Champlain Thrust

Champlain Thrust
Champlain Thrust

Champlain Thrust Fault, Lone Rock Point, Burlington Vermont

The Champlain Thrust is a fault extending southward from southern Quebec, though western Vermont in the Champlain Valley, and into eastern New York in the Hudson Valley. This east dipping thrust fault transports Cambrian-Ordovician passive margin shelf rocks westerward by about 30–50 miles (48–80 km) and places them on top of Middle Ordovician rocks. The Middle Ordivician accretion of the one or more island arcs terranes drove the initial thrusting during the Taconic Orogeny, though reactivation of the fault may have occurred during the middle Devonian Acadian Orogeny[1].

The thrust fault is exposed to the north of the city of Burlington, Vermont on the shores of Lake Champlain at Lone Rock Point. Here the Lower Cambrian Dunham dolostone can be seen thrust on top of the Middle Ordovician Iberville shales.

The Champlain Thrust marks the most westerly thrust of the Taconic Orogeny.

References

  1. ^ Nicholas W. Hayman and W. S. F. Kidd., Reactivation of prethrusting, synconvergence normal faults as ramps within the Ordovician Champlain-Taconic thrust system., Geological Society of America Bulletin (April 2002), 114(4):476-489

External links


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Champlain thrust — The Champlain Thrust Fault extends southward from southern Quebec, though western Vermont (in the Champlain Valley), and into eastern New York (in the Hudson Valley). This east dipping thrust fault transports Cambrian Ordovician passive margin… …   Wikipedia

  • Vermont — This article is about the U.S. state of Vermont. For other uses, see Vermont (disambiguation). State of Vermont …   Wikipedia

  • Mount Philo State Park — U.S. National Register of Historic Places U.S. Historic District …   Wikipedia

  • United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …   Universalium

  • cañada — /keuhn yah deuh, yad euh/, n. Chiefly Western U.S. 1. a dry riverbed. 2. a small, deep canyon. [1840 50; < Sp, equiv. to cañ(a) CANE + ada n. suffix] * * * Canada Introduction Canada Background: A land of vast distances and rich natural resources …   Universalium

  • Canada — /kan euh deuh/, n. a nation in N North America: a member of the Commonwealth of Nations. 29,123,194; 3,690,410 sq. mi. (9,558,160 sq. km). Cap.: Ottawa. * * * Canada Introduction Canada Background: A land of vast distances and rich natural… …   Universalium

  • Western architecture — Introduction       history of Western architecture from prehistoric Mediterranean cultures to the present.       The history of Western architecture is marked by a series of new solutions to structural problems. During the period from the… …   Universalium

  • Plattsburgh Air Force Base — PAFB redirects here. For the military airport in Alaska with that ICAO code, see Ladd Army Airfield. For the civil use of this facility and airport information, see Plattsburgh International Airport. Plattsburgh Air Force Base …   Wikipedia

  • Appalachian Mountains — a mountain range in E North America, extending from S Quebec province to N Alabama. Highest peak, Mt. Mitchell, 6684 ft. (2037 m). Also called Appalachians. * * * Mountain system, eastern North America. The Appalachians, among the oldest… …   Universalium

  • North America — North American. the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 ft. (6187 m); lowest, Death Valley, 276 ft. (84 m) below sea level. 400,000,000 including… …   Universalium

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”