Apr 2018 NCGS Newsletter

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Apr 2018 NCGS Newsletter NORTHERN CALIFORNIA GEOLOGICAL SOCIETY Website: www.ncgeolsoc.org MEETING ANNOUNCEMENT NCGS OFFICERS President: Greg Bartow, California State Parks DATE: April 25, 2018 gregbartow @ yahoo.com LOCATION: Orinda Masonic Center, 9 Altarinda Rd., Orinda President-Elect: (see map on back page) Open TIME: 6:30 – 7:00 p.m.: Social; 7:00 p.m.: Presentation Past President: Will Schweller SPEAKER: Dr. Andrew Gunther willschweller @ yahoo.com Field Trip Coordinator: Environmental Science, Policy, and Will Schweller willschweller @ yahoo.com Communication Treasurer: Barbara Matz, APTIM TOPIC: “Talking Climate Change” barbara.matz @ aptim.com Program Director: Dr. Andrew Gunther will review the basic physical principles and John Karachewski, Department of observations that have led every scientific academy in the world to Toxic Substances Control conclude that human emissions of greenhouse gasses are altering the cageo @ sbcglobal.net climate. He will discuss what the expected significant climatic Scholarship Chair: changes mean for the country in general and the Bay Area in Phil Garbutt, Retired plgarbutt @ comcast.net particular. More information about Dr. Gunther is available at www.andrewgunther.com. K-12 Program Chair: Open Biography: Dr. Gunther received his Ph.D. in Energy and Resources Membership Chair: from the University of California at Berkeley in 1987, and he has Tom Barry, tomasbarry @ aol.com worked at the intersection of environmental science and policy since NCGS Outreach Chair: 1979. He has published research in the field of ecotoxicology, and he Mark Petrofsky, Retired has extensive experience in applying science to the development of mpetrof @ hotmail.com air, water, and endangered species policy. NCGS Newsletter Editor: Mark Sorensen, Gilbane Federal He served as Assistant Chief Scientist for the Exxon Valdez Oil Spill msorensen64 @ earthlink.net Restoration Program, and he was the first manager of the State of NCGS Website Editor: California’s program that monitors for toxic substances in the San Jonathan Partsch, GIS at Sanborn Francisco Estuary ecosystem. Map Co., jon.partsch @ gmail.com Recording Secretary & Social Media: He just completed six years as the Executive Coordinator of the Bay Crystal Replogle, Belcan Area Ecosystems Climate Change Consortium, and he is working ctreplogle @ gmail.com with a broad array of organizations to help prepare our region for a COUNSELORS changing climate. Don Lewis, Retired He is a member of the Board of Directors of the Union of Concerned donlewis @ comcast.net Scientists, and a scientific advisor to the Alliance for Climate Ray Sullivan, Emeritus Professor, Education and Interfaith Power & Light. San Francisco State University rays.rock @ gmail.com Noelle Schoellkopf, Schlumberger nschoellkopf @ slb.com Phil Reed, Retired philecreed @ yahoo.com 1 NCGS 2017 – 2018 Calendar NCGS is looking for manuscript reviewers for the Mount Diablo Anniversary Volume planned for th May 30, 2018 Dinner Meeting 6:00 pm publication next year in commemoration of the 75 (see flyer for registration; please register by May 25) anniversary of the society, and also donations to Dr. Isabel Montanez, UC Davis and President – help cover the cost of the volume. Geological Society of America Reconstructing precipitation patterns in California UC Berkeley Earth & Planetary during past warmings and coolings of the last 20,000 years Science Weekly Seminar Series Interesting seminars are presented at 141 McCone Hall June 27, 2018 7:00 pm (usually) on Thursdays at 4 pm for most of the academic Dr. Janet Watt, USGS Research Geophysicist year, from late August through early May. Underwater Secrets of the Hayward Fault Zone: For an updated list of seminars, go to Integrated 3D imaging to understand earthquake http://eps.berkeley.edu/events/seminars. hazards Bay Area Geophysical Society NCGS Silent Auction The next meeting of this society will be held on We will hold a brief “silent auction” during the social Monday, April 30 at 2 to 3 pm at McCone Hall 265 on hour at our May dinner meeting. Please send the the UC Berkeley campus. SEG 2018 Distinguished description of any auction items to Paul Henshaw Lecturer Bill Symes will speak on Advanced Imaging ([email protected]), and copy Crystal for Practitioners. For details see: Replogle ([email protected]) and Barb Matz http://bayareageophysicalsociety.org/index.php/event/ ([email protected]) ahead of time seg-2018-distinguished-lecturer-bill-symes/ for approval and to obtain a bid sheet. Hey, everyone! In case you haven’t The rules of the silent auction will be sent in a renewed your membership: It’s Still separate email from Crystal. Thanks for your Renewal Time! If you haven’t already renewed, participation! please use the Renewal Form on page 13 of the March newsletter. Either mail it in, or hand it to the Treasurer at meeting registration. NCGS Field Trips Several potential field trips are being considered for