1. The Eras of Geologic Time
... may have been so great that little permanent crust could survive. Heat in the later Precambrian dissipated enough to allow the continental crust to form crustal rifting, volcanic activity, mountain building, and sedimentation dominated the latter Precambrian period. Creatures resembling worms and jellyfish have been discovered but there is poor representation of life in this period. Precambrian rocks ... washed over the interior, leaving sedimentary deposits to mark their own invasions. By late Paleozoic, continental collisions formed the super continent Pangaea and resulted in some of ...
- Word Count: 1841
- Approx Pages: 7
- Grade Level: Undergraduate