State | Idaho |
---|---|
Name | Challis Volcanic Group. |
Geologic age | Eocene |
Lithologic constituents |
Major
Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic-tuff, Flow)
Igneous > Volcanic > Mafic-volcanic > Andesite (Pyroclastic-tuff, Flow)
Igneous > Volcanic > Felsic-volcanic > Rhyolite (Pyroclastic-tuff, Flow)
Minor
Igneous > Volcanic > Felsic-volcanic > Latite (Flow)
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow)
|
References | Lewis, Reed S., Link, Paul K., Stanford, Loudon R., and Long, Sean P., Geologic Map of Idaho, 2012, Idaho Geological Survey, Geologic Map 9 (M-9); Scale 1:500,000. |
NGMDB product | |
Counties | Bingham - Blaine - Bonneville - Butte - Camas - Clark - Clearwater - Custer - Fremont - Gooding - Idaho - Latah - Lemhi - Owyhee - Valley |