Archive for: Volcanic activity

Rhyolitic obsidian flow, Oregon.

April 30, 2017/in Volcanic activity/by Marli Miller

volcanic, rhyolite, RGO, dwshed

Phreatic explosion crater. Death Valley, CA.

April 30, 2017/in Volcanic activity/by Marli Miller

volcanic

Ash Flow tuff, Crater Lake, (vertical)

April 30, 2017/in Extrusive, Igneous, Igneous Rocks, Volcanic activity/by Marli Miller

differential erosion, volcanic, pyroclastic, weathering, RGO, Cascade volcanoes

Pyroclastic rock, Oregon Cascades

April 30, 2017/in Extrusive, Igneous, Igneous Rocks, Volcanic activity/by Marli Miller

Cascade volcanoes

Edge of rhyolite flow, N. California

April 30, 2017/in Igneous, Volcanic activity/by Marli Miller

Cascade volcanoes

Obsidian and conchoidal fracture –volcanic glass

April 30, 2017/in Volcanic activity/by Marli Miller

Vitrophyre in welded tuff, SE California

April 30, 2017/in Extrusive, Igneous, Igneous Rocks, Volcanic activity/by Marli Miller

pyroclastic, volcanic

Mt. St. Helens and crater, 2014

April 30, 2017/in Volcanic activity/by Marli Miller

stratovolcano, Cascade volcanoes

Lahar deposit, western Cascades, Oregon

April 30, 2017/in Volcanic activity/by Marli Miller

RGO

Colonnade in basalt, Oregon

April 30, 2017/in Extrusive, Igneous Rocks, Volcanic activity/by Marli Miller

CRBG, columns, columnar, colonnade

Pumice Deposit

October 16, 2014/in Extrusive, Igneous, Igneous Rocks, Oregon, United States, Volcanic activity/by Marli Miller

RGO, pyroclastic