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Pluvial lake –Lake Abert, Oregon
A pluvial lake in Oregon’s Basin and Range, Lake Abert periodically dries and floods, leaving behind a playa covered with evaporite minerals. (140621-79)
Download ImagePumice fragments
Pumice fragments, erupted during the caldera-forming eruption of Mt. Mazama, Oregon. (140622-13)
Download ImageAsh flow tuff, Oregon
Roadcut of Ash flow tuff, erupted during the caldera-forming eruption of Mt. Mazama 7700 years ago, Oregon. (140703-104)
Download ImagePumice fragments
Pumice fragments, erupted during the caldera-forming eruption of Mt. Mazama, Oregon. (140622-14)
Download ImageAsh flow tuff, Oregon (pan)
Roadcut of Ash flow tuff, erupted during the caldera-forming eruption of Mt. Mazama 7700 years ago, Oregon. (140703-101)
Download ImagePlaya Lake and fault scarp, Oregon
Lake Abert in SE Oregon borders a normal fault that uplifts Abert Rim. The pluvial lake periodically dries to leave behind salt deposits. (140621-64)
Download ImagePillow basalt and palagonite
Pillow basalt and palagonite–outcrop is about 5 meters from bottom to top. The palagonite forms as a weathering product of basaltic glass as it reacts with water–typically while the pillows are forming as the lava pours into a lake. (140621-305)
Download ImagePluvial lake –Lake Abert, Oregon
A pluvial lake in Oregon’s Basin and Range, Lake Abert periodically dries and floods, leaving behind a playa covered with evaporite minerals. (140621-69)
Download ImagePluvial lake –Lake Abert, Oregon
A pluvial lake in Oregon’s Basin and Range, Lake Abert periodically dries and floods, leaving behind a playa covered with evaporite minerals. (140621-77)
Download ImagePrecipitation of ssalt, Oregon
Salt precipitating as water evaporates on playa. Lake Abert, a pluvial lake in SE Oregon.(140621-61)
Download ImagePluvial lake –Lake Abert, Oregon
A pluvial lake in Oregon’s Basin and Range, Lake Abert periodically dries and floods, leaving behind a playa covered with evaporite minerals. (140621-43)
Download ImagePlaya Lake and fault scarp, Oregon
Lake Abert in SE Oregon borders a normal fault that uplifts Abert Rim. The pluvial lake periodically dries to leave behind salt deposits. (140621-67)
Download ImagePluvial lake –Lake Abert, Oregon
A pluvial lake in Oregon’s Basin and Range, Lake Abert periodically dries and floods, leaving behind a playa covered with evaporite minerals. (140621-37)
Download ImageSalt deposits along edge of playa, OR
Salt deposits along edge of evaporating lake. Lake Abert, Oregon. (140621-55)
Download ImageMudcracks on dry lakebed, Lake Abert, Oregon.
Mudcracks on playa surface. Lake Abert, an ephemeral, pluvial lake in Oregon’s Basin and Range Province. Fault-bounded Abert Rim lies in the background. (140621-30)
Download ImagePluvial lake –Lake Abert, Oregon
A pluvial lake in Oregon’s Basin and Range, Lake Abert periodically dries and floods, leaving behind a playa covered with evaporite minerals. (140621-36)
Download ImagePillow basalt and palagonite, Oregon
Pillow basalt and palagonite–outcrop is about 1.5 meters from bottom to top. The palagonite forms as a weathering product of basaltic glass as it reacts with water–typically while the pillows are forming as the lava pours into a lake. (140621-306)
Download ImageMultnomah Falls and rainbow, Oregon (vertical)
Multnomah Falls and rainbow, Oregon. (140621-315)
Download ImagePillow basalt overlain by land-based flow, Oregon
Pillow basalt and palagonite overlain by lava flow. The palagonite forms as a weathering product of basaltic glass as it reacts with water–typically while the pillows are forming as the lava pours into a lake. The overlying land-based lava flow doesn’t contain pillows because it flowed over the lakebed after it filled . (140621-303)
Download ImageMudcracks on Lake Abert playa, Oregon
Mudcracks on evaporating lake bed –Lake Abert, a playa in southern Oregon. Surface is encrusted with evaporite minerals (140621-28)
Download Image
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