2.2" Thamnopora SP Coral Fossil Coral Reef Devonian Age Verde Valley, Arizona

Location: Martin Formation, Verde Valley, Arizona, United States

Weight: 1.5 Ounces  

Dimensions: 2.2 Inches Long, 1.3 Inches Wide, 1.1 Inches Thick 

Devonian Age 380 Million Years Old

The item pictured is the one you will receive.

Thamnopora SP Fossil Coral

Corals reappeared during the Devonian period, around 410 million years ago, when they first began forming extensive reef systems. These early reefs were made up of stromatoporoids (reef-building sponges), tabulate corals (forming mounds, branches, and organ-like shapes), rugose corals (horn-shaped), and the ancestors of modern coralline algae (encrusting, colorful algae on rocks).

By the end of the Devonian, scleractinian, or “stony,” corals—the type that now dominates today’s reefs—emerged. Yet, approximately 350 million years ago, corals disappeared from the fossil record. Although the exact cause is uncertain, evidence points to rapid sea-level changes and a sudden drop in atmospheric carbon dioxide as likely factors.