Metavolcanic rocks

Metamorphosed (generally greenschist-facies) andesite and dacite flows and breccias, flow-banded rhyolite and rhyodacite, welded tuff, local hypabyssal intrusive rocks, and minor amounts of volcaniclastic sandstone and conglomerate (Greene, Stewart, and others, 1991). This unit includes the Peavine sequence in Washoe County, and other unnamed metasedimentary and metavolcanic rocks in Lyon, Douglas, Carson, and Churchill Counties. These rocks are considered distinct from the other metavolcanic and metasedimentary rocks in adjacent Mesozoic terranes. They are included in unit JTRsv on the 1978 State map.
State Nevada
Name Metavolcanic rocks
Geologic age Jurassic (?) and Triassic (?)
Lithologic constituents
Metamorphic > Metaigneous > Metavolcanic > Metarhyolite (Greenschist)
Metamorphic > Metaigneous > Metavolcanic > Metaandesite (Greenschist)
Metamorphic > Metaigneous > Metavolcanic > Metadacite (Greenschist)
Metamorphic > Metasedimentary > Metaclastic > Metasandstone (Greenschist)
Igneous > Hypabyssallocal hypabyssal intrusive rocks
Metamorphic > Metasedimentary > Metaclastic > Metaconglomerate (Greenschist)
NGMDB product
Counties Churchill - Douglas - Storey - Washoe - Carson City