NCGS members are invited our next Board of 2018. A survey to the NCGS membership will Directors meeting at the APTIM (formerly CB&I / determine which of these trips have the most interest. Shaw E&I) offices at 4005 Port Chicago Hwy, • Ring Mountain (Marin Co.) exotic lithologies Concord, CA 94520. The next board meeting will be and exotic plants (Saturday, May 19; see email held at this address at 8:30 am on Sat., May 5, 2018, from Crystal) and is open to all NCGS members. Please contact • Devil's Slide (repeat of November 2017 trip) in Greg Bartow if you would like to attend, at gregbartow@yahoo,com. May or later • New Almaden (San Jose area) inactive mercury mines (late Spring) NCGS Outreach Events • Point Richmond Franciscan Complex (Fall) NCGS Outreach at Castro Valley Mineral and We are always looking for new field trip Gem Show, Fremont Pavilion, Fremont, CA opportunities. If you go on or hear about an Saturday and Sunday March 3-4, 2018 interesting field trip, please let Will Schweller ([email protected]) know about it so that we Tables were set up for us outside of Pavilion Hall No. can evaluate it for a future NCGS trip. 4. NCGS members present on one or both days were: Greg Bartow, Andrew Church, Greg and Rosita Croft, Phil Garbutt, Ed Hamilton, Bill Motzer, and Mark Petrofsky. Although public participation was low because of the cold and rainy weather, most were interested in the rocks and NCGS. 2 A very nice specimen of fossilized clam shells was Storlazzi, USGS Research Geologist, will present donated to the NCGS by Eugene and Sharon Cisneros a lecture titled The Role of U.S. Coral Reefs in of the Mineralogical Research Company, San Jose, Coastal Protection: Rigorously valuing flood California. reduction benefits to inform coastal zone We can still use a laptop , as well as nice management decisions. For more information on specimens of the lectures, and for a map of the location, go to: from the Greater Bay Area; of interest https://online.wr.usgs.gov/calendar/. can be used for classroom activities (ones that can spark questions, tell stories). The early bird got to fly: Archaeopteryx was an active flyer Bay Area Science ScienceDaily, March 13, 2018 (http://www.bayareascience.org) This website provides a free weekly emailed newsletter of an extensive listing of local science- based activities (evening lectures, classes, field trips, hikes, etc. – usually several per week). Hayward Fault - 150th Anniversary of Great Quake (1868) The 150th Anniversary of the Great Hayward Fault Earthquake in 1868 will be on Oct 21, 2018. Numerous events and tours are planned and listed at https://msnucleus.org/haywardfault/150_hayward.html. If you have any questions please contact Joyce at [email protected]<mailto:blueford@msnucleu The Munich specimen of the transitional bird s.org> or call (510) 790-6284. Archaeopteryx. It preserves a partial skull (top left), shoulder girdle and both wings slightly raised up (most Association of Environmental & left to center left), the ribcage (center), and the pelvic Engineering Geologists, girdle and both legs in a 'cycling' posture (right); all connected by the vertebral column from the neck (top San Francisco Bay Area Chapter left, under the skull) to the tip of the tail (most right). Meeting locations rotate between San Francisco, the Imprints of its wing feathers are visible radiating from East Bay, and the South Bay. Please check the below the shoulder and vague imprints of the tail website for current details. For information on plumage can be recognized extending from the tip of the monthly meetings as well as this year’s tail. Credit: ESRF/Pascal Goetgheluck international congress, go to: The question of whether the Late Jurassic dino-bird http://www.aegweb.org/group/SF. Archaeopteryx was an elaborately feathered ground Join them for the 61st AEG Annual Meeting/13th dweller, a glider, or an active flyer has fascinated IAEG Congress in San Francisco, California on palaeontologists for decades. Valuable new September 15-23, 2018. information obtained with state-of-the-art synchrotron microtomography at the ESRF, the European USGS Evening Public Lecture Series Synchrotron (Grenoble, France), allowed an international team of scientists to answer this question The USGS evening public lecture series events are in Nature Communications. The wing bones of free and are intended for a general public audience Archaeopteryx were shaped for incidental active that may not be familiar with the science being flight, but not for the advanced style of flying discussed. Monthly lectures are usually scheduled mastered by today's birds. for the last Thursday of the month throughout the Was Archaeopteryx capable of flying, and if so, how? year, or often the previous Thursday to Although it is common knowledge that modern-day accommodate speakers. On April 26 at 7 pm, Curt birds descended from extinct dinosaurs, many 3 questions on their early evolution and the demonstrated that the bones of Archaeopteryx plot development of avian flight remain unanswered.
