2020-11 PGS Newsletter
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DECEMBER 2020 PGS NEWSLETTER VOL LXXIII NO 4 December 16, 2020 A Unique Early Permian Vertebrate Fauna from the Bromacker Quarry, Virtual Meeting Times Board Meeting 6:00 PM Central Germany Social Gathering 7:00 PM Presentation 7:30 PM Pre-Registration is Required PGS members and guests must RSVP by December 15 to receive the meeting Zoom link. Register here: pittsburghgeologicalsociety.org PDH Certificates are Available Attendees can receive an emailed PDH certificate at their request. Non- PGS members are asked to kindly donate $10 to either the Pittsburgh Geological Society Endowment Fund or the PGS Galey Fund for Students when they request a certificate on the PGS website. Online Meeting Guidelines Amy C. Henrici All attendees are encouraged to join the meeting no later than 7:20 PM Carnegie Natural History Museum, when announcements will be made. PGS requests all attendees to mute Section of Vertebrate Paleontology their own audio and video during the presentation to avoid disruptions and Friends and Family are Welcome to View This Meeting! to lower bandwidth. Please RSVP by December 15 to receive the Zoom link. , Speaker Abstract Vertebrate fossils were discovered at the Bromacker quarry by geologist Dr. Thomas Martens in 1975, a time period when the region was part of former East Germany. After the reunification of East and West Germany in 1990, the Carnegie Museum of Natural History (CMNH) sponsored a six-month Pittsburgh visit by Martens to work on his fossils with Dr. Dave Berman, an expert on Late Paleozoic tetrapods. This began a collaboration that has continued to present time. The fossils from the Bromacker quarry are preserved in the Early Permian Tambach Formation and are about 290 million years old. The Tambach Formation was deposited in a small, intermontane basin, the Tambach Basin, that was internally drained and at times lacked permanent water, a rarely preserved setting for Early Permian times. Extremely well-preserved, nearly complete and articulated vertebrate fossils primarily occur in two massive sheet flood units in the Bromacker quarry strata. The flooding events that formed these units are thought to have killed and buried the animals preserved within them. The Bromacker vertebrate fauna consists of a variety of terrestrial amphibians and reptiles and is dominated by herbivores. Because no fossils of fish or aquatic animals have been discovered in over 35 years of collecting, they presumably did not inhabit the Tambach basin. This is in stark contrast to vertebrate faunas from contemporaneous localities in the American southwest that were deposited in coastal and alluvial plains. Faunas from these settings contain fish and mainly aquatic and semi- terrestrial amphibians and reptiles, with carnivores outnumbering herbivores. Thus, the invasion of vertebrates into upland regions away from permanent water and the associated food resource of aquatic and semi-terrestrial vertebrates, seems to have led to the diversification of herbivorous tetrapods and the development of the modern terrestrial ecosystem, in which numerous herbivores support a few top carnivores. Speaker Biography Amy C. Henrici is a Collection Manager in the Section of Vertebrate Paleontology, Carnegie Museum of Natural History (CMNH). She received a BA in Biology from Hiram College in 1979 and a MS in Geology from the University of Pittsburgh in 1989. She began her career in the Section of Vertebrate Paleontology at CMNH in 1979 as a Laboratory Technician. She became a Curatorial Assistant in 1980 and worked as a Scientific Preparator from 1984–2004. From 2003–2004 she also served as Acting Collection Manager and became Collection Manager in 2005. Her field experiences span the Late Paleozoic–Quaternary. More specifically, she has collected fish, amphibian, and reptile fossils from the Late Paleozoic of western USA and Germany; frog, dinosaur and mammal fossils from the Mesozoic of USA; and mammal and herp fossils, including frogs, from the Cenozoic of USA. Henrici’s Master Thesis described fossil frogs she collected from the Eocene of central Wyoming, and she has since published on frog fossils from the Mesozoic–Cenozoic. She began collaborating with Dr. Dave Berman (now Curator Emeritus at CMNH) on research projects involving Late Paleozoic fossil vertebrates in 1998 while preparing fossils under his supervision. This collaboration continues today and currently focuses on vertebrate fossils from the Cutler Group in southeastern Utah and the Bromacker quarry in central Germany. 