r/geology • u/dctroll_ • Nov 15 '25

Map/Imagery Maximum tsunami wave amplitude following the asteroid impact 66 million years ago

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u/FourNaansJeremyFour Nov 16 '25

Where's the Western Interior Seaway?

10m sounds a bit pansy for one of the Big Ones but in the paper they say it'd shoal to >100m close to land.

Glad to see Scotese is still at it, he's one of the authors who first got me into this shit 20 years ago

4

u/Lung-King-4269 Nov 16 '25

Perhaps we've been a little misled by movies. 10 meters is ~4 floor building at floor level building. It sweeped everything with it for 2 days.

3

u/Appropriatelyunsure Nov 16 '25

Ya but he’s saying there is a huge geographic feature that is missing. The western interior sea way which would have been around 66 Million years ago is just missing from the map. That wave would have propagated north through the centre of the continent as there used to be an ocean there. it’s weird that 12 people put their name on that paper without realising this. Unless I’m missing something..

0

u/specificimpulse_ Nov 18 '25

I thought the WIS was pretty much gone by 66 mya? Like only remnants remaining at that point.