Although life had not yet invaded dry land or the air, the seas teemed with sponges, bryozoans, hydrozoans, brachiopods, gastropods, and, during the Atdabanain Age, the trilobites appeared.
The last epoch of this period was the Merioneth, followed by the Tremadoc, and its ages include the Tommotian and Menevian. Although life had not yet invaded dry land or the air, the seas teemed with sponges, bryozoans, hydrozoans, brachiopods, gastropods, and, during the Atdabanain Age, the trilobites appeared. Named in 1835 by the English geologist Adam Sedgwick for sedimentary rocks in Wales, what is this period occurring roughly 540 to 500 million years ago which, FTP, forms the first division of the Paleozoic Era?
The last epoch of this period was the Merioneth, followed by the Tremadoc, and its ages include the Tommotian and Menevian.
Cambrian