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Ordovician Period – limestone and liverwort

By | 2017-12-07T09:03:15+00:00 June 24th, 2017|Geology|

The Ordovician period saw the evolution of the octopus At the end of the Cambrian period, about 488 million years ago, most of the plants and animals living on Earth died, because of some catastrophe that we don't know much about. This catastrophe marks the beginning of the Ordovician period. Limestone formed Sea [...]

What happened in the Cambrian Period?

By | 2017-06-23T23:37:38+00:00 June 23rd, 2017|Geology|

Mossy rocks At the beginning of the Cambrian Period, about 542 million years ago, there were sea creatures like hydras, jellyfish, sponges and seaweed living in the oceans, but only one-celled algae on land yet. Small arthropods like beetles were beginning to appear, and by 540 million years ago the first land plants [...]