William F. Cannon
William (Bill) Cannon is a Scientist Emeritus with the USGS Geology, Energy & Minerals (GEM) Science Center in Reston, VA.
Science and Products
Filter Total Items: 15
Filter Total Items: 107
Impact of wildfire on levels of mercury in forested watershed systems: Voyageurs National Park, Minnesota Impact of wildfire on levels of mercury in forested watershed systems: Voyageurs National Park, Minnesota
Atmospheric deposition of mercury to remote lakes in mid-continental and eastern North America has increased approximately threefold since the mid-1800s (Swain and others, 1992; Fitzgerald and others, 1998; Engstrom and others, 2007). As a result, concerns for human and wildlife health related to mercury contamination have become widespread. Despite an apparent recent decline in...
Authors
Laurel G. Woodruff, Mark B. Sandheinrich, Mark E. Brigham, William F. Cannon
Extraterrestrial demise of banded iron formations 1.85 billion years ago Extraterrestrial demise of banded iron formations 1.85 billion years ago
In the Lake Superior region of North America, deposition of most banded iron formations (BIFs) ended abruptly 1.85 Ga ago, coincident with the oceanic impact of the giant Sudbury extraterrestrial bolide. We propose a new model in which this impact produced global mixing of shallow oxic and deep anoxic waters of the Paleoproterozoic ocean, creating a suboxic redox state for deep seawater...
Authors
J. F. Slack, W.F. Cannon
Soil geochemical signature of urbanization and industrialization – Chicago, Illinois, USA Soil geochemical signature of urbanization and industrialization – Chicago, Illinois, USA
The concentrations of 45 elements in ambient (not obviously disturbed) surface soils were determined for 57 sites distributed throughout the city of Chicago, Illinois in the upper Midwestern United States. These concentrations were compared to soils from 105 sites from a largely agricultural region within a 500-km radius surrounding the city and to soils collected from 90 sites across...
Authors
W.F. Cannon, John D. Horton
Continental-scale patterns in soil geochemistry and mineralogy: results from two transects across the United States and Canada Continental-scale patterns in soil geochemistry and mineralogy: results from two transects across the United States and Canada
In 2004, the US Geological Survey (USGS) and the Geological Survey of Canada (GSC) initiated a pilot study that involved collection of more than 1500 soil samples from 221 sites along two continental transects across Canada and the United States. The pilot study was designed to test and refine protocols for a soil geochemical survey of North America. The two transects crossed a wide...
Authors
L. G. Woodruff, W.F. Cannon, D. D. Eberl, D. B. Smith, J.E. Kilburn, J.D. Horton, R. G. Garrett, R.A. Klassen
Pilot studies for the North American Soil Geochemical Landscapes Project - Site selection, sampling protocols, analytical methods, and quality control protocols Pilot studies for the North American Soil Geochemical Landscapes Project - Site selection, sampling protocols, analytical methods, and quality control protocols
In 2004, the US Geological Survey (USGS) and the Geological Survey of Canada sampled and chemically analyzed soils along two transects across Canada and the USA in preparation for a planned soil geochemical survey of North America. This effort was a pilot study to test and refine sampling protocols, analytical methods, quality control protocols, and field logistics for the continental...
Authors
D. B. Smith, L. G. Woodruff, R. M. O’Leary, W.F. Cannon, R. G. Garrett, J.E. Kilburn, M. B. Goldhaber
The Gogebic Iron Range — A sample of the northern margin of the Penokean fold and thrust belt The Gogebic Iron Range — A sample of the northern margin of the Penokean fold and thrust belt
The Gogebic iron range is an elongate belt of Paleoproterozoic strata extending from the west shore of Lake Gogebic in the upper peninsula of Michigan for about 125 km westward into northern Wisconsin. It is one of six major informally named iron ranges in the Lake Superior region and produced about 325 million tons of direct-shipping ore between 1887 and 1967. A significant resource of
Authors
William F. Cannon, Gene L. LaBerge, John S. Klasner, Klaus J. Schulz
Science and Products
Filter Total Items: 15
Filter Total Items: 107
Impact of wildfire on levels of mercury in forested watershed systems: Voyageurs National Park, Minnesota Impact of wildfire on levels of mercury in forested watershed systems: Voyageurs National Park, Minnesota
Atmospheric deposition of mercury to remote lakes in mid-continental and eastern North America has increased approximately threefold since the mid-1800s (Swain and others, 1992; Fitzgerald and others, 1998; Engstrom and others, 2007). As a result, concerns for human and wildlife health related to mercury contamination have become widespread. Despite an apparent recent decline in...