Recommended publications
  • A Phylogenetic Analysis of the Basal Ornithischia (Reptilia, Dinosauria)
    A PHYLOGENETIC ANALYSIS OF THE BASAL ORNITHISCHIA (REPTILIA, DINOSAURIA) Marc Richard Spencer A Thesis Submitted to the Graduate College of Bowling Green State University in partial fulfillment of the requirements of the degree of MASTER OF SCIENCE December 2007 Committee: Margaret M. Yacobucci, Advisor Don C. Steinker Daniel M. Pavuk © 2007 Marc Richard Spencer All Rights Reserved iii ABSTRACT Margaret M. Yacobucci, Advisor The placement of Lesothosaurus diagnosticus and the Heterodontosauridae within the Ornithischia has been problematic. Historically, Lesothosaurus has been regarded as a basal ornithischian dinosaur, the sister taxon to the Genasauria. Recent phylogenetic analyses, however, have placed Lesothosaurus as a more derived ornithischian within the Genasauria. The Fabrosauridae, of which Lesothosaurus was considered a member, has never been phylogenetically corroborated and has been considered a paraphyletic assemblage. Prior to recent phylogenetic analyses, the problematic Heterodontosauridae was placed within the Ornithopoda as the sister taxon to the Euornithopoda. The heterodontosaurids have also been considered as the basal member of the Cerapoda (Ornithopoda + Marginocephalia), the sister taxon to the Marginocephalia, and as the sister taxon to the Genasauria. To reevaluate the placement of these taxa, along with other basal ornithischians and more derived subclades, a phylogenetic analysis of 19 taxonomic units, including two outgroup taxa, was performed. Analysis of 97 characters and their associated character states culled, modified, and/or rescored from published literature based on published descriptions, produced four most parsimonious trees. Consistency and retention indices were calculated and a bootstrap analysis was performed to determine the relative support for the resultant phylogeny. The Ornithischia was recovered with Pisanosaurus as its basalmost member.
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    Editors' choice The sauropodomorph biostratigraphy of the Elliot Formation of southern Africa: Tracking the evolution of Sauropodomorpha across the Triassic–Jurassic boundary BLAIR W. MCPHEE, EMESE M. BORDY, LARA SCISCIO, and JONAH N. CHOINIERE McPhee, B.W., Bordy, E.M., Sciscio, L., and Choiniere, J.N. 2017. The sauropodomorph biostratigraphy of the Elliot Formation of southern Africa: Tracking the evolution of Sauropodomorpha across the Triassic–Jurassic boundary. Acta Palaeontologica Polonica 62 (3): 441–465. The latest Triassic is notable for coinciding with the dramatic decline of many previously dominant groups, followed by the rapid radiation of Dinosauria in the Early Jurassic. Among the most common terrestrial vertebrates from this time, sauropodomorph dinosaurs provide an important insight into the changing dynamics of the biota across the Triassic–Jurassic boundary. The Elliot Formation of South Africa and Lesotho preserves the richest assemblage of sauropodomorphs known from this age, and is a key index assemblage for biostratigraphic correlations with other simi- larly-aged global terrestrial deposits. Past assessments of Elliot Formation biostratigraphy were hampered by an overly simplistic biozonation scheme which divided it into a lower “Euskelosaurus” Range Zone and an upper Massospondylus Range Zone. Here we revise the zonation of the Elliot Formation by: (i) synthesizing the last three decades’ worth of fossil discoveries, taxonomic revision, and lithostratigraphic investigation; and (ii) systematically reappraising the strati- graphic provenance of important fossil locations. We then use our revised stratigraphic information in conjunction with phylogenetic character data to assess morphological disparity between Late Triassic and Early Jurassic sauropodomorph taxa. Our results demonstrate that the Early Jurassic upper Elliot Formation is considerably more taxonomically and morphologically diverse than previously thought.
