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
Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30' X 60' quadrangles, Wisconsin, and Michigan Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30' X 60' quadrangles, Wisconsin, and Michigan
No abstract available.
Authors
W.F. Cannon, L. G. Woodruff, S. W. Nicholson, C. A. Hedgman, R. Barber-Delach
Potential for new nickel-copper sulfide deposits in the Lake Superior region Potential for new nickel-copper sulfide deposits in the Lake Superior region
Scientists from the U.S. Geological Survey are evaluating the potential for undiscovered sulfide deposits containing varying amounts of nickel, copper, platinum-group metals, and cobalt in the Lake Superior region as part of an ongoing effort to assess the mineral potential of the United States. Similarities between rocks of the Midcontinent rift and rocks that host the Voisey Bay nickel...
Authors
Klaus J. Schulz, William F. Cannon
Digital geologic map and mineral deposits of the Lake Superior region: Minnesota, Wisconsin, Michigan Digital geologic map and mineral deposits of the Lake Superior region: Minnesota, Wisconsin, Michigan
No abstract available.
Authors
W.F. Cannon, T. H. Kress, D. M. Sutphin, G. B. Morey, Joyce Meints
U-Th-Pb zircon ages of some Keweenawan Supergroup rocks from the south shore of Lake Superior U-Th-Pb zircon ages of some Keweenawan Supergroup rocks from the south shore of Lake Superior
New single-crystal zircon U–Th–Pb ages for plutonic and rhyolitic Keweenawan Supergroup rocks from the south shore of Lake Superior provide geochronological constraints on magmatic evolution associated with the 1.1 Ga Midcontinent rift. Analyses of a granophyric phase of the Mineral Lake intrusion and the Mellen granite, both parts of the Mellen Intrusive Complex, and a laterally...
Authors
R. E. Zartman, S. W. Nicholson, W.F. Cannon, G. B. Morey
Closing of the Midcontinent-Rift - a far-field effect on Grenvillian compression Closing of the Midcontinent-Rift - a far-field effect on Grenvillian compression
The Midcontinent rift formed in the Laurentian supercontinent between 1109 and 1094 Ma. Soon after rifting, stresses changed from extensional to compressional, and the central graben of the rift was partly inverted by thrusting on original extensional faults. Thrusting culminated at about 1060 Ma but may have begun as early as 1080 Ma. On the southwest-trending arm of the rift, the crust...
Authors
W.F. Cannon
Crustal-scale thrusting and origin of the Montreal River monocline-A 35-km-thick cross section of the midcontinent rift in northern Michigan and Wisconsin Crustal-scale thrusting and origin of the Montreal River monocline-A 35-km-thick cross section of the midcontinent rift in northern Michigan and Wisconsin
A structurally simple, 35-km-thick, north facing stratigraphic succession of Late Archean to Middle Proterozoic rocks is exposed near the Montreal River, which forms the border between northern Wisconsin and Michigan. This structure, the Montreal River monocline, is composed of steeply dipping to vertical sedimentary rocks and flood basalts of the Keweenawan Supergroup (Middle...
Authors
W.F. Cannon, Z. E. Peterman, P.K. Sims
Science and Products
Filter Total Items: 15
Filter Total Items: 107
Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30' X 60' quadrangles, Wisconsin, and Michigan Digital bedrock geologic map of the Ashland and northern part of the Ironwood 30' X 60' quadrangles, Wisconsin, and Michigan
No abstract available.
Authors
W.F. Cannon, L. G. Woodruff, S. W. Nicholson, C. A. Hedgman, R. Barber-Delach
Potential for new nickel-copper sulfide deposits in the Lake Superior region Potential for new nickel-copper sulfide deposits in the Lake Superior region
Scientists from the U.S. Geological Survey are evaluating the potential for undiscovered sulfide deposits containing varying amounts of nickel, copper, platinum-group metals, and cobalt in the Lake Superior region as part of an ongoing effort to assess the mineral potential of the United States. Similarities between rocks of the Midcontinent rift and rocks that host the Voisey Bay nickel...
Authors
Klaus J. Schulz, William F. Cannon
Digital geologic map and mineral deposits of the Lake Superior region: Minnesota, Wisconsin, Michigan Digital geologic map and mineral deposits of the Lake Superior region: Minnesota, Wisconsin, Michigan
No abstract available.
Authors
W.F. Cannon, T. H. Kress, D. M. Sutphin, G. B. Morey, Joyce Meints
U-Th-Pb zircon ages of some Keweenawan Supergroup rocks from the south shore of Lake Superior U-Th-Pb zircon ages of some Keweenawan Supergroup rocks from the south shore of Lake Superior
New single-crystal zircon U–Th–Pb ages for plutonic and rhyolitic Keweenawan Supergroup rocks from the south shore of Lake Superior provide geochronological constraints on magmatic evolution associated with the 1.1 Ga Midcontinent rift. Analyses of a granophyric phase of the Mineral Lake intrusion and the Mellen granite, both parts of the Mellen Intrusive Complex, and a laterally...
Authors
R. E. Zartman, S. W. Nicholson, W.F. Cannon, G. B. Morey
Closing of the Midcontinent-Rift - a far-field effect on Grenvillian compression Closing of the Midcontinent-Rift - a far-field effect on Grenvillian compression
The Midcontinent rift formed in the Laurentian supercontinent between 1109 and 1094 Ma. Soon after rifting, stresses changed from extensional to compressional, and the central graben of the rift was partly inverted by thrusting on original extensional faults. Thrusting culminated at about 1060 Ma but may have begun as early as 1080 Ma. On the southwest-trending arm of the rift, the crust...
Authors
W.F. Cannon
Crustal-scale thrusting and origin of the Montreal River monocline-A 35-km-thick cross section of the midcontinent rift in northern Michigan and Wisconsin Crustal-scale thrusting and origin of the Montreal River monocline-A 35-km-thick cross section of the midcontinent rift in northern Michigan and Wisconsin
A structurally simple, 35-km-thick, north facing stratigraphic succession of Late Archean to Middle Proterozoic rocks is exposed near the Montreal River, which forms the border between northern Wisconsin and Michigan. This structure, the Montreal River monocline, is composed of steeply dipping to vertical sedimentary rocks and flood basalts of the Keweenawan Supergroup (Middle...
Authors
W.F. Cannon, Z. E. Peterman, P.K. Sims