. Forest Service to estimate Persea borbonia (red bay) populations from 2003 to 2011 to see if any decline could be observed since the introduction of LWD causal agents.
  • Persea Species Restoration in Laurel Wilt Epidemic Areas

    Persea Species Restoration in Laurel Wilt Epidemic Areas

    Persea Species Restoration in Laurel Wilt Epidemic Areas Photo: Chip Bates Photo: LeRoy Rodgers Melbourne, Florida Ambrosia beetles are typically harmless But, some are causing mass tree mortality Xyleborus glabratus – redbay ambrosia beetle Clonal symbiosis! Raffaelea lauricola - Ophiostomatales Lauraceae are dominant canopy species throughout the tropics • Over 3000 species so taxonomy is poorly understood • Important essential oils: repel insects, perfumes, spices, fragrant wood and www.mobot.org medicine • Agriculturally important: avocado and spices Non-native Lauraceae susceptibility to Raffaelea lauricola Cinnamomum pedunculatum (Japanese cinnamon) Lindera megaphylla 30 days PI (Asia) wilt some, then stop 20 days PI overall tolerant but not resistant Persea podadenia (Mexico) overall susceptible 30 days PI ~35 more species to test Known hosts in the USA Persea borbonia - Redbay Persea palustris – Swamp bay Persea humilis - Silkbay Persea americana - Avocado *Persea indica Cinnamomum camphora – Camphor tree AGprofessional.com Sassafras albidum - Sassafras *Umbellularia californica – California bay laurel Laurus nobilis – European bay laurel *Lindera benzoin - Northern spicebush en.wikipedia.org/ aLindera melissifolia - Pondberry wiki/Sassafras aLitsea aestivalis - Pondspice *Licaria triandra - Gulf licaria *Ocotea coriacea - Lancewood *Persea mexicana – Mexican redbay *artificial fungal inoculation a threatened or endangered Palamedes swallowtail (Papilio palamedes) Laurel Wilt Disease-Widespread and High Mortality Percent redbay
  • Persea Borbonia Redbay1 Edward F

    Persea Borbonia Redbay1 Edward F

    Fact Sheet ST-436 October 1994 Persea borbonia Redbay1 Edward F. Gilman and Dennis G. Watson2 INTRODUCTION This handsome North American native evergreen tree can reach 50 feet in height with a comparable spread but is often seen somewhat shorter and wider, particularly when grown in the open in an urban area (Fig. 1). The glossy, leathery, medium green, six-inch leaves emit a spicy fragrance when crushed and the inconspicuous, springtime flower clusters are followed by small, dark blue fruits which ripen in fall. These fruits are enjoyed by birds and squirrels and add to the tree’s overall attractiveness. The trunk bears very showy, ridged, red-brown bark and frequently branches low to the ground forming a multi-stemmed habit Figure 1. Mature Redbay. similar to live oak, but it can be pruned to make a single, short central leader which would be most suitable for many urban plantings. DESCRIPTION GENERAL INFORMATION Height: 30 to 50 feet Spread: 30 to 50 feet Scientific name: Persea borbonia Crown uniformity: symmetrical canopy with a Pronunciation: PER-see-uh bor-BOE-nee-uh regular (or smooth) outline, and individuals have more Common name(s): Redbay or less identical crown forms Family: Lauraceae Crown shape: round; spreading USDA hardiness zones: 7B through 11 (Fig. 2) Crown density: dense Origin: native to North America Growth rate: medium Uses: wide tree lawns (>6 feet wide); recommended Texture: medium for buffer strips around parking lots or for median strip plantings in the highway; near a deck or patio; Foliage reclamation plant; shade tree; specimen; residential street tree; no proven urban tolerance Leaf arrangement: alternate (Fig.
  • Evolution of River Dolphins Healy Hamilton1*, Susana Caballero2, Allen G

