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presentations, and socializing
starting at 7 pm most first Mondays of the month (September to May) in
Ricketson Auditorium at the Denver Museum of Nature and Science. There is no charge to attend the
Society's meeting and hear the lecture.
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Monday, November 7, 2016 - Show 'n Tell
Speakers: Steve Miller, Dennis Gertenbach
Christian Thurner, Evan Walsh
Western Interior Seaway Shorelines
Abstract: Bill Cobban was one of the most important paleontologists of the USGS, creating the finest divisions in geologic time during the Cretaceous through his study of fossils in the Western Interior Seaway. During his career, the developed the biochronology from 10 ammonite zones to over 60 ammonite zones (and even more fossil bivalve zones). Bill created over 80 maps with estimates of the western shoreline of the Western Interior Seaway based on fossil distribution and his understanding of the rocks from which the fossils were collected. Bill Cobban's biochronology and shoreline estimates form the basis of a website under development. The presentation talks about the project to develop the website.
Bio: Steve Miller is a WIPS member who has spent more than 10 years studying fossils and rocks of the Western Interior Seaway, particularly the outcrops of the Comanche National Grassland. Steve is also a USGS volunteer. He is developing the shorelines website with Kevin (Casey) McKinney, fossil collection curator at the USGS in Denver.
Bio: Dennis' passion is invertebrate fossils - collecting, identifying, and learning how fossils help us understand the earth in ancient times. He has been a member of the WIPS since 1999 and leads the PaleoZone for WIPS' children, the Invertebrate Study Group, the CSM Geology Museum paleo cataloguing project, and field trips for members. He served on the WIPS board for eight years, including serving as WIPS' president in 2014. Dennis earned his B.S., M.S., and Ph.D. in Chemical Engineering from the Colorado School of Mines and works part time as a vice president at Hazen Research, an engineering firm in Golden.
Cambrian through the Eocene - The WIPS 2016 Field Trip to Nevada and Utah
Abstract: This summer WIPS members traveled through time from the Cambrian through the Eocene, collecting fossils from 500 million years of Earth's history. Thanks to many hours of research and numerous scouting expeditions, Joe Dabelko put together a wonderful week-long trip to eastern Nevada and western Utah. The presentation will give everyone a taste of where we went and what we found. Come and enjoy trilobites from the Cambrian, brachiopods from the Permian, graptolites from the Ordovician, ammonoids from the Triassic, and lots of other interesting fossils.
Melted Shoes, Cedar Gnats and Theropod Scratch Marks, Hot Times in Western Colorado
The Dakota Sandstone is a major dinosaur track bearing formation in Western North America.
Recent discoveries published by WIPS members, Martin Lockley, Karen Houck, Nefra Matthews,
and Brent Breithaupt, and others, documented the existence of Theropod scrape marks that indicate
the first examples of mating behavior in dinosaurs. Since its publication a new scrape mark site was discovered.
I had the opportunity to assist Dr. Houck in the measurement of the strata holding those trace fossils and their
correlation with one of the sites that was documented in the first paper.
The work area was very hot and the cedar gnats were at their peak but we
were able to get some accurate measurements that established the stratigraphic position
of the new site relative to the former site. The scrape marks at these sites occur in swampy
coastal plain deposits. This coastal plain appears to have been the preferred habitat for
Theropod breading and nesting during the deposition of the Dakota Sandstone.
Bio: Christian Thurner has been a WIPS member since 1996 with two gaps because of work hours.
He is retired from the University of Denver and the Regional Transportation District.
He is a former WIPS board member who volunteers for many WIPS projects and has organized and led a "mini" WIPS field trip.
He has gone on five WIPS field trips and participated in seven dinosaur digs, and worked on WIPS' Bassum Park Project.
He was a member of Dr. Martin Lockley's field season at Lake Powell to document the then uncovered dinosaur tracks of its shores.
He also developed his own project to use Ground Penetrating Radar to find dinosaur tracks at Thermopolis, Wyoming.
The Ordovician/Silurian Mass Extinction