Susan Karl (Former Employee)
Science and Products
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Studies by the U.S. Geological Survey in Alaska, 2005 Studies by the U.S. Geological Survey in Alaska, 2005
Summary The collection of papers that follows continues the series of U.S. Geological Survey (USGS) investigative reports in Alaska under the broad umbrella of the geologic sciences. This series represents new and sometimes-preliminary findings that are of interest to Earth scientists in academia, government, and industry; to land and resource managers; and to the general public. The...
Authors
David W. Houseknecht, Kenneth J. Bird, Michelle L. Coombs, Christina A. Neal, Rick L. Wessels, Robert G. McGimsey, John F. Slack, W.C. Pat Shanks, Susan M. Karl, Pamela A. Gemery, Peter E. Bittenbender, W. Ian Ridley, W. Matthew Burns, Daniel O. Hayba, Elisabeth L. Rowan, Robert A. Ayuso, Peter J. Haeussler, Gregory A. Wandless, Anna Colvin
Constraints on the age and provenance of the Chugach accretionary complex from detrital zircons in the Sitka Graywacke near Sitka, Alaska Constraints on the age and provenance of the Chugach accretionary complex from detrital zircons in the Sitka Graywacke near Sitka, Alaska
The Sitka Graywacke is the westernmost and youngest unit of the Chugach accretionary complex in southeastern Alaska. Using laser-ablation inductively coupled plasma mass spectroscopy, we obtained 492 detrital-zircon ages on seven typical samples of Sitka Graywacke turbidites, which were collected in a transect across much of the unit near Sitka, Alaska. Individual grains range in age...
Authors
Peter J. Haeussler, George E. Gehrels, Susan M. Karl
Major- and trace-element concentrations in rock samples collected in 2004 from the Taylor Mountains 1:250,000-scale quadrangle, Alaska Major- and trace-element concentrations in rock samples collected in 2004 from the Taylor Mountains 1:250,000-scale quadrangle, Alaska
The Kuskokwim mineral belt of Bundtzen and Miller (1997) forms an important metallogenic region in southwestern Alaska that has yielded more than 3.22 million ounces of gold and 400,000 ounces of silver. Precious-metal and related deposits in this region associated with Late Cretaceous to early Tertiary igneous complexes extend into the Taylor Mountains 1:250,000-scale quadrangle. The U...
Authors
Edward P. Klimasauskas, Marti L. Miller, Dwight Bradley, Susan M. Karl, James F. Baichtal, Robert B. Blodgett
Ordovician "sphinctozoan" sponges from Prince of Wales Island, southeastern Alaska Ordovician "sphinctozoan" sponges from Prince of Wales Island, southeastern Alaska
A faunule of silicified hypercalcified "sphinctozoan" sponges has been recovered from a clast of Upper Ordovician limestone out of the Early Devonian Karheen Formation on Prince of Wales Island in southeastern Alaska. Included in the faunule are abundant examples of the new genus Girtyocoeliana, represented by Girtyocoeliana epiporata (Rigby and Potter), and Corymbospongia adnata Rigby...
Authors
J.K. Rigby, Susan M. Karl, R. B. Blodgett, J.F. Baichtal
Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska
Volcanogenic massive sulfide (VMS) deposits on Prince of Wales Island and vicinity in southeastern Alaska are associated with Late Proterozoic through Cambrian volcanosedimentary rocks of the Wales Group and with Ordovician through Early Silurian felsic volcanic rocks of the Moira Sound unit (new informal name). The massive sulfide deposits in the Wales Group include the Big Harbor...
Authors
Robert A. Ayuso, Susan M. Karl, John F. Slack, Peter J. Haeussler, Peter E. Bittenbender, Gregory A. Wandless, Anna Colvin
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No abstract available.
Authors
Richard W. Saltus, T. L. Hudson, Susan M. Karl, R. L. Morin
Science and Products
Filter Total Items: 22
No results found.
