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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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East Africa
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Kenya (1)
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Tanzania (1)
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East African Lakes
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Far East
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fossils
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Invertebrata
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Primary terms
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absolute age (16)
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Africa
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East Africa
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Kenya (1)
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Tanzania (1)
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East African Lakes
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Lake Tanganyika (1)
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North Africa (1)
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Asia
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Far East
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carbon
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Pleistocene
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upper Pleistocene
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upper Quaternary (1)
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Tertiary
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Challis Volcanics (1)
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John Day Formation (1)
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middle Tertiary
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Soda Lake Shale Member (1)
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Neogene
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Miocene
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Barstow Formation (2)
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lower Miocene
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Aquitanian (1)
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middle Miocene (1)
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upper Miocene (3)
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Pliocene
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lower Pliocene (1)
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Paleogene
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Eocene
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Absaroka Supergroup (1)
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Lake Gosiute (1)
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Hanna Formation (1)
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Oligocene
-
upper Oligocene
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Chattian (1)
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-
-
Paleocene (1)
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-
Vaqueros Formation (1)
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-
-
Central America (1)
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Chordata
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Vertebrata
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Tetrapoda
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Amphibia
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Labyrinthodontia (1)
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Mammalia
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Theria
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Eutheria
-
Perissodactyla (1)
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-
-
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Reptilia
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Synapsida
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Therapsida
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Dicynodontia
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Lystrosaurus (1)
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climate change (6)
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Big Soda Lake
Exceptionally fast growth rate of <100-yr-old tufa, Big Soda Lake, Nevada: Implications for using tufa as a paleoclimate proxy
Figure 1. Map of Big and Little Soda Lakes showing location of modern and i...
Figure 2. Elevation of tufa mounds in relation to historic water-level reco...
Field photographs of volcanic centers of the western Nevada volcanic field....
Paleoecology of an Exceptionally Preserved Arthropod Fauna from Lake Deposits of the Miocene Barstow Formation, Southern California, U.S.A
Dedication to mentors and colleagues
Russell Fault: Early Strike-Slip Fault of California Coast Ranges
RECENT CHEMICAL ANALYSES OF WATERS FROM SEVERAL CLOSED-BASIN LAKES AND THEIR TRIBUTARIES IN THE WESTERN UNITED STATES
—Looking south at Temblor Range (near left), Carrizo Plain with Soda Lake, ...
The Vigor, Futility, and Application of Microbial Element Cycles in Alkaline Soda Lakes
Fourth Annual Field Conference, Inter-Mountain Association of Petroleum Geologists: GEOLOGICAL NOTES
Distinct mantle sources for Pliocene–Quaternary volcanism beneath the modern Sierra Nevada and adjacent Great Basin, northern California and western Nevada, USA
Map of southwestern North America showing locations of Proterozoic province...
Geomorphic and sedimentologic evidence for pluvial Lake Carrizo, San Luis Obispo County, California
ABSTRACT The Carrizo Plain, the only closed basin in California’s Southern Coast Ranges, preserves landforms and deposits that record both climate change and tectonic activity. An extensive system of clay dunes documents the elevations of late Pleistocene and Holocene pans. Clay dune elevations, drowned shorelines, eroded anticlinal ridges, and zones of perturbed soil chemistry provide evidence of two lake levels higher than today’s (currently 581 m above sea level [masl]), one at ~591 masl at ca. 20 ka and another at ~585 masl that existed at ca. 10 ka, based on optically stimulated luminescence (OSL) dates on clay dune sediment. Two cores from the abandoned floor of the lake provide additional evidence of a long-lived lake in the Carrizo Plain during the late Pleistocene. The longer of the two cores (~42 m) was sampled for palynology, environmental magnetism, and scanning electron microscope–petrography. The magnetic susceptibility signal contains two notable features corresponding to sedimentary materials consistent with reducing conditions. The higher of these features occurs near the surface, and the lower occurs at ~18 m depth. A 14 C date on charcoal from the upper reduced zone places the top of this zone at no older than 22.6–20.9 cal ka. This date is consistent with the OSL date on geomorphic features associated with a highstand above ~591 masl. Assuming that reducing conditions correspond to at least a few meters’ depth of relatively fresh water, the new 14 C date suggests that the upper reduced zone represents a marine isotope stage (MIS) 2 pluvial maximum lake in the Carrizo Plain. Pollen and ostracodes from the reduced sediments indicate a wetter and cooler climate than today. These conditions would have been capable of sustaining a lake with water much less saline than that of the modern lake. The timing of the oldest documented highstand (no later than 20 ka) is consistent with a modified jet stream migration model and is not consistent with a tropical incursion model. Northeast-to-southwest asymmetry across the lake floor may be consistent with southwestward tilting driven by Coast Range shortening normal to the San Andreas fault, as is seen throughout the region.
The blast, the quake, and the bomb: A guide to high-energy events in western Nevada, USA
ABSTRACT This guide presents an eight-hour, in-person tour of intersecting geologic and human history in western Nevada, USA. A 25 megaton phreatomagmatic blast created a mile-wide (1.6-km-wide) maar, now filled by Soda Lake. The magnitude 7 Dixie Valley earthquake ripped along more than 45 km of the Stillwater Range front in 1954. The 12 kiloton Shoal nuclear test in 1963 created a 50-m-wide cavity in solid granite.