Geographer
Geosciences and Environmental Change Science Center
Email:
dvansistine@usgs.gov
Office Phone:
303-236-5452
Fax:
303-236-5349
ORCID:
0000-0003-1166-2547
Supervisor:
Donald S Sweetkind
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This data release contains new Earths gravity data from the Sopori Wash sub-basin in Pima and Santa Cruz Counties, Arizona. Data were acquired in January and March of 2017.
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At times during the past two million years, glaciers formed in the mountainous part of the Platte River drainage basin. These glaceriers were predominantly valley glaciers, also commonly referred to a s mountain or alpine glaciers. by definition, valley glaciers flow through pre-existing valleys and are bounded by exposed bedrock. the deep valleys and canyons of the map area already existed at the beginning of the Ice Age as a result of regional uplift and subsequent erosion that occured from late Oligocene through Pliocene time. the largest valley glacier in the map area was 45 km long and as much as 600 m thick. During times when Pleistocene glaciers reached their maximum extent, about 10 percent of the mountainous...
Categories: Data;
Tags: Bull Lake,
Climatology,
Colorado,
Geography,
Glaciation, All tags...
Glacier,
Glaciology,
Pinedale,
Pleistocene,
USGS Science Data Catalog (SDC),
United States, Fewer tags
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The northern half of the Lake Walcott 30 x 60 minute quadrangle shows the geology of the southern part of the Craters of the Moon lava field, the complex geologic features of the Holocene Kings Bowl and Wapi lava fields, and the southern part of the Great Rift volcanic rift zone. The long extent and distribution of skylights in lava-tube systems of the Horse Butte and Wapi Park lava fields are depicted on this map. 40Ar/39Ar and K/Ar age determinations give detail to the Holocene, late Pleistocene, and late middle Pleistocene volcanic for lava fields in this quadrangle. Most of the younger basalt eruptions (<150 ka) have occurred along the Great Rift volcanic rift zone, but two of the younger lava fields are located...
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The Geoheritage Sites of the Nation project has been established with the ultimate goal of developing a nationwide geoheritage GIS layer to accompany the 2D and 3D layers of the USGI. Through identification of the societal and educational values of significant geologic features, the USGS can provide relevant, inclusive, and accessible data for formal and informal educational opportunities at all levels to the broader public. By developing standardized selection criteria of geoheritage entities and a beta attribute schema, the Geoheritage Sites of the Nation Project hopes to seed the routine use of a methodology for the inclusion of geoheritage information into the USGI structured in ways that make USGS geologic...
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This 1:24,000-scale geologic map includes new geologic mapping as well as compilation and revision of previous geologic maps. Field investigations were conducted from 2009-2011, while also mapping and investigating the geology and hydrology of the Chickasaw National Recreation Area, west of the map area. The Fittstown quadrangle is in the northeastern part of the Arbuckle Mountains. The Arbuckle Mountains are composed of a thick sequence of Paleozoic sedimentary rocks that overlie Early Cambrian and Precambrian igneous rocks; these latter rocks are not exposed in the quadrangle. From middle to late Pennsylvanian time, the Arbuckle Mountains region was folded, faulted, and uplifted. Periods of erosion followed these...
Types: Citation;
Tags: Arbuckle Mountains,
Arbuckle-Simpson aquifer,
Fittstown,
Franks fault zone,
Franks graben, All tags...
Geologic map,
Geomorphology,
Groundwater,
Hunton anticline,
Johnston County,
Pontotoc,
Pontotoc County,
South-central Oklahoma,
USGS Science Data Catalog (SDC), Fewer tags
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