Silurian Paleogeography, Southwestern US

Silurian Paleogeography, Southwestern US (430 Ma). Two views are shown, one focuses on the Western Interior and the second focuses off the west coast. They match across the zone of overlap. Shelf carbonates and deeper water shelf margin deposits grade westward into continental rise deposits and oceanic sediments in western Nevada and California

View to west of above. The rapidly moving Antler arc may have collided with off shore continental blocks. Between these blocks the arc bowed towards the edge of north America

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