Filter Total Items: 64
Studies by the U.S. Geological Survey in Alaska, 2005 Studies by the U.S. Geological Survey in Alaska, 2005
Summary The collection of papers that follows continues the series of U.S. Geological Survey (USGS) investigative reports in Alaska under the broad umbrella of the geologic sciences. This series represents new and sometimes-preliminary findings that are of interest to Earth scientists in academia, government, and industry; to land and resource managers; and to the general public. The...
Authors
David W. Houseknecht, Kenneth J. Bird, Michelle L. Coombs, Christina A. Neal, Rick L. Wessels, Robert G. McGimsey, John F. Slack, W.C. Pat Shanks, Susan M. Karl, Pamela A. Gemery, Peter E. Bittenbender, W. Ian Ridley, W. Matthew Burns, Daniel O. Hayba, Elisabeth L. Rowan, Robert A. Ayuso, Peter J. Haeussler, Gregory A. Wandless, Anna Colvin
Constraints on the age and provenance of the Chugach accretionary complex from detrital zircons in the Sitka Graywacke near Sitka, Alaska Constraints on the age and provenance of the Chugach accretionary complex from detrital zircons in the Sitka Graywacke near Sitka, Alaska
The Sitka Graywacke is the westernmost and youngest unit of the Chugach accretionary complex in southeastern Alaska. Using laser-ablation inductively coupled plasma mass spectroscopy, we obtained 492 detrital-zircon ages on seven typical samples of Sitka Graywacke turbidites, which were collected in a transect across much of the unit near Sitka, Alaska. Individual grains range in age...
Authors
Peter J. Haeussler, George E. Gehrels, Susan M. Karl
Major- and trace-element concentrations in rock samples collected in 2004 from the Taylor Mountains 1:250,000-scale quadrangle, Alaska Major- and trace-element concentrations in rock samples collected in 2004 from the Taylor Mountains 1:250,000-scale quadrangle, Alaska
The Kuskokwim mineral belt of Bundtzen and Miller (1997) forms an important metallogenic region in southwestern Alaska that has yielded more than 3.22 million ounces of gold and 400,000 ounces of silver. Precious-metal and related deposits in this region associated with Late Cretaceous to early Tertiary igneous complexes extend into the Taylor Mountains 1:250,000-scale quadrangle. The U...
Authors
Edward P. Klimasauskas, Marti L. Miller, Dwight Bradley, Susan M. Karl, James F. Baichtal, Robert B. Blodgett
Ordovician "sphinctozoan" sponges from Prince of Wales Island, southeastern Alaska Ordovician "sphinctozoan" sponges from Prince of Wales Island, southeastern Alaska
A faunule of silicified hypercalcified "sphinctozoan" sponges has been recovered from a clast of Upper Ordovician limestone out of the Early Devonian Karheen Formation on Prince of Wales Island in southeastern Alaska. Included in the faunule are abundant examples of the new genus Girtyocoeliana, represented by Girtyocoeliana epiporata (Rigby and Potter), and Corymbospongia adnata Rigby...
Authors
J.K. Rigby, Susan M. Karl, R. B. Blodgett, J.F. Baichtal
Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska
Volcanogenic massive sulfide (VMS) deposits on Prince of Wales Island and vicinity in southeastern Alaska are associated with Late Proterozoic through Cambrian volcanosedimentary rocks of the Wales Group and with Ordovician through Early Silurian felsic volcanic rocks of the Moira Sound unit (new informal name). The massive sulfide deposits in the Wales Group include the Big Harbor...
Authors
Robert A. Ayuso, Susan M. Karl, John F. Slack, Peter J. Haeussler, Peter E. Bittenbender, Gregory A. Wandless, Anna Colvin
Reply Reply
No abstract available.
Authors
Richard W. Saltus, T. L. Hudson, Susan M. Karl, R. L. Morin
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