WAJV


WAJV

W A J V

WAJV - Washington Jurassic Volcanoes Guide : a guide to volcanic rocks produced by Jurassic Volcanoes in Washington State

WAJV




Pre Middle Jurassic volcanic rocks found in Washington State


Primary rock type: greenstone
Secondary rock type: spilite
Other rock types: slate; argillite; graywacke; keratophyre; amphibolite; diorite



Middle Jurassic volcanic rocks found in Washington State


Primary rock type: andesite
Secondary rock type: dacite
Other rock types: argillite; slate; graywacke



Upper Jurassic volcanic rocks found in Washington State


Primary rock type: aphanitic (volcanic rock)
Secondary rock type: phaneritic (plutonic rock)
Other rock types: metavolcanic rock, metasedimentary rock, sedimentary rock





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