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Ordovician-age coquina, Ohio (vertical)
This fossiliferous limestone hash contains mostly Ordovician bryozoa, Cincinnati, Ohio. (110918-13)
Download Imagegranitic rock and inclusions, Oregon.
Strung-out xenoliths, probably by magmatic flow, of country rock in Cretaceous granite, Ashland, Oregon. (111117-10)
Download Imagegranitic rock and inclusions, Oregon.
Strung-out xenoliths, probably by magmatic flow, of country rock in Cretaceous granite, Ashland, Oregon. (111117-11)
Download ImagePetrified wood in volcanic tuff (vertical)
Petrified wood in volcanic tuff. (110918-5)
Download ImageClam fossils in sandstone, Oregon
Paleogene clam fossils in sandstone, Oregon. (110918-23)
Download ImageOrdovician coquina, Cincinnati, Ohio
This fossiliferous limestone hash contains mostly brachiopods, (110918-14c)
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Warner Valley Graben, Oregon
Wetlands in fault-bounded Warner Valley, a graben in southern Oregon. (110807-87)
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Flooded playa: Alvord Desert, Oregon
Note the mudcracks forming as the water evaporates. (110807-30)
Download ImageSandy beach and headland, Oregon
Washburn State Park, Oregon, a sandy beach along the Pacific Coast. (110910-6)
Download ImageFlooded playa: Alvord Desert, Oregon
Note the mudcracks forming as the water evaporates. (110807-26)
Download ImageSteens Mtn and Alvord Desert; Oregon
Steens Mountain; a tilted fault block or Oregon’s Basin and Range Province, rises above the Alvord Desert, a playa. (110807-45)
Download ImageFolded paleosols and basalt, Oregon
View of Oregon’s Painted Hills at John Day Fossil Beds National Monument. Gently folded paleosols of the Oligocene John Day Formation underlie flat-lying Picture Gorge Basalt, part of the Columbia River Basalt Group.(110805-96)
Download ImageColonnade in basalt, Oregon
Colonnade–columnar jointing– in Picture Gorge Basalt, of the Columbia River Basalt Group, Oregon (110806-17)
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Flooded Playa, Oregon (Pan)
Flooded Alvord Desert, a playa in Oregon’s Basin and Range. (110807-3)
Download ImageEocene Lahar deposits, Clarno Fm., Oregon
Eocene volcanic mudflow, or Lahar, deposits, are an important part of the Eocene Clarno Fm., in Oregon. These pinnacles are “the Palisades” of the Clarno Unit of John Day Fossil Beds National Monument. (110805-73)
Download ImageAngular unconformity, Oregon
Angular unconformity between tilted Oligocene John Day Fm and overlying subhorizontal lava flows of the Columbia River Basalt Group (Picture Gorge Basalt). (110805-90)
Download ImageColonnade in basalt, Oregon (vertical)
Colonnade–columnar jointing– in Picture Gorge Basalt, of the Columbia River Basalt Group, Oregon (110806-16)
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