Intrusive and extrusive igneous rocks (WYTii;0)

INTRUSIVE AND EXTRUSIVE IGNEOUS ROCKS--Composition ranges from hornblende monzonite to basalt. In Yellowstone area includes andesite and basalt of Emerald Lake (age about 2 Ma), rhyolite of Broad Creek, Pliocene Junction Butte Basalt, and gravel of Mount Everts. Age of basalt on Crescent Mountain 3.6 Ma.

State	Wyoming
Name	Intrusive and extrusive igneous rocks
Geologic age	Phanerozoic \| Cenozoic \| Tertiary \| Miocene Pliocene
Original map label	Tii
Primary rock type	granitoid
Secondary rock type	basalt
Other rock types
Lithologic constituents	Major Igneous > Volcanic > Mafic-volcanic > Andesite Igneous > Volcanic > Mafic-volcanic > Basalt Igneous > Plutonic > Syenitic > Monzonitehornblende monzonite Minor Igneous > Volcanic > Felsic-volcanic > Rhyolite
Map references	Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey. [http://pubs.er.usgs.gov/publication/ofr83802]
Unit references	Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey. [http://pubs.er.usgs.gov/publication/ofr83802]
Geographic coverage	Lincoln - Park - Teton