GeologyRocks

The earliest defined geological period spanning 542-483Ma. Time before the Cambrian is referred to as the Pre-Cambrian, making the Cambrian the first period of the Palaeozoic Era. All fossils from this period are marine and the beginning of this period saw the Cambrian Explosion; an apparent burst of evolution.

The Cambrian is split into four Epochs, Lower Series, Series 2, Series 3 and Furongian.