Intermontane Plate — The Intermontane Plate was an ancient oceanic tectonic plate, that lay on the west coast of North America about 195 million years ago. The Intermontane Plate had a chain of volcanic islands called the Intermontane Islands. The Intermontane… … Wikipedia
Intermontane Trench — The Intermontane Trench was an ancient oceanic trench during the Triassic time. The trench was probably 600 to 800 miles long running along the west coast of North America. The ocean that the trench was located in was called the Slide Mountain… … Wikipedia
Intermontane Belt — The Intermontane Belt is a physiographic region in British Columbia, Canada. It has rolling hills, high plateaus and deeply cut valleys. The rocks in the belt have very little similarities with North America. The granitic rocks in the region are… … Wikipedia
List of islands — This is a list of islands in the world grouped by oceans and by continents. For rank order lists, see the other lists below.List of islands by continent*Africa *Antarctica and Southern Ocean *Australia *Asia *Europe **European islands by area… … Wikipedia
Insular Islands — The Insular Islands were a giant chain of active volcanic islands somewhere in the Pacific Ocean during the Cretaceous time that rode on top a microplate called the Insular Plate, beginning around 130 million years ago. These islands collided… … Wikipedia
Oceanic trench — Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. The oceanic trenches are hemispheric scale long but narrow topographic depressions of the sea floor. They are also the… … Wikipedia
Volcanic arc — Mariana Islands, an oceanic island arc A volcanic arc is a chain of volcanoes positioned in an arc shape as seen from above. Offshore volcanoes form islands, resulting in a volcanic island arc. Generally they result from the subduction of an… … Wikipedia
Slide Mountain Ocean — The Slide Mountain Ocean was an ancient ocean that existed between the Intermontane Islands and North America sometime during the Triassic time beginning around 245 million years ago. The name comes from the Slide Mountain Terrane, a region made… … Wikipedia
Ocean — For other uses, see Ocean (disambiguation). Maps exhibiting the world s oceanic waters. A continuou … Wikipedia
United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… … Universalium
