Geologic units containing plutonic rock

Earth material

Plutonic rock

A rock formed at considerable depth by crystallization of magma and/or by chemical alteration. It is characteristically medium- to coarse-grained, of granitoid texture.

This category is also used for plutonic rock (phaneritic), mafic rock and plutonic rock (phanerit.

Subtopics:
Aplite
Porphyry
Pegmatite
Granitoid
Gabbroid
Alkalic intrusive rock
Ultramafic intrusive rock
Intrusive carbonatite

Alabama - Washington - Wyoming

Alabama

Talladega Group; Lay Dam Formation, unnamed diamictite facies (Silurian?-Devonian): Talladega Group; Lay Dam Formation, unnamed diamictite facies - Unnamed diamictite facies of Lay Day Formation in Coosa and Chilton Counties consists of cobbles and boulders of carbonate, pelitic rocks, quartzite, chert, felsic plutonic rocks, and gneiss in a metagraywacke matrix.

Washington

Carboniferous and Permian volcanic rocks (Devonian to Permian; Triassic in Asotin County): Predominantly altered andesite, basalt, and diabase with interbedded chert and argillite; includes some tuff, greenstone, and spilitic volcanic rocks; northern Cascade Mountains. Mostly schistose greenstone, some agglomerate, and rarely lapilli; includes minor beds of limestone with associated argillite and graywacke; northwestern Stevens County.

Wyoming

Rhyolite flows, tuff, and intrusive igneous rocks (Phanerozoic | Cenozoic | Quaternary | Pleistocene): RHYOLITE FLOWS, TUFF, AND INTRUSIVE IGNEOUS ROCKS--Includes Plateau Rhyolite (age about 0.07 Ma) and interlayered sediments, Mount Jackson Rhyolite (age 0.6 to about 1 Ma), Lewis Canyon Rhyolite (age about 0.9 Ma); and Lava Creek Tuff of Yellowstone Group (age 0.6 to about 1 Ma).

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