Late Jurassic Margin of Laurasia–A Record of Faulting Accommodating Plate Rotation

Jurassic (170–150 Ma) basins: The tracks of a continental-scale fault, the Mexico-Alaska megashear, from the Gulf of Mexico to Alaska
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Published:December 01, 2015
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CiteCitation
Thomas H. Anderson, 2015. "Jurassic (170–150 Ma) basins: The tracks of a continental-scale fault, the Mexico-Alaska megashear, from the Gulf of Mexico to Alaska", Late Jurassic Margin of Laurasia–A Record of Faulting Accommodating Plate Rotation, Thomas H. Anderson, Alexei N. Didenko, Cari L. Johnson, Alexander I. Khanchuk, James H. MacDonald, Jr.
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The Mojave-Sonora megashear, which bounded the Jurassic southwestern margin of the North America plate from 170 to 148 Ma, may be linked northward to Alaska via the previously recognized discontinuity between the Insular and Intermontane terranes and co-genetic regional elements such as transtensional basins, transpressional uplifts, and overlapping correlative magmatic belts. The longer, continental-scale fault thus defined, which is called the Mexico-Alaska megashear, separated the North America plate from a proto-Pacific plate (the Klamath plate) and linked the axis of ocean-floor spreading within the developing Gulf of Mexico with a restraining bend above which mafic rocks were obducted eastward onto...
- Alaska
- Arizona
- Atlantic Ocean
- Bajocian
- basins
- Blue Mountains
- British Columbia
- California
- Canada
- Coahuila Mexico
- continental crust
- Cook Inlet
- Cretaceous
- crust
- faults
- Great Valley Sequence
- Gulf of Mexico
- Jurassic
- Klamath Mountains
- magmatism
- Mesozoic
- Mexico
- Middle Jurassic
- Mojave-Sonora Megashear
- Nevada
- New Mexico
- North America
- North Atlantic
- Oxfordian
- San Andreas Fault
- sedimentary basins
- Sierra Nevada
- Sonora Mexico
- Talkeetna Mountains
- tectonics
- terranes
- United States
- Upper Jurassic
- volcanic belts
- Washington
- Western Canada
- Chihuahua Trough
- Chiricahua Mountains
- Relay Mountain Group
- Tyaughton Basin
- Little Hatchet Mountains
- Bisbee Basin
- East Potrillo Mountains
- Lummi Formation
- Talkeetna Fault
- Valle San Marcos
- Klamath Plate
- San Antonio Basin
- Sumdum Fault
- Kitkatla Fault
- Topawa Group
- Batamote Basin
- Mexico-Alaska Megashear
- La Mula Uplift
- Fidalgo Ophiolites
- Alexander-Wrangellia Terrane
- Mount Tallac Basin
- Chilchitna Fault
- Kahiltna Domain
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N35°00'00" - N42°00'00", W120°00'00" - W114°04'60" -
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