Crater Lake caldera, Oregon
Cascades
Mount St. Helens, Washington
Cascade Range stratovolcanoes
Pyroclastics of 3.5Ka Minoan eruption, Santorini
tephra, students
Columnar-jointed basalt, Oregon
lava, dwshed, columns, columnar, colonnade
Cinder cone and flow, California
volcanic, igneous, Cascade volcanoes
Ash Flow tuff, Crater Lake, (vertical)
differential erosion, volcanic, pyroclastic, weathering, RGO, Cascade volcanoes
Pyroclastic rock, Oregon Cascades
Cascade volcanoes
Vitrophyre in welded tuff, SE California
pyroclastic, volcanic
Colonnade in basalt, Oregon
CRBG, columns, columnar, colonnade
Pumice Deposit
RGO, pyroclastic
Volcanic Rock Samples
Collected samples of volcanic rock named from left to right: rhyolite, andesite, basalt. (Image ID# ig-851)
Volcanic Rock Samples
hand specimens