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  • Massospondylus Carinatus Owen 1854 (Dinosauria: Sauropodomorpha) from the Lower Jurassic of South Africa: Proposed Conservation of Usage by Designation of a Neotype
    Massospondylus carinatus Owen 1854 (Dinosauria: Sauropodomorpha) from the Lower Jurassic of South Africa: Proposed conservation of usage by designation of a neotype Adam M. Yates1* & Paul M. Barrett2 1Bernard Price Institute for Palaeontological Research, University of the Witwatersrand, Private Bag 3, WITS, 2050 Johannesburg, South Africa 2Department of Palaeontology, The Natural History Museum, Cromwell Road, London, SW7 5BD, U.K. Received 17 February 2010. Accepted 12 November 2010 The purpose of this article is to preserve the usage of the binomen Massospondylus carinatus by designating a neotype specimen. Massospondylus is the most abundant basal sauropodomorph dinosaur from the Early Jurassic strata of southern Africa. This taxon forms the basis for an extensive palaeobiological literature and is the eponym of Massospondylidae and the nominal taxon of a biostratigraphical unit in current usage, the ‘Massospondylus Range Zone’. The syntype series of M. carinatus (five disarticulated and broken vertebrae) was destroyed during World War II, but plaster casts and illustrations of the material survive. Nonetheless, these materials cannot act as type material for this taxon under the rules of the ICZN Code. In order to avoid nomenclatural instability, we hereby designate BP/1/4934 (a skull and largely complete postcranial skeleton) as the neotype of Massospondylus carinatus. Keywords: Dinosauria, Sauropodomorpha, Massospondylidae, Massospondylus, Massospondylus carinatus, neotype, South Africa, upper Elliot Formation, Early Jurassic. INTRODUCTION same taxon, possibly even the same individual, as at least Richard Owen described and named Massospondylus some of the syntype series of Massospondylus carinatus. carinatus (1854, p. 97) with carinatus as the type species of Their initial separation from Massospondylus carinatus the genus by monotypy.
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    Palaeon!. afr., 33,41-54 (1997) THE ROLE OF FOSSILS IN INTERPRETING THE DEVELOPMENT OF THE KAROO BASIN by P. J. Hancox· & B. S. Rubidge2 IGeology Department, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa 2Bernard Price Institute for Palaeontological Research, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa ABSTRACT The Permo-Carboniferous to Jurassic aged rocks oft1:J.e main Karoo Basin ofSouth Africa are world renowned for the wealth of synapsid reptile and early dinosaur fossils, which have allowed a ten-fold biostratigraphic subdivision ofthe Karoo Supergroup to be erected. The role offossils in interpreting the development of the Karoo Basin is not, however, restricted to biostratigraphic studies. Recent integrated sedimentological and palaeontological studies have helped in more precisely defming a number of problematical formational contacts within the Karoo Supergroup, as well as enhancing palaeoenvironmental reconstructions, and basin development models. KEYWORDS: Karoo Basin, Biostratigraphy, Palaeoenvironment, Basin Development. INTRODUCTION Invertebrate remains are important as indicators of The main Karoo Basin of South Africa preserves a facies genesis, including water temperature and salinity, retro-arc foreland basin fill (Cole 1992) deposited in as age indicators, and for their biostratigraphic potential. front of the actively rising Cape Fold Belt (CFB) in Fossil fish are relatively rare in the Karoo Supergroup, southwestern Gondwana. It is the deepest and but where present are useful indicators of gross stratigraphically most complete of several depositories palaeoenvironments (e.g. Keyser 1966) and also have of Permo-Carboniferous to Jurassic age in southern biostratigraphic potential (Jubb 1973; Bender et al. Africa and reflects changing depositional environments 1991).
