Antler orogeny

Antler orogeny

The Antler orogeny is a mountain-building episode that is named for Antler Peak, at Battle Mountain, Nevada. The orogeny extensively deformed Paleozoic rocks of the Great Basin in Nevada and western Utah during Late Devonian and Early Mississippian time. In the late Devonian, the Antler volcanic island arc terrane collided with was then the west coast of North America in the vicinity of today's border between Utah and Nevada. The collision zone is today signified by the geological alignment called the Carlin Unconformity (or Carlin Trend), an area enriched in various ores including gold. It is also represented by the Roberts Mountains Thrust. It is broadly contemporary with the Acadian orogeny of eastern North America.

The Antler orogeny was first defined by the American geologist Ralph J. Roberts. [Roberts, R.J. 1949. Geology of the Antler Peak quadrangle, Nevada. US Geological Survey Open File Report. 108 p.] [Roberts, R.J. 1951. Geology of the Antler Peak quadrangle, Nevada. USGS Geologic Quadrangle Map GQ-10] It was, however, originally described in terms of the old geology of geosynclines, before the acceptance of what is now known as plate tectonics including the concept of terranes.

References

* [http://jan.ucc.nau.edu/~rcb7/Text_WUS.html Geologic history of Western US] : with maps
* [http://www.geology.ewu.edu/mccollum/ANTLEROROGENICREGION.htm Linda B. McCollum and Michael B. McCollum, "Research within the Antler and Sonoma Orogens, Northwestern Nevada, 1983-1993"]
*"Dictionary of Geological Terms", 3rd. Edition,1984, Robert L. Bates and Julia A. Jackson, Eds., prepared by The American Geological Institute


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