Western Interior Seaway Map

The western interior seaway was a large inland sea that existed during the mid to late cretaceous period as well as the very early paleogene splitting the continent of north america into two landmasses laramidia to the west and appalachia to the east.

Western interior seaway map. The wyld et al. Its deepest point was only about 800 or 900 meters about half a mile underwater relatively shallow for a sea. The western interior seaway was a shallow sea filled with abundant marine life.

The cretaceous aged rocks of the continental interior of the united states from texas to montana record a long geological history of this region being covered by a relatively shallow body of marine water called the western interior seaway wis. At its largest it was 2 500 feet deep 600 miles wide and over 2 0. Western interior seaway 89 8 ma turonian late western interior seaway 92 1 ma turonian middle western interior seaway 94 9 ma cenomanian late.

The ancient sea stretched from the gulf of mexico and through the middle of the modern day countries of the united states and canada meeting with the arctic ocean to the north. The western interior seaway was among the largest continental seas of all time stretching from utah in the west to the western appalachians in the east a total of about 1000 km 621 mi wide. Seven key time slice maps 130 115 105 92 85 77 and 72 ma overlap with the wis maps.

Atlas all species geology geology of the western interior seaway. Mosasaurs growing up to 18 meters long ichthyosaurs one specimen from pink mountain in british columbia is currently the largest ichthyosaur specimen found to. During its maximum extent approximately 92 million years ago it was 2000 miles long 600 miles wide and 2500 feet deep stretching from the gulf of mexico to the arctic ocean.