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Tag Archives: Geology
Conversations with Grok
Ultimately this is about the Shatsky/Laramide. A review of WB zones in Plates2 reveals that no current flat slab approaches the 1150 km penetration required for Shatsky to displace and underplate the Wyoming craton. Do you seriously believe the slab … Continue reading
North America Encounters the East Pacific Rise
The Yellowstone plume investigation keeps broadening. In the image below the heavy black line is the Pacific/Farallon ocean spreading ridge at ~30 million years ago when it first encountered North America. The current position of North America is outlined in … Continue reading
Posted in Climate, Geology, Plate Tectonics
Tagged earth-science, Geology, Subduction
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How Old is the Grand Canyon?
Controversies over wonders of the world capture the public imagination from time to time. Now some Caltech scientists have dared suggest from a new technique that measures the depth of overburden on apatite crystals that there was an older canyon … Continue reading
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