The Midcontinent Rift System (MRS) or Keweenawan Rift is a 2,000 km (1,200 mi) long geological rift in the center of the North American continent and...

Midcontinent Rift System began to extend along a 2,000 kilometres (1,200 mi) path, across both the Canadian Shield and the Stable Platform. The rift failed...

and incorporated into continental crust. Aulacogens such as the Midcontinent Rift System of North America are also viable sources of rocks which may undergo...

Yukon and Alaska The West Antarctic Rift System in Antarctica The Midcontinent Rift System, a late Precambrian rift in central North America The Midland...

began to split apart to form the Midcontinent Rift System, also called the Keweenawan Rift. Lava flows created by the rift in the Lake Superior area were...

continental rift zone in Northwestern Ontario, Canada, centered on Lake Nipigon. It represents an aulacogen of the much larger Midcontinent Rift System, which...

is a supergroup of volcanic and sedimentary rocks that fill the Midcontinent Rift System in the U.S. states of Michigan, Wisconsin, and Minnesota. It is...

to folded regions such as some mountain chains of Eurasia. The Midcontinent Rift System in North America is marked by a series of horsts extending from...

Nipigon diabase sills give evidence of rift-related continental basaltic magmatism during the Midcontinent Rift System event, estimated at 1,109 Ma ago. Thick...

waters. Over 1,100 mya, a rift formed and lava emerged from cracks along the edges of the rift valley. This Midcontinent Rift System extended from the lower...

of the triple junction (centered beneath Lake Superior) in the Midcontinent Rift System event, estimated at 1.1 billion years ago. Thunder Bay is a large...

are intrusive rocks formed about 1.1 billion years ago during the Midcontinent Rift; these adjoin and are interspersed with the extrusive rocks of the...

Humboldt Fault zone. It is also associated with the Proterozoic Midcontinent Rift System, which extends into northern Kansas about fifty miles west of the...

volcanic in origin, having been deposited by volcanism of the Midcontinent Rift System. Volcanism of Canada Volcanism of Eastern Canada Hart, Thomas R;...

of the Midcontinent Rift System onto sedimentary rocks of the Jacobsville Sandstone. The fault is part of the inversion of the Midcontinent Rift where...

Hibernia Oil Field is located.[citation needed] The Stenian period Midcontinent Rift System that is still visible at the surface in the area of Lake Superior...

Ordovician meteor event. Buried deeply within Iowa's bedrock, the Midcontinent Rift System can be seen clearly in magnetic anomaly maps of Iowa. This is a...

features are situated in the Southern Province, including the Midcontinent Rift System and the Sudbury Igneous Complex. Geology of Ontario Geology of...

and deepest rifts and valleys in various worlds of the Solar System. List of Solar System extremes List of largest craters in the Solar System List of tallest...

during a period of magmatic activity associated with the large Midcontinent Rift System about 1,100 million years ago. McKay is traditionally known as...

agates formed within the basaltic lava flows left behind from the Midcontinent Rift about 1.1 billion years ago. They are not named after the lake, but...

Marathon. It is thought to have formed by the Midcontinent Rift System, a 2,000 km (1,243 mi) long rift in the centre of the North American continent...

Valley (Arizona), U.S. Eastern North America Rift Basins, Canada and the U.S. Midcontinent Rift System, Canada and the U.S. Salton Trough, Mexico and...

began to split apart to form the Midcontinent Rift System, also called the Keweenawan Rift. Lava flows created by the rift in the Lake Superior area were...

of 25 km (16 mi). The Coldwell Complex has its origins in the Midcontinent Rift System about 1,100 million years ago. It is an exposed magma chamber that...

older than tholeiitic basalts and rhyolites of Middle Proterozoic Midcontinent Rift System. Age of 1370 ±20 Ma for samples from Spavinaw Creek outcrop in:...

volcanic pile. The Keweenaw Peninsula and Isle Royale, formed by the Midcontinent Rift System, are the only sites in the United States with evidence of prehistoric...

is made up of ancient lava bedrock related to volcanism of the Midcontinent Rift System and is heavily forested, with over 20 inland lakes. It has a rugged...

it was felt as far away as Dubuque, Iowa. Extensional tectonics Midcontinent Rift System Nemaha Ridge from the Kansas Geological Survey (at the University...

south of the Great Lakes tectonic zone in Minnesota, south of the Midcontinent Rift System in Wisconsin and in the Upper Peninsula of Michigan.: 1  Crystalline...