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.
I have cited this quotation because it shows that the concept of the universe which at least some physicists are now coming to accept is identical in its essential aspects with the one known to the learned elite in selected civilizations and cultures of high attainment in the ancient world.