Authors
Laurel G. Woodruff, Mark B. Sandheinrich, Mark E. Brigham, William F. Cannon
Extraterrestrial demise of banded iron formations 1.85 billion years ago Extraterrestrial demise of banded iron formations 1.85 billion years ago
In the Lake Superior region of North America, deposition of most banded iron formations (BIFs) ended abruptly 1.85 Ga ago, coincident with the oceanic impact of the giant Sudbury extraterrestrial bolide. We propose a new model in which this impact produced global mixing of shallow oxic and deep anoxic waters of the Paleoproterozoic ocean, creating a suboxic redox state for deep seawater...
Authors
J. F. Slack, W.F. Cannon
Soil geochemical signature of urbanization and industrialization – Chicago, Illinois, USA Soil geochemical signature of urbanization and industrialization – Chicago, Illinois, USA
The concentrations of 45 elements in ambient (not obviously disturbed) surface soils were determined for 57 sites distributed throughout the city of Chicago, Illinois in the upper Midwestern United States. These concentrations were compared to soils from 105 sites from a largely agricultural region within a 500-km radius surrounding the city and to soils collected from 90 sites across...
Authors
W.F. Cannon, John D. Horton
Continental-scale patterns in soil geochemistry and mineralogy: results from two transects across the United States and Canada Continental-scale patterns in soil geochemistry and mineralogy: results from two transects across the United States and Canada
In 2004, the US Geological Survey (USGS) and the Geological Survey of Canada (GSC) initiated a pilot study that involved collection of more than 1500 soil samples from 221 sites along two continental transects across Canada and the United States. The pilot study was designed to test and refine protocols for a soil geochemical survey of North America. The two transects crossed a wide...
Authors
L. G. Woodruff, W.F. Cannon, D. D. Eberl, D. B. Smith, J.E. Kilburn, J.D. Horton, R. G. Garrett, R.A. Klassen
Pilot studies for the North American Soil Geochemical Landscapes Project - Site selection, sampling protocols, analytical methods, and quality control protocols Pilot studies for the North American Soil Geochemical Landscapes Project - Site selection, sampling protocols, analytical methods, and quality control protocols
In 2004, the US Geological Survey (USGS) and the Geological Survey of Canada sampled and chemically analyzed soils along two transects across Canada and the USA in preparation for a planned soil geochemical survey of North America. This effort was a pilot study to test and refine sampling protocols, analytical methods, quality control protocols, and field logistics for the continental...
Authors
D. B. Smith, L. G. Woodruff, R. M. O’Leary, W.F. Cannon, R. G. Garrett, J.E. Kilburn, M. B. Goldhaber
The Gogebic Iron Range — A sample of the northern margin of the Penokean fold and thrust belt The Gogebic Iron Range — A sample of the northern margin of the Penokean fold and thrust belt
The Gogebic iron range is an elongate belt of Paleoproterozoic strata extending from the west shore of Lake Gogebic in the upper peninsula of Michigan for about 125 km westward into northern Wisconsin. It is one of six major informally named iron ranges in the Lake Superior region and produced about 325 million tons of direct-shipping ore between 1887 and 1967. A significant resource of
Authors
William F. Cannon, Gene L. LaBerge, John S. Klasner, Klaus J. Schulz