Start:

Graptolite, lowest occurrence of Monograptus uniformis.

Index Fossils:

Trilobites, Graptolites, Brachiopod and Conodont

Evolution:

Numerous fishes, other sharks, amphibians, lung fishes, seed plants, first trees, wingless insects

Geography:

Three major continental masses, warmer climate, erosion of mountains

Rocks:

Limestone, dolostone, shale and sandstone.