ⓘ Sundance Sea. The Sundance Sea was an inland or epeiric sea covering much of western North America in the Jurassic period. It was an arm of what is now the Arct ..


ⓘ Sundance Sea

The Sundance Sea was an inland or epeiric sea covering much of western North America in the Jurassic period. It was an arm of what is now the Arctic Ocean, and extended through what is now western Canada into the central western United States. The sea receded when highlands to the west began to rise.


1. Stratigraphy

The Sundance Sea did not occur at a single time; evidence suggests that it was a series of five successive marine transgressions. Each was separated by a period of erosion.The sea advanced and receded from the Middle Jurassic onwards. The terrestrial sediments of the Morrison Formation – eroded from rising highlands to the west – were deposited on top of the calcareous Sundance Formation as the sea retreated for the last time, late in the Jurassic.

The sedimentary rocks which formed in and around the Sundance Sea are often rich in fossils.


2. Fauna

The Sundance Sea was rich in many types of animals. The oyster Gryphaea was very common, and shark teeth have been found. Fish, belemnites and to an extent ammonites swarmed in shoals. Crinoids and bivalvia dotted the seafloor. Ophthalmosaurus, a large ichthyosaur, swam in the seas using its large, long jaws to catch belemnite squid. Pantosaurus, a plesiosaur the size of a seal, went after the easier-to-catch fish. The largest marine reptile in the Sundance Sea was Megalneusaurus, a large pliosaur similar to Liopleurodon. Its fossils have been found in Alaska and Wyoming, which were both covered by the Sundance Sea when it was alive.

During the periods of recession, dinosaurs and other Jurassic animals walked on the shores, leaving fossil footprints.

  • periods, shallow seas inside continents. Much of present - day North America was covered by an epicontinental sea called the Sundance Sea during the Jurassic
  • oxygen - depleted waters. Sundance Sea Jurassic period also called the Cretaceous Seaway, the Niobraran Sea and the North American Inland Sea Oceans of Kansas
  • the Jurassic Coast in southern England, and in the margins of the old Sundance Sea in the United States. It is a marine bivalve mollusc in the family Gryphaeidae
  • the Sundance Sea during the Jurassic period. In the Cretaceous an even larger area was covered by the Western Interior Seaway. Continental seas have
  • course of time, this became the Morrison Formation. In the north, the Sundance Sea an extension of the Arctic Ocean, stretched through Canada down to the
  • environments. This is a world wide environmental problem. In April 2008, Richard Sundance Owen, a building contractor and scuba dive instructor, started the Environmental
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  • Women in Love 1970 Robert Redford Butch Cassidy and the Sundance Kid as the Sundance Kid, Downhill Racer as David Chappellet, and Tell Them Willie
  • Performance Antony Gibbs Taking Off John Carter 1970 Butch Cassidy and the Sundance Kid John C. Howard Richard C. Meyer MASH Danford B. Greene Ryan s Daughter
  • film High School Musical 3. Falkenstein, Michelle. From Maplewood To Sundance The New York Times, January 30, 2005. Accessed August 10, 2012. In 1988
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