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UTIG Seminar Series Online: Kristine DeLong, Louisiana State

April, 03 2020

Time: 10:30 AM - 12:00 PM
Location: Zoom Meeting


THIS IS A ZOOM MEETING. SEE EMAIL ANNOUNCEMENTS FOR INFORMATION ON HOW TO JOIN.
Contact costa@ig.utexas.edu if you are not on the seminar email lists.

Speaker: Kristine DeLong, Associate Professor of Geography, Louisiana State University

Host: Jud Partin

Title: The Alabama Underwater Forest: A Time Capsule from the Last Ice Age

Abstract: In 2004, energetic waves from Hurricane Ivan exposed the stumps of bald cypress trees (Taxodium distichum) preserved in their growth position below the seafloor on the northern Gulf of Mexico continental shelf. These in situ stumps located ~13 km offshore Gulf Shores, Alabama in ~18 m of water represents the only identified submerged Pleistocene forest assemblage found thus far. We dated the site using optically stimulated luminescence and radiocarbon dating yielding ages between 74–42 ka suggesting this wood was preserved for ~50 ka during falling sea levels of the last ice age and eventual transition to the Holocene marine environment. Phase 1 of the project mapped the site area with bathymetric and sub-bottom surveys, characterize the sediment and depositional environment using vibracores, and developed tree-ring, pollen, seed, and foraminifera chronologies to better understand the environment the trees lived in. Foraminiferal assemblage analysis reveals that the transitional layer of interbedded sand and mud above the Pleistocene floodplain facies is late Holocene in origin and is part of a lower shoreface or marine-dominated estuarine environment. Seeds recovered from the Pleistocene floodplain sediments, which also contains woody remnants, generally agrees with pollen results. Stratigraphy within the study area suggests paleo-topographic relief was established prior to 56 ka and persisted until Holocene transgression. This site is likely a bald cypress backwater swamp with little water mixing promoting anoxic conditions in sediments that lead to the preservation of organic materials for more than ~50 ka. We suggest that paleo-topographic relief created enough accommodation space for sediment infill to bury and preserve this forest during the late Pleistocene lowstand. We hypothesized that rapid increases in global sea level occurring ~60 ka and ~40 ka provided opportunities for local floodplain aggradation to bury the swamp thus preserving the tree stumps. We are developing a geophysical methodology to identify and map buried tree remains and a model to predict other forest sites on the continental shelf in Phase 2 that will start this year.

UTIG Seminar Series: Brian Boston, Lamont-Doherty Earth Observatory

April, 10 2020

Time: 10:30 AM - 12:00 PM
Location: PRC ROC Room 1.603

Speaker: Brian Boston, Postdoctoral Research Scientist, Lamont-Doherty Earth Observatory

Host: Harm van Avendonk

Title:

Abstract:

UTIG Brown Bag: James Biemiller (PhD talk)

April, 14 2020

Time: 12:00 PM - 1:00 PM
Location: PRC ROC Room 1.603

Informal weekly presentations by UTIG students and researchers. Bring your lunch!

Speaker: James Biemiller, Graduate Research Assistant, UTIG

More info.

UTIG Seminar Series: Beata Csatho, University at Buffalo

April, 17 2020

Time: 10:30 AM - 12:00 PM
Location: PRC ROC Room 1.603

Speaker: Beata Csatho, Professor of Geology, University at Buffalo

Host: Ginny Catania

Title:

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UTIG Brown Bag: Kelly Olsen

April, 21 2020

Time: 12:00 PM - 1:00 PM
Location: PRC ROC Room 1.603

Informal weekly presentations by UTIG students and researchers. Bring your lunch!

Speaker: Kelly Olsen, Graduate Research Assistant, UTIG

More info.

UTIG Seminar Series: Ross Parnell Turner, Scripps

April, 24 2020

Time: 10:30 AM - 12:00 PM
Location: PRC ROC Room 1.603

Speaker: Ross Parnell Turner, Assistant Professor of Marine Sciences, Scripps Institution of Oceanography

Host: Gail Christeson

Title:

Abstract:

UTIG Brown Bag: Natalie Wolfenbarger

April, 28 2020

Time: 12:00 PM - 1:00 PM
Location: PRC ROC Room 1.603

Informal weekly presentations by UTIG students and researchers. Bring your lunch!

Speaker: Natalie Wolfenbarger, Graduate Research Assistant, UTIG

More info.

Hot Science - Cool Talk: From a Dinosaur’s Roar to a Bird’s Song

May, 01 2020

Time: 7:00 PM - 8:15 PM
Location: Lady Bird Johnson Auditorium (LBJ)

Join us in celebrating the 20th anniversary of Hot Science - Cool Talks! Based on Hollywood movies, many of us imagine that a dinosaur may have roared like a lion, tiger or bear. But what if instead of roaring, dinosaurs instead cooed? By examining birds as living descendants of dinosaurs, Dr. Julia Clarke shares how and why ancient dinosaurs may have produced sounds.

UTIG Seminar Series: Becky Minzoni, University of Alabama

May, 01 2020

Time: 10:30 AM - 12:00 PM
Location: PRC ROC Room 1.603

Speaker: Becky Minzoni, Assistant Professor of Geological Sciences, University of Alabama

Host: Chris Lowery

Title:

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