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The Impact Cratering Record on Earth: From the Field to the Lab

Tuesday, March 14, 2023, 8:20 AM
Montgomery Ballroom

Sarah Simpson
Steven Jaret
Annabelle Gao
8:20 AM
Session Introduction
8:25 AM
Garvin J. B.* Tucker C. J. Anderson C. McClain D. R. Melocik K. et al.
Reassessing the Past Million Years of NEO Impact Cratering on Earth via High Resolution Digital Topography [#2608]
Estimation of final apparent impact crater diameters on Earth can be facilitated via analysis of newly available topography data for ultra-recent examples.
8:35 AM
King D. T.* Ormo J. Petruny L. W. Adams M. C. Adrian D. R. et al.
Re-Interpretation of the Flynn Creek Impact Structure, Tennessee [#1501]
Flynn Creek is a 3.8-km marine-target impact structure that was formed during the Late Devonian. We argue here that Flynn Creek is not a complex impact structure.
8:45 AM
Svensson M. J. O.* Osinski G. R. Longstaffe F. J. Goudge T. A.
8:55 AM
Broad K. E.* Sadler B. O. Hoover S. L. James P. B. Robitaille B. A. et al.
A Gravity Survey of the Kentland Crater Formation [#2715]
Kentland Crater gets / A modern gravity map / And blurs the (rim) lines?
9:05 AM
Panel Q&A
9:25 AM
Losiak A.* Szokaluk M. Rozwalak P. Sierzputowska A. Baranowska M. et al.
Dating Morasko Crater (Poland) — Insights into the Problem of Dating of Small Impact Craters [#1699]
“Follow these three easy steps” to date your very small impact craters. Also, Morasko is 4570–4420 cal BP.
9:35 AM
Shteynman L.* Sharp T. G.
Does Reidite Formation Reset U-Pb Ages: Direct Measurements from Rochechouart Impact Structure [#2327]
In polymorph news / When isotopes try to leave / Reidite holds on tight.
9:45 AM
Chinchalkar N. S.* Osinski G. R. Erickson T. M. Cayron C.
Superheated Melt at West Clearwater Impact Structure: Evidence from Cubic Zirconia [#1768]
We report the first occurrence of cubic zirconia, a high-temperature zirconia polymorph, at West Clearwater impact structure.
9:55 AM
Simpson S. L.* Rampe E. B. Christoffersen R. Keller L. P. Jakubek R. et al.
High Resolution Imaging and Analysis of Terrestrial Impact Glass: Amorphous Materials, Phyllosilicates and Everything in Between [#1738]
TEM, XRD, and Raman analyses of altered impact glass reveals a complicated relationship between amorphous silicate, amorphous carbon, clays, and clay-like phases.
10:05 AM
Panel Q&A
10:25 AM
Spray J. G.* Tschauner O. Ma C. Thompson L. M. Hopkins R. H.
In Situ Shock Veins on Earth: Donwilhelmsite, Maskelynite, Stishovite, Stöfflerite, Tissintite (and more) from the Manicouagan Impact Structure [#1307]
We describe the terrestrial geologic setting and P-T-t constraints for several mineral species in shock veins previously only described from meteorites.
10:35 AM
Timms N. E.* Rae A. S. P. Beetge I. Cavosie A. J. Anderson S. L. et al.
Geometry, Source, Timing, and Mechanism of Melt Intrusions in Complex Terrestrial Craters: Insights from the Yarrabubba Impact Structure, Western Australia [#1812]
Field mapping at Yarrabubba and iSALE simulations provide new insights into the geometry, timing, and mechanisms of impact melt intrusion in complex craters.
10:45 AM
Huber M. S.* Kovaleva E. Tisato N. Rae A. S. P. Gulick S. P. S.
How Low Can Craters Go? Testing the Maximum Identifiable Depth of Eroded Impact Craters at the Vredefort Impact Structure [#2063]
Craters can be quite large / Erode to the depths, what will remain? / Physical properties hide all secrets.
10:55 AM
Barrett T. J.* Robinson K. L. Nagashima K. Huss G. R. Boyce J. W. et al.
A Chlorine Isotope Transect Across the Sudbury Impact Deposits Reveals Enigmatic Isotopic Fractionation [#2652]
We present chlorine isotope analysis for the Sudbury impact crater to test the linkage between large-scale impacts and isotope fractionation seen on the Moon.
11:05 AM
Panel Q&A
11:25 AM
Session Closure