Tomkins and his team reconstructed an unusual rise in the number of meteorite impacts known as the Ordovician impact spike, ...

The rings are theorized to have formed 466 million years ago during one of the coldest periods in the planet's history, known ...

Impact craters found around the Earth that were made around the same time could be linked to debris falling from a ring, a new study suggests.

A recent study claims that Earth may have once had a ring. The theory would explain the presence of an odd density of impact craters around the equator dating back to the Ordovician period. A ring ...

Scientists have been trying to unravel what killed nearly all of Earth’s animals 400 million years ago. Could it be monstrous deformities caused by toxic metals in the ocean?

The "Big Five" mass extinctions of the Phanerozoic Eon have long attracted significant attention from the geoscience community and the public. Among them, the Late Ordovician Mass Extinction (LOME ...

Specifically, the findings support the hypothesis that supernovae could have triggered two of the so-called "big five" mass extinctions: those at the end of the Ordovician Period, some 445 million ...

There are several great nearby places to see geology for yourself, whether you're interested in collecting Late Ordovician fossils, exploring glacier-carved landscapes, or observing streams as they ...

How long did the Ordovician period last, and what caused the Ordovician mass extinction to wipe out 85 percent of life on earth 445 million years ago?

The fossilized time capsule from Castle Bank is from the middle of the Ordovician Period, about 462 million years ago.

Life in the Late Ordovician Four hundred and fifty (450) million years ago, during the Late Ordovician, most of Ohio was under water. At that time, the Oxford, Ohio area was part of a large inland sea ...