    Evolution of River Dolphins Healy Hamilton1*, Susana Caballero2, Allen G

    doi 10.1098/rspb.2000.1385 Evolution of river dolphins Healy Hamilton1*, Susana Caballero2, Allen G. Collins1 and Robert L. Brownell Jr3 1Museum of Paleontology and Department of Integrative Biology, University of California, Berkeley, CA 94720, USA 2Fundacio¨ nYubarta, Carrara 24F oeste, no 3-110, Cali, Colombia 3Southwest Fisheries Science Center, PO Box 271, LaJolla, CA 92038, USA The world’s river dolphins (Inia, Pontoporia, Lipotes and Platanista) are among the least known and most endangered of all cetaceans. The four extant genera inhabit geographically disjunct river systems and exhibit highly modi¢ed morphologies, leading many cetologists to regard river dolphins as an unnatural group. Numerous arrangements have been proposed for their phylogenetic relationships to one another and to other odontocete cetaceans. These alternative views strongly a¡ect the biogeographical and evolu- tionary implications raised by the important, although limited, fossil record of river dolphins. We present a hypothesis of river dolphin relationships based on phylogenetic analysis of three mitochondrial genes for 29 cetacean species, concluding that the four genera represent three separate, ancient branches in odonto- cete evolution. Our molecular phylogeny corresponds well with the ¢rst fossil appearances of the primary lineages of modern odontocetes. Integrating relevant events in Tertiary palaeoceanography, we develop a scenario for river dolphin evolution during the globally high sea levels of the Middle Miocene. We suggest that ancestors of the four extant river dolphin lineages colonized the shallow epicontinental seas that inun- dated the Amazon, Parana¨ , Yangtze and Indo-Gangetic river basins, subsequently remaining in these extensive waterways during their transition to freshwater with the Late Neogene trend of sea-level lowering.
  • Characterization and Analysis of a Large Rockfall Along the Rio Chama, Archuleta County, Colorado

    Characterization and Analysis of a Large Rockfall Along the Rio Chama, Archuleta County, Colorado

    CHARACTERIZATION AND ANALYSIS OF A LARGE ROCKFALL ALONG THE RIO CHAMA, ARCHULETA COUNTY, COLORADO by Robert L. Duran A thesis submitted to the Faculty and the Board of Trustees of the Colorado School of Mines in partial fulfillment of the requirements for the degree of Masters of Science (Geological Engineering). Golden, Colorado Date_______ Signed_______________________ Robert L Duran Signed_______________________ Dr. Wendy Zhou Thesis Advisor Signed_______________________ Dr. Paul Santi Thesis Advisor Golden, Colorado Date_______ Signed_______________________ Dr. M Stephen Enders Professor and Interim Head Department of Geology and Geological Engineering ! ii! TABLE OF CONTENTS ABSTRACT ....................................................................................................................... vi LIST OF FIGURES .......................................................................................................... vii LIST OF TABLES .............................................................................................................. x ACKNOWLEDGMENTS ................................................................................................. xi CHAPTER 1: INTRODUCTION ....................................................................................... 1 1.1 Background ............................................................................................................... 3 1.2 Geologic Setting .......................................................................................................
  • Southern Exposures

    Southern Exposures

    Searching for the Pliocene: Southern Exposures Robert E. Reynolds, editor California State University Desert Studies Center The 2012 Desert Research Symposium April 2012 Table of contents Searching for the Pliocene: Field trip guide to the southern exposures Field trip day 1 ���������������������������������������������������������������������������������������������������������������������������������������������� 5 Robert E. Reynolds, editor Field trip day 2 �������������������������������������������������������������������������������������������������������������������������������������������� 19 George T. Jefferson, David Lynch, L. K. Murray, and R. E. Reynolds Basin thickness variations at the junction of the Eastern California Shear Zone and the San Bernardino Mountains, California: how thick could the Pliocene section be? ��������������������������������������������������������������� 31 Victoria Langenheim, Tammy L. Surko, Phillip A. Armstrong, Jonathan C. Matti The morphology and anatomy of a Miocene long-runout landslide, Old Dad Mountain, California: implications for rock avalanche mechanics �������������������������������������������������������������������������������������������������� 38 Kim M. Bishop The discovery of the California Blue Mine ��������������������������������������������������������������������������������������������������� 44 Rick Kennedy Geomorphic evolution of the Morongo Valley, California ���������������������������������������������������������������������������� 45 Frank Jordan, Jr. New records
  • <I>Alseodaphnopsis</I> (<I>Lauraceae</I>)

    <I>Alseodaphnopsis</I> (<I>Lauraceae</I>)

    Blumea 64, 2019: 186–189 www.ingentaconnect.com/content/nhn/blumea RESEARCH ARTICLE https://doi.org/10.3767/blumea.2019.64.02.10 Alseodaphnopsis (Lauraceae) revisited H. van der Werff1 Key words Abstract Generic delimitations among the Asian members of the Persea group, including the recently described genus Alseodaphnopsis, are discussed. These genera, with the exception of Alseodaphnopsis, are characterized by Alseodaphne reproductive characters. A study of flowers of Alseodaphnopsis species found that Alseodaphnopsis species have Alseodaphnopsis unisexual flowers and that Alseodaphnopsis is better defined by its unisexual flowers than by vegetative characters. Lauraceae This is the first report of the presence of unisexual flowers in any member of the Persea group. Persea group unisexual flowers Published on 17 September 2019 ASIAN GENERA OF THE PERSEA GROUP One of the three main groups of genera in tropical Asian is the Persea group, characterized by the inflorescence type described The classification of the Lauraceae has long been problematic. above. This group consists of the following genera in tropical During the 19th century several classifications were proposed Asia: Alseodaphne Nees, Cinnamomum Schaeff. Dehaasia (Nees 1836, Meissner 1864, Bentham 1880, Mez 1889), all Blume, Machilus Nees, Nothaphoebe Blume and Phoebe Nees. based on characters of flowers, fruits and inflorescences. Dur- The Persea group also includes the neotropical Persea Mill. ing the 20th century Kostermans (1957) added a new scheme, and Apollonias Nees with one species in the Canary Islands. this one largely based on the position of the ovary. Only dur- Cinnamomum can be divided into two groups, one with op- ing the last 40 years have other characters been used in the posite, tripliveined leaves and one with alternate, pinnately to classification.
  • Persea Borbonia) Population Structure and Forest Communities in the Coastal Plain of Georgia, USA

