Raspberry Formation
geologic formation in British Columbia
The Raspberry Formation is a stratigraphic unit of Miocene age in northwestern British Columbia, Canada.
Name
The Raspberry Formation takes its name from Raspberry Pass, a mountain pass cutting through the central portion of the Mount Edziza volcanic complex.
Geology
The Raspberry Formation has a volume of 119 km3 (29 mi3), making it the third most voluminous geological formation comprising the Mount Edziza volcanic complex. It varies in elevation from less than 1,310 m (4,300 ft) along the Mess Creek Escarpment to 1,740 m (5,710 ft) near Armadillo Peak.
The Raspberry Formation is overlain conformably by the Little Iskut Formation. An erosion surface separates the Raspberry Formation from the overlying Armadillo Formation and younger geological formations. Rocks of the Stikinia terrane underlie the Raspberry Formation.
The Raspberry Formation consists of flat-lying alkali basalt and hawaiite flows. These flows are rusty brown and are interbedded with reddish-brown to yellow or orange scoria. The Raspberry Formation represents three overlapping Miocene shield volcanoes.
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This entry incorporates text from “Raspberry Formation” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.