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This digital database is the product of collaboration between the U.S. Geological Survey, the Alfred Wegener Institute for Polar and Marine Research Potsdam, Foothill College GeoSpatial Technology Certificate Program, and the Geophysical Institute at the University of Alaska. The primary goal for creating this digital database is to enhance current estimates of organic carbon stored in deep permafrost, in particular Late Pleistocene syngenetic ice-rich loess permafrost deposits, called Yedoma. This deposit is vulnerable to thermokarst and erosion due to natural and anthropogenic disturbances. The original paper maps were issued by the Department of Natural Resources of the Russian Federation or its predecessor the...
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Abstract Data Fifty-three types of surficial geologic deposits and residual materials of Quaternary age are described in a pamphlet and located on a map of the greater Pueblo area, in part of the Front Range, in the Wet and Sangre de Cristo Mountains, and on the plains east of Colorado Springs and Pueblo. Deposits formed by landslides, wind, and glaciers, as well as colluvium, residuum, alluvium, and others are described in terms of predominant grain size, mineral or rock composition (e.g., gypsiferous, calcareous, granitic, andesitic), thickness, and other physical characteristics. Origins and ages of the deposits and geologic hazards related to them are noted. Many lines drawn between units on our map were placed...
Categories: Web Site; Tags: expansive clay, bedrock, Lincoln County, till, soil, All tags...
The Halfway House site in interior Alaska is arguably the most studied loess deposit in northwestern North America. The site contains a complex paleomagnetic and paleoenvironmental record, but has lacked the robust chronologic control that would allow its full potential to be exploited. Detailed reexamination of stratigraphy, paleomagnetics and tephrostratigraphy reveals a relatively complete marine isotope stage (MIS) 6 to Holocene record constrained by the Old Crow (124 ± 10 ka), VT (106 ± 10 ka), Sheep Creek-Klondike (ca. 80 ka), Dominion Creek (77 ± 8 ka) and Dawson (ca. 30.2 cal ka BP) tephras. We show two well-developed paleosols formed during Marine Isotope Stages (MIS) 5e and 5a, while MIS 5c and 5b are...
The Halfway House site in interior Alaska is arguably the most studied loess deposit in northwestern North America. The site contains a complex paleomagnetic and paleoenvironmental record, but has lacked the robust chronologic control that would allow its full potential to be exploited. Detailed reexamination of stratigraphy, paleomagnetics and tephrostratigraphy reveals a relatively complete marine isotope stage (MIS) 6 to Holocene record constrained by the Old Crow (124 ± 10 ka), VT (106 ± 10 ka), Sheep Creek-Klondike (ca. 80 ka), Dominion Creek (77 ± 8 ka) and Dawson (ca. 30.2 cal ka BP) tephras. We show two well-developed paleosols formed during Marine Isotope Stages (MIS) 5e and 5a, while MIS 5c and 5b are...
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The surficial geologic map of the Eastern and Central United Statesdepicts the areal distribution of surficial geologic deposits and othermaterials that accumulated or formed during the past 2+ million years,the period that includes all activities of the human species. Thesematerials are at the surface of the earth. They make up the "ground"on which we walk, the "dirt" in which we dig foundations, and the �soil�in which we grow crops. Most of our human activity is related in oneway or another to these surface materials that are referred tocollectively by many geologists as regolith, the mantle of fragmentaland generally unconsolidated material that overlies the bedrockfoundation of the continent. The map is based...
Tags: Lake Erie quadrangle, West Virginia, Grus, Till, Marl, All tags...
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Thirty-nine types of surficial geologic deposits and residualmaterials of Quaternary age are described and mapped in the greaterDenver area, in part of the Front Range, and in the piedmont andplains east of Denver, Boulder, and Castle Rock. Descriptionsappear in the pamphlet that accompanies the map. Landslidedeposits, colluvium, residuum, alluvium, and other deposits ormaterials are described in terms of predominant grain size, mineralor rock composition (e.g., gypsiferous, calcareous, granitic,andesitic), thickness of deposits, and other physicalcharacteristics. Origins and ages of the deposits and geologichazards related to them are noted. Many lines between geologicunits on our map were placed by generalizing...
Tags: gravel, Watkins, 08031 = Denver, 08049 = Grand, 08059 = Jefferson, All tags...
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This map illustrates extents and types of unconsolidated deposits and bedrock in the Big Delta A-4 Quadrangle, Alaska. This map is based on field observations begun by P?w? in 1949 and by Reger in 1976. Unit characteristics and extents were determined during field visits and by interpreting 1:40,000-scale black-and-white aerial photographs taken in August 1949 and 1:63,360-scale, false-color infrared aerial photographs taken in July 1978, August 1980, and August 1981.