    Persea Borbonia) Population Structure and Forest Communities in the Coastal Plain of Georgia, USA

    Georgia Southern University Digital Commons@Georgia Southern Electronic Theses and Dissertations Graduate Studies, Jack N. Averitt College of Summer 2010 Impacts of Laurel Wilt Disease on Redbay (Persea Borbonia) Population Structure and Forest Communities in the Coastal Plain of Georgia, USA Kimberly S. Spiegel Follow this and additional works at: https://digitalcommons.georgiasouthern.edu/etd Recommended Citation Spiegel, Kimberly S., "Impacts of Laurel Wilt Disease on Redbay (Persea Borbonia) Population Structure and Forest Communities in the Coastal Plain of Georgia, USA" (2010). Electronic Theses and Dissertations. 746. https://digitalcommons.georgiasouthern.edu/etd/746 This thesis (open access) is brought to you for free and open access by the Graduate Studies, Jack N. Averitt College of at Digital Commons@Georgia Southern. It has been accepted for inclusion in Electronic Theses and Dissertations by an authorized administrator of Digital Commons@Georgia Southern. For more information, please contact [email protected]. IMPACTS OF LAUREL WILT DISEASE ON REDBAY (PERSEA BORBONIA) POPULATION STRUCTURE AND FOREST COMMUNITIES IN THE COASTAL PLAIN OF GEORGIA, USA by KIMBERLY S. SPIEGEL (Under the direction of Lissa M. Leege) ABSTRACT Laurel wilt disease (LWD), a fungal disease vectored by the non-native redbay ambrosia beetle (Xyleborus glabratus), has caused mortality of redbay (Persea borbonia) in the Coastal Plain of Georgia, USA, since 2003. This disease has spread 30-100 km/year and little research has evaluated its impacts on redbay population structure and forest communities. Healthy and infested populations of redbay and their associated communities were compared in five sites infested with LWD and three un-infested sites in five counties in Georgia.
  • Debris Avalanche Deposits Associated with Large Igneous Province Volcanism: an Example from the Mawson Formation, Central Allan Hills, Antarctica

    Debris Avalanche Deposits Associated with Large Igneous Province Volcanism: an Example from the Mawson Formation, Central Allan Hills, Antarctica

    The following document is a pre-print version of: Reubi, O., Ross, P.-S. et White, J.D.L. (2005) Debris avalanche deposits associated with Large Igneous province volcanism: an example from the Mawson Formation, Central Allan Hills, Antarctica. Geological Society of America Bulletin 117: 1615–1628 Debris avalanche deposits associated with large igneous province volcanism: an example from the Mawson Formation, central Allan Hills, Antarctica O. Reubi 1,2,3 , P-S. Ross 1,2,4 and J.D L. White 1 1. Department of Geology, University of Otago, PO Box 56, Dunedin, New Zealand. 2. These authors contributed equally to this work. 3. Now at : Institut de Minéralogie et Pétrographie, Section des Sciences de la Terre, Université de Lausanne, BFSH-2, CH-1015 Lausanne, Switzerland. 4. Corresponding author. ABSTRACT An up to 180 m-thick debris avalanche deposit related to Ferrar large igneous province magmatism is observed at central Allan Hills, Antarctica. This Jurassic debris avalanche deposit forms the lower part (member m 1) of the Mawson Formation and is overlain by thick volcaniclastic layers containing a mixture of basaltic and sedimentary debris (member m 2). The m 1 deposit consists of a chaotic assemblage of breccia panels and megablocks up to 80 m across. In contrast to m 2, it is composed essentially of sedimentary material derived from the underlying Beacon Supergroup. The observed structures and textures suggest that the breccias in m 1 were mostly produced by progressive fragmentation of megablocks during transport but also to a lesser extent by disruption and ingestion of the substrate by the moving debris avalanche.