| A well-known older astrobleme situated in the margin of the Mesoprotozoic Superior craton provides a good example of meteorite fall. |
| The three named genera of the family are apparently endemic to the southwestern North American craton. |
| The basin is separated from the craton by a major tectonic flexure known as the Redstone arch. |
| A large area of northern and central Canada is underlain by a huge craton, which forms the nucleus of the North American continent. |
| The Cimmerian islands, the present Turkey, Iran and Tibet, broke completely free of the Australian craton and moved rapidly to the north. |
| Much of the craton remained stable up to Triassic time, with sedimentary sequences dominated by shallow-water and subaerial sediments. |