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During 2009, the Alaska Division of Geological & Geophysical Surveys continued a program, begun in 2006, of reconnaissance mapping of surficial geology in the proposed natural-gas pipeline corridor through the upper Tanana River valley. The study area is a 12-mi-wide (19.3-km-wide) area that straddles the Alaska Highway from the western boundaries of the Tanacross B-3 and A-3 quadrangles near Tetlin Junction eastward to the eastern boundaries of the Nabesna D-1 and C-1 quadrangles along the Canada border. Mapping during 2008-2009 in the Tanacross and Nabesna quadrangles linked with the mapping completed in the Tanacross, Big Delta and Mt. Hayes quadrangles in 2006-2008. Surficial geology was initially mapped in...
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This data set contains surficial geologic units in the Eastern and CentralUnited States, as well as a glacial limit line showing the position ofmaximum glacial advance during various geologic time periods. Thegeologic units represent surficial deposits and other surface materialsthat accumulated or formed during the past 2+ million years, such assoils, alluvium, and glacial deposits. These surface materials arereferred to collectively by many geologists as regolith, the mantle offragmented and generally unconsolidated material that overlies the bedrockfoundation of a continent.This data set and the printed map produced from it, U.S. Geological Survey(USGS) Geologic Investigation Series I-2789, were based on 31 publishedmaps...
Tags: Missouri, Mississippi, Mobile quadrangle, Connecticut, Allegheny Plateau, All tags...
The shrub-steppe area near Shaartuz, Tadzhik, S.S.R., is shown to be a net accumulator of dust despite being an occasional source of dust. For the accumulation of the dust to form the observed surface crust, a net deposition of about 290–490 g m−2 yr−1 of particles smaller than 20 μm is required, depending on the duration of the deposition period. The particles smaller than 20 μm are mixed with particles brought up from the sandy material below the surface crust by bioturbation and are incorporated into the surface crust. Measurements during the 16 and 20 September 1989 dust storms provided a total deposition of 41.1 g m−2 of particles smaller than 20 μm. Because 10–30 dust storms...
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Fifty-three types of surficial geologic deposits and residual materials of Quaternary age are described in a pamphlet and located on a map of the greater Pueblo area, in part of the Front Range, in the Wet and Sangre de Cristo Mountains, and on the plains east of Colorado Springs and Pueblo. Deposits formed by landslides, wind, and glaciers, as well as colluvium, residuum, alluvium, and others are described in terms of predominant grain size, mineral or rock composition (e.g., gypsiferous, calcareous, granitic, andesitic), thickness, and other physical characteristics. Origins and ages of the deposits and geologic hazards related to them are noted. Many lines drawn between units on our map were placed by generalizing...
Tags: gravel, 08049 = Grand, Florissant, 08025 = Crowley, San Luis Valley, All tags...


map background search result map search result map Generalized Surficial Geologic Map of the Pueblo 1� x 2� Quadrangle, Colorado Surficial Deposits and Materials in the Eastern and Central UnitedStates (East of 102 Degrees West Longitude) Engineering-geologic map of the Alaska Highway corridor, Tetlin Junction to Canada border, Alaska Surficial geology of the Dalton Highway (Itkillik-Sagavanirktok rivers) area, southern Arctic foothills, Alaska Geologic map of the Big Delta A-4 Quadrangle, Alaska Surficial deposits and materials in the eastern and central UnitedStates (east of 102 degrees west longitude) Generalized Surficial Geologic Map of the Denver 1�x2� Quadrangle, Colorado Geologic map of the Saint Joseph area, Missouri and Kansas Generalized Surficial Geologic Map of the Pueblo 1� x 2� Quadrangle, Colorado Digital Database and Maps of Quaternary Deposits in East and Central Siberia Geologic map of the Big Delta A-4 Quadrangle, Alaska Geologic map of the Saint Joseph area, Missouri and Kansas Surficial geology of the Dalton Highway (Itkillik-Sagavanirktok rivers) area, southern Arctic foothills, Alaska Generalized Surficial Geologic Map of the Pueblo 1� x 2� Quadrangle, Colorado Generalized Surficial Geologic Map of the Denver 1�x2� Quadrangle, Colorado Generalized Surficial Geologic Map of the Pueblo 1� x 2� Quadrangle, Colorado Engineering-geologic map of the Alaska Highway corridor, Tetlin Junction to Canada border, Alaska Surficial Deposits and Materials in the Eastern and Central UnitedStates (East of 102 Degrees West Longitude) Surficial deposits and materials in the eastern and central UnitedStates (east of 102 degrees west longitude) Digital Database and Maps of Quaternary Deposits in East and Central Siberia