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  • Palaeontological Heritage of the Free State
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  • Triassic Pentadactyl Tracks from the Los Menucos Group
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  • A Second Specimen of Blikanasaurus (Dinosauria: Sauropoda) and the Biostratigraphy of the Lower Elliot Formation
    A second specimen of Blikanasaurus (Dinosauria: Sauropoda) and the biostratigraphy of the lower Elliot Formation Adam M. Yates Bernard Price Institute for Palaeontological Research, School of Geosciences, University of the Witwatersrand, Private Bag 3, WITS, 2050 South Africa E-mail: [email protected] Received 25 September 2007. Accepted 29 January 2008 A second specimen of the rare basal sauropod Blikanasaurus cromptoni, is recorded from a site in the Ladybrand district of the Eastern Free State, South Africa. The specimen consists of a right metatarsal 1 that originated from the upper 20 m of the lower Elliot Formation. It can be referred to B. cromptoni on the basis of its small size and highly robust proportions, which distinguish this taxon from all other sauropodomorphs. This record extends the geographic distribution of B. cromptoni north into the region of the main Karoo Basin where the Elliot Formation is dramatically thinner. It also extends the known stratigraphic range of B. cromptoni up from the base of the Elliot Formation into a position near the top of the lower member. This new record, combined with other new discoveries, supports the hypothesis that the thin northern part of the lower Elliot Formation is a condensed section that is largely, if not entirely, coeval with the thicker southern sections. Keywords: basal sauropod, Blikanasaurus, Triassic, biostratigraphy, Karoo Basin, Elliot Formation. INTRODUCTION below and the typical Red Beds [= Elliot Formation] The dinosaur-rich Elliot Formation was deposited above’ (Charig et al. 1965, p. 200). This echoed the thought during the latest stages of filling of the main Karoo Basin, a of several geologists claimed that the Molteno-Elliot large foreland basin to the north of the Cape Fold Belt in contact was conformable and gradational (Du Toit 1939; southern Africa.
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  • Carnivorous Dinocephalian from the Middle Permian of Brazil and Tetrapod Dispersal in Pangaea
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  • Petrography, Modal Composition and Tectonic Provenance of Some
    Open Geosci. 2018; 10:821–833 Research Article Open Access Priscilla Chima*, Christopher Baiyegunhi, Kuiwu Liu, and Oswald Gwavava Petrography, modal composition and tectonic provenance of some selected sandstones from the Molteno, Elliot and Clarens Formations, Karoo Supergroup, in the Eastern Cape Province, South Africa https://doi.org/10.1515/geo-2018-0064 1 Introduction Received November 16, 2017; accepted March 16, 2018 Abstract: The Late Triassic - Early Jurassic non marine clas- Sedimentary rocks, particularly sandstones, are com- tic sediments of the Molteno, Elliot and Clarens Forma- monly used to construe provenance and to identify an- tions were studied to deduce their mineralogy and tectonic cient tectonic settings since clastic detrital components provenance. The study is based on road-cut exposures preserve detailed information on the provenance, sedi- of the formations in the Eastern Cape Province of South ments transportion and the interaction of physical and Africa. Petrographic studies based on quantitative analy- chemical processes [1, 2]. Petrography of sandstones reveal sis of the detrital minerals shows that the clastic sediments more on the provenance of the detritus despite the fact that (mostly sandstones) are predominantly made up of quartz, their original compositions are influenced by processes feldspars, and metamorphic and igneous rock fragments. such as weathering, transportation and diagenesis [3]. [4] Among the main detrital framework grains, quartz con- documented that other factors like source area charac- stitutes about 62-91%, feldspar 6-24% and 3-19% of lithic teristics, orogenesis, multicycling, storage pathways and/ fragments. The sandstones can be classified as both sub- or leaching also contribute to the formation of clastic litharenite and subarkose.
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  • Niche Partitioning Shaped Herbivore Macroevolution Through the Early Mesozoic ✉ Suresh A
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