The Intermontane Islands were a giant chain of active volcanic islands somewhere out in the Pacific Ocean during the Triassic time beginning around 245 million years ago. An island (ˈaɪlənd or isle (/ˈaɪl/ is any piece of land that is completely surrounded by water in two dimensions above high tide and isolated from other significant The Pacific Ocean is the largest of the Earth 's Oceanic divisions The Triassic is a geologic period and system that extends from about 251 to 199 Ma (million years ago The giant chain of islands were 600 to 800 miles long and rode atop a microplate known as the 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 Over early Jurassic time the Intermontane Islands and the Pacific Northwest drew closer together as the continent moved west and the Intermontane Plate subducted. The Jurassic is a geologic period and system that extends from about Ma (million years ago to Ma that is from the end of the Triassic to the beginning The Pacific Northwest is a region in the northwest of North America (the term refers to the land not the ocean A continent is one of several large Landmasses on Earth. They are generally identified by Convention rather than any strict criteria with seven regions In Geology, a subduction zone is an area on Earth where two tectonic plates meet and move towards one another with one sliding underneath the other Eventually about 180 million years ago in the Mid-Jurassic time the last of the Intermontane Plate subducted and the Intermontane Islands collided with the Pacific Northwest. The Intermontane Islands were simply too big to sink beneath the continent so the Intermontane Islands welded onto the continent. Geologists call the ocean that existed between the Intermontane Islands and North America the Slide Mountain Ocean. An ocean (from Greek, ''Okeanos'' (Oceanus) is a major body of saline water, and a principal component of the Hydrosphere. The Slide Mountain Ocean was an ancient Ocean that existed between the Intermontane Islands and North America sometime during the Triassic time
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A volcanic arc is a chain of volcanic islands or Mountains formed by Plate tectonics as an oceanic Tectonic plate subducts under 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 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 Belt is a Physiographic region in British Columbia, Canada.Dapyx Software network: MP3 Explorer | Ebook Manager | Zenithic