Laurentia

1,590 million years ago

also known as

North American Craton

banded iron formation

During the assembly of the core of Laurentia, banded iron formation was deposited in Michigan, Minnesota, and Labrador.

craton in

craton of

North American Plate

Greenland

Greenland is part of Laurentia. The island is separated from North America by the Nares Strait, but this is a Pleistocene erosional feature.

random

There is strong evidence that the observable universe is composed almost entirely of ordinary matter, as opposed to an equal mixture of matter and antimatter. This asymmetry of matter and antimatter in the visible universe is one of the great unsolved problems in physics.

tags

craton

tectonic structure

United States

In the United States, the [Laurentia] craton bedrock is covered with sedimentary rocks on the broad interior platform in the Midwest and Great Plains regions and is exposed only in northern Minnesota, Wisconsin, the New York Adirondacks, and the Upper Peninsula of Michigan.

Wikidata

https://www.wikidata.org/wiki/Q858071

Wikimedia

https://commons.wikimedia.org/wiki/Category:North_American_Craton

Wikipedia

Laurentia (Wikipedia) Laurentia or the North American craton is a large continental craton that forms the ancient geological core of North America. Many times in its past, Laurentia has been a separate continent, as it is now in the form of North America, although originally it also included the cratonic areas of Greenland and the Hebridean terrane in northwest Scotland. During other times in its past, Laurentia has been part of larger continents and supercontinents and consists of many smaller terranes assembled on a network of early Proterozoic orogenic belts. Small microcontinents and oceanic islands collided with and sutured onto the ever-growing Laurentia, and together formed the stable Precambrian craton seen today.