More Info about the Cambrian
Panotia, the supercontinent that formed at the end of the Precambrian Era, approximately 600 million
years ago, had already begun to break apart by the beginning of the Paleozoic Era. A new ocean, the Iapetus
Ocean, widened between the ancient continents of Laurentia (North America), Baltica (Northern Europe), and
Siberia. Gondwana, the supercontinent that was assembled during the Pan-African orogeny, was the largest
continent at this time, stretching from the Equator to the South Pole.
During the Ordovician Period, warm water deposits, such as limestones and salt, were found in the equatorial
regions of Gondwana (Australia, India, China, and Antarctica), while glacial deposits and ice-rafted debris occurred
in the south polar areas of Gondwana (Africa and South America).