State | Wisconsin |
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Name | Volcanic rocks, undivided |
Geologic age | Early Proterozoic |
Lithologic constituents |
Major
Igneous > Volcanic (Flow, Pyroclastic)Mafic to felsic flows, pyroclastic rocks, impure quartzite, and conglomerate in Eau Claire River, Eau Claire and northern Clark Counties. Rhyolite has zircon ages of 1,858 +/- 5 Ma. Possibly correlative with Milladore Volcanic Complex.
Minor
Metamorphic > Metasedimentary > Metaclastic > QuartziteMafic to felsic flows, pyroclastic rocks, impure quartzite, and conglomerate in Eau Claire River, Eau Claire and northern Clark Counties. Rhyolite has zircon ages of 1,858 +/- 5 Ma. Possibly correlative with Milladore Volcanic Complex.
Sedimentary > Clastic > ConglomerateMafic to felsic flows, pyroclastic rocks, impure quartzite, and conglomerate in Eau Claire River, Eau Claire and northern Clark Counties. Rhyolite has zircon ages of 1,858 +/- 5 Ma. Possibly correlative with Milladore Volcanic Complex.
|
Comments | Marshfield terrane |
References | |
NGMDB product | |
Counties | Clark - Eau Claire |