| 词条 | Transcontinental Arch |
| 释义 |
The Transcontinental Arch refers to the islands of North America which extended from New Mexico to Minnesota and the Great Lakes region. [1] These islands were present during the Sauk sequence, the earliest cratonic sequence. As a result of the Sauk sequence, epeiric seas covered most of North America, leaving only the craton of the Canadian Shield and the Transcontinental Arch islands exposed. References1. ^Wicander, Reed. "Historical Geology." 18 Apr. 2017. {{US-geologic-formation-stub}} 1 : Cambrian United States |
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