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Impact Ejecta Products and Processes: What Goes Up Must Come Down

Tuesday, March 14, 2023, 2:15 PM
Montgomery Ballroom

Ania Losiak
Chris Cline
Nacia Luo
2:15 PM
Session Introduction
2:20 PM
Blance A. J.* Rothery D. A. Balme M. R. Wright J. Galluzzi V. A.
Far Greater Population of Flow Deposits Around Mercurian Impact Craters than Previously Known [#2322]
Global survey of flow features around craters on Mercury, identifing at least 39 examples. Distribution, characteristics, and potential origins considered.
2:30 PM
Burley J. M.* Tornabene L. L. Osinski G. R. Grant J. A. El-Maarry M. R.
Distal Flows Associated with Some of the Best-Preserved Craters on Mars: Implications for Extensive Impact-Related Landscape Modification (an Update) [#1593]
Updated analysis of impact craters on Mars with expansive distal flow deposits (DFDs): Consistent flow phenomena within several distal ejecta zones is reported.
2:40 PM
Neish C. D.* Virkki A. K.
The Unusual Surface Texture of Venusian Impact Ejecta [#1052]
Melt flows like lava / Smooths venusian ejecta / Botox for craters.
2:50 PM
Alexander A. M.* Grimm R. E. Kirchoff M. R.
Formation of Layered-Ejecta Craters During Martian Glaciations: Insights from Numerical Modeling [#2795]
We model impacts with iSALE 2D to asses the minimum thickness of surface ice needed to form layered-ejecta craters on Mars.
3:00 PM
Panel Q&A
3:20 PM
Nypaver C. A.* Thomson B. J. Moersch J. E. Kring D. A.
A Drone-Based Thermophysical Investigation of Barringer Meteorite Impact Crater Ejecta [#2479]
Meteor Crater / Drone-based thermal inertia / What can it tell us?
3:30 PM
Prieur N. C.* Amaro B. Gonzalez E. Rubanenko L. Xiao Z. et al.
Distribution of Impact-Generated Boulders on Planetary Surfaces: Influence of Target Fracturation and Lithology [#2903]
A CNN is used to detect boulders around fresh impact craters. This database helps us understand the effect of target properties on crater ejection mechanisms.
3:40 PM
Grindrod P. M.* Davis J. M. Harris E. Fawdon P. Favaro E. A. et al.
Extensive Secondary Cratering in the ExoMars Landing Site at Oxia Planum [#1113]
Small craters abound / Perhaps most from Mojave / ExoMars can test.
3:50 PM
Chertok M. A.* Lucey P. G. Costello E. S. Ireland S. M.
Mare Protolith Properties and Secondary Impacts Inferred from Rocky Crater Populations [#1339]
We identify controls on rock abundance in crater ejecta by inspecting the size-frequency distributions of rocky crater populations across the lunar maria.
4:00 PM
Panel Q&A
4:20 PM
Miklavcic P. M.* Lee M. Tokar E. Askari H.
Examining Froude Number as a Scaling Factor for Granular Media in Changing Gravity Using Dynamic Resistive Force Theory [#2863]
Dynamic Resistive Force Theory is modified to study Froude number scaling for oblique granular impacts in varying gravity. Discrete simulations verify findings.
4:30 PM
Yamaguchi Y.* Nakamura A. M.
Laboratory Experiments on Effect of Target Properties on Impact Ejecta Escaping from Martian Surface [#1304]
We performed impact experiments to study the size-velocity-ejection angle relationship for ejecta faster than kilometers per second and its dependence on target properties.
4:40 PM
Cline C. J.* Cintala M. J. Anderson J. L. B. Bart G. D.
4:50 PM
Dobson M. J. Schulz T. Koeberl C.* Campbell K. A. Rowe M. et al.
Earth's Oldest Preserved Extraterrestrial Impact Deposit? Evidence for a Large Impactor 3.48 Billion-Year-Ago (Dresser Formation, Pilbara Craton, Australia) [#1628]
Spherule-rich horizons in the ~3.48 Ga Dresser Formation, Pilbara Craton contain textural and preliminary geochemical results suggesting an impact origin.
5:00 PM
Panel Q&A
5:20 PM
Session Closure