The lower boundary for this period's system is defined by a stratotype section on the Burin peninsula in Newfoundland.
The lower boundary for this period's system is defined by a stratotype section on the Burin peninsula in Newfoundland. Sea levels rose significantly during this period, as evidenced by certain limestone deposits from the period exposed along the Yangtze River. After the recent breakup of the supercontinent Pannotia, major landmasses included Baltica, Laurentia, and Gondwona, though no land plants existed. The fossil record from the period is dominated by trilobites, and the general acceleration of biotic diversity during it is known as its eponymous "explosion." FTP name this first geologic period of both the Phanerozoic Eon and Paleozoic Era, which was followed by the Ordovician.
The lower boundary for this period's system is defined by a stratotype section on the Burin peninsula in Newfoundland.
Cambrian Period