2. The relatively archaic animals of the Cambrian seafloor were replaced in the Late Cambrian and Ordovician by a great diversity of different fauna consisting of corals, brachiopods, cephalopods, ...

Some of our area's unique geological features and the processes that occurred to form them are: The fossil content of local limestone shows the diversity of life in the late Ordovician period.

This era of intense bombardment, known as the Ordovician impact spike, may have resulted from meteorites falling from the ring rather than flying in from space, which would explain the strange ...

A huge 75-foot-tall square boulder deep in Wyoming’s Bighorn Mountains has been baffling people since it was discovered.

Series: The Critical Moments and Perspectives in Earth History and Paleobiology Your institution does not have access to this book on JSTOR. Try searching on JSTOR ...

1. Silurian survivors of the Late Ordovician mass extinction were mostly cold-adapted animals from high latitudes or deep waters. 3. Silurian brachiopods included pentamerids (teardrop-shaped shells) ...

Brachiopoda ("lamp shells") - Brachiopoda (or "lamp-shells ... Cincinnatian Series - The layer of exposed bedrock in southwestern Ohio composed of rock from the Upper Ordovician period. Clastic ...

Learn more about the time period that took place 488 to 443 million years ago. 3 min read During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the ...

In the past 500 million years on Earth, there have been five mass extinctions. Here are a few incredible species that managed ...

The Ordovician world was a watery one in which ... But in the Cabrières Biota, you’ll find brachiopods, trilobites, bivalved arthropods, worms, cnidarians, and mollusks. The fossilized loot ...

Simple, single-celled algae would have made enough oxygen via photosynthesis to sustain trilobites, clamlike brachiopods, worms ... All of that extra oxygen likely contributed to the Great Ordovician ...