Mount Cayley - Geology


Like other volcanoes in southwestern British Columbia, Mount Cayley lies within the Coast Plutonic Complex, which is the single largest contiguous granite outcropping in North America. The intrusive and metamorphic rocks of the Coast Plutonic Complex extend approximately 1,800 kilometres (1,100 mi) along the coast of British Columbia, the Alaska Panhandle and southwestern Yukon. This is a remnant of a once vast volcanic arc called the Coast Range Arc that formed as a result of subduction of the Farallon and Kula Plates during the Jurassic-to-Eocene periods. In contrast, Mount Cayley, Mount Meager, Mount Garibaldi and Silverthrone Caldera are of recent volcanic origin.

Mount Cayley consists mostly of an igneous rock with a high iron content called dacite, although another igneous rock, rhyodacite, with intermediate composition of dacite and rhyolite is also present. Unlike many of the other volcanoes further south, Cayley does not dominate the surrounding landscape, which consists of high, rugged peaks.

Read more about this topic:  Mount Cayley

Other articles related to "geology":

Sugar Land, Texas - Geography and Climate - Geology
... Underpinning the area's land surface are unconsolidated clays, clay shales, and poorly-cemented sands extending to depths of several miles ... The region's geology developed from stream deposits from the erosion of the Rocky Mountains ...
History Of Biology - 19th Century: The Emergence of Biological Disciplines - Natural History and Natural Philosophy - Geology and Paleontology
... See also History of geology and History of paleontology The emerging discipline of geology also brought natural history and natural philosophy closer together the establishment of the stratigraphic column ... Charles Lyell's influential Principles of Geology (1830) popularised Hutton's uniformitarianism, a theory that explained the geological past and ...
Regional Geology - By Planet
... Geology of Mars Geology of Mercury Geology of the Moon Geology of Venus ...
Basin And Range Province - Geology
... The average crustal thickness of the Basin and Range Province is approximately 30 – 35 km and is comparable to extended continental crust around the world ... The crust in conjunction with the upper mantle comprises the lithosphere ...