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X-WR-CALNAME:Planetary Science and Exploration Seminar\, Claire Blaske: "Me
 gaflood Duration from Bedform Pattern Disequilibrium in Outflow Channels 
 of Mars"
X-WR-TIMEZONE:Pacific Time (US & Canada)
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DTSTAMP:20260722T225723Z
UID:tag:localist.com\,2008:EventInstance_52462137114312
DTSTART:20260401T193000Z
DTEND:20260401T202000Z
DESCRIPTION:Planetary-scale outflow channels were carved by catastrophic fl
 oods flowing into Mars’ northern lowlands\, inspiring the hypothesis tha
 t they may have fed oceans. However\, the sizes and durations of these cat
 astrophic events remain highly debated.  To estimate flood discharge\, pre
 vious studies have typically assumed that canyons were filled to the brim 
 with water\, ignoring the progressive deepening of gorges as floods carve 
 into bedrock. As a result\, discharges are grossly overestimated and estim
 ated flood durations are unrealistically short. To improve upon previous e
 stimates\, we develop a new approach to estimating flood duration that is 
 grounded in sediment-transport mechanics and bedform morphodynamics. First
 \, we validate the approach at a well-documented terrestrial analog site
 —giant gravel ripples in the Channeled Scablands of Washington\, USA. Se
 cond\, we apply the new framework to a field of multi-meter dunes along th
 e bed of Athabasca Valles\, Mars. Our results provide an independent const
 raint on the duration of the floods that carved the Outflow Channels and b
 ear significance to our understanding of the sources and lifetime of poten
 tial early oceans on Mars. \n\nSpeaker-suggested reading: Durrant\, L.\, B
 alme\, M.R.\, Carling\, P.A.\, and Grindrod\, P.M.\, 2017\, Aqueous dune-l
 ike bedforms in Athabasca Valles and neighbouring locations utilized in pa
 laeoflood reconstruction: Planetary and Space Science\, v. 148\, p. 45–5
 5\, doi:10.1016/j.pss.2017.10.008.\n\nBio: I am a 3rd year PhD candidate i
 n the Department of Earth and Planetary Sciences\, working with Prof. Math
 ieu Lapôtre. Broadly\, my research interest lies in the geomorphology and
  evolution of planetary surfaces across the solar system (specifically pla
 nets with water\, past or present!). My PhD research focuses on better und
 erstanding the climate and hydrology of early Mars through sediment transp
 ort physics\, machine learning\, and Earth analogues. I graduated from Ari
 zona State University in 2023 with a Bachelor’s in Astrophysics and a mi
 nor in Geology. My undergraduate research spanned dynamo production in roc
 ky exoplanets\, “lightning” flashes (caused by meteors) in the atmosph
 ere of Venus\, and martian spectroscopy and water ice deposits. In my free
  time\, I am a competitive curler!
GEO:37.426402;-122.172635
LOCATION:Mitchell Earth Sciences\, 350/372
SUMMARY:Planetary Science and Exploration Seminar\, Claire Blaske: "Megaflo
 od Duration from Bedform Pattern Disequilibrium in Outflow Channels of Ma
 rs"
URL;VALUE=URI:https://events.stanford.edu/event/planetary-science-and-explo
 ration-seminar-claire-blaske-megafloodduration-from-bedform-pattern-disequ
 ilibrium-in-outflow-channels-of-mars
CATEGORIES:Class/Seminar
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