2 PRESIDENT’S STATEMENT As I think back about this time last year, I I was thinking recall the excitement for the holidays and about the the end of another year. It is amazing how Anthropocene as I things have changed in a short period of graded an exam time. Holding virtual meetings and happy question. As I hours with friends over Zoom was the read the student’s farthest thing from my imagination. Last response, I year, I was thinking about the changes in thought about the weather and wondering if the upcoming Albert Kollar and winter months would result in many hours his contributions to our understanding of the digging out from a snowstorm the night Anthropocene with his analysis of before. This year, as I stay confined to my landscape paintings (Wendel, 2018; Kollar home, teaching remotely, I wonder when and Hughes, 2017; Kollar and Brezinski, the pandemic will end and what it will look 2010). The student argued that there is no like. Will we all give a sigh of relief and run evidence to support the Anthropocene as a outside in one large global dance party. formally defined geochronologic unit. How will this be captured in history? Will there be The term landscape Anthropocene paintings that was introduced will capture by Crutzen and these few Stoermer in years? If so, 2000 for the what will the period in scenes be? Is Earth’s history there any clear that is being evidence in the altered by 2020 human landscape that activities. captures the These true essence of activities have John Kane, Nine Mile Run Seen from Calvary, c. 1928. this time? resulted in extinctions of plant and animal species, At this upcoming holiday meeting, it would polluted oceans and an altered be fun to have this discussion with Albert atmosphere. The student claimed there are Kollar. I look forward to getting back to no data, however, Albert Kollar has the museum and having good discussions provided clear evidence of this in his with Albert and others about the papers. After reading the response several Anthropocene, ancient life, and societal times, I realized that the student was using times. I am sure that during this crazy time the wrong word in the response. I think the our discussions would be rather lively. student meant to use chronostratigraphic Please join me Wednesday December 16 unit instead recognizing the lack of a for our traditional holiday meeting where we stratigraphic rock record. welcome any friends and family (in your Covid-19 bubble) to watch the presentation 3 with you. Distant friends and relatives can There is one last PGS board member to RSVP for the Zoom link at no charge. introduce this month: In closing, I want to remind you to renew Michael Keeliher: your membership and thank those that After getting out of the service in 1970, I already have. Thanks also to our corporate attended community college and later sponsors who help support all the PGS graduated from the University of Maryland in programing throughout the year. As we 1974, all on the GI Bill. My first job was for a end the year, please remember that if you geotechnical engineering firm where I worked in are considering a last-minute charitable a soils lab and stood behind a drilling rig. One contribution, please think of PGS. of my past professors called us “dirt squeezers”. On one project, I went to Frostburg Have a wonderful holiday, please be safe, State College, which was underlain by the stay well and I look forward to seeing you at Pittsburgh Coal seam, to investigate the last meeting of 2020. subsidence risk. This was partly in response to a scandal propagated by Spiro Agnew involving Happy holidays! bribery and kickbacks for highway engineering contracts awarded in Maryland. (Editor’s note – ASCE has an interesting article Kollar, A.D., and Kay Hughes. 2017. Geology about the consequences faced by the highway of the Landscape Paintings at the engineers after this scandal: Carnegie Museum of Art, A Reflection of https://www.asce.org/question-of-ethics- the Anthropocene, 1860 to 2017. articles/oct-2005/) Geological Society of America, Abstracts with Programs, v. 49, 243. Then on to the rest of Maryland and southern West Virginia to explore for coal. I went to Kollar, A.D., and D.K. Brezinski. 2010. Geology, Colorado to help run an office and learned Landscapes and John Kane’s about expansive clays. Changed jobs and Landscape Paintings. PAlS Publication worked for a division of Island Creek Coal 10, 5. (See note below for link.) Company, exploring for coal in many parts of the west. That office closed when Occidental Wendel, J. (2018), A window into the emerging Petroleum, the parent company, purchased Anthropocene…through art, Eos, 99, Cities Service for 4 billion bucks. Landed a job https://doi.org/10.1029/2018EO088375. with Michael Baker in Denver. When they Published on 09 January 2018. closed, I was asked to move to the main office in Beaver County. That’s when I joined PGS in 1986. Editor’s Note – Among his numerous other I was in the environmental division, going out to contributions to PGS, Albert Kollar has superfund and CERCLA sites to evaluate all the graciously allowed us to share an archive of messes. I went to a consulting firm which had PAlS brochures on our website.