3.2" Colonial Rugose Coral Fossil Devonian Age Speed Quarry, Clark County, Indiana Leptomeryx They first appeared around 521

They first appeared around 521 million years ago during the Early Cambrian period at the start of the Atdabanian stage

Significance: Early complex life forms

This leaf dates from a critical period in Earth’s history

Certain characteristics show that the protocetids were adapting to aquatic life including lack of fusion of the pelvic vertebrae (allowing tail movement) and nostrils that have moved halfway up their snout

3.2" Colonial Rugose Coral Fossil Devonian Age Speed Quarry, Clark County, Indiana Leptomeryx They first appeared around 521Location: Speed Quarry, Clark County, Indiana Weight: 4. 3 Ounces Dimensions: 3. 2 Inches Long, 3. 2 Inches Wide, 1. 7 Inches Thick Middle Devonian Age 380 Million Years Old The item pictured is the one you will receive. Colonial Rugose Fossil Coral (Prismatophyllum Prisma) Dare to own a relic from one of nature's boldest experiments in reef formation. During the Devonian period410 million years agocorals entered the oceans with remarkable force,