Geologic units containing bimodal suite

Earth material > Volcanic rock > Lava flow

Bimodal suite

A mixed sequence of sub-equal amounts of felsic and mafic volcanic rocks, commonly rhyolite and basalt with little or no intermediate composition rock.

Subtopics:
(none)

Idaho - New Hampshire

Idaho

Rhyolitic domes, flows, pyroclastic debris, and basalt flows; Early Pleistocene subvolcanic to volcanic features; eastern Snake River Plain (Early Pleistocene): Lower Pleistocene to Pliocene silicic volcanic units near the Snake Plain.
Shale, arenite, conglomerate, intermediate and felsic volcanic rocks; Late Proterozoic rifted continental margin; southeastern Idaho (Late Proterozoic): Younger Precambrian volcanic and diamictic units of central and southeastern Idaho.

New Hampshire

Ammonoosuc Volcanics, Bimodal volcanic rocks (Middle - Upper Ordovician): Ammonoosuc Volcanics, Bimodal volcanic rocks - Locally includes unmapped Oals.
Ammonoosuc Volcanics, Bimodal volcanic rocks (Middle - Upper Ordovician): Ammonoosuc Volcanics, Bimodal volcanic rocks.

Accessibility FOIA Privacy Policies and Notices

U.S. Department of the Interior | U.S. Geological Survey
URL: http://mrdata.usgs.gov/geology/state/sgmc-lith.php?text=bimodal%20suite
Page Contact Information: pschweitzer@usgs.gov
Page Last modified: 11:56 on 09-Apr-2013