Cincinnatian Series - The layer of exposed bedrock in southwestern Ohio composed of rock from the Upper Ordovician period. Clastic Sedimentary Rock - Clastic sedimentary rocks are formed from the ...

About 34 million years ago, Earth began to cool dramatically, transforming the climate from greenhouse to icehouse and ...

She investigates the origin and evolution of the continental crust, the provenance of clastic sedimentary rocks, granite petrogenesis, and applies isotope geology and geochemistry to environmental ...

Let’s Find Out! The Snowball Earth event that occurred more than 700 million years ago might have led to a breakthrough.

Something scientists expected to find commemorating one of Earth’s most drastic periods of climate change apparently doesn’t ...

According to highly cited conventional models, cooling and a major drop in sea levels about 34 million years ago should have ...

What Was Happening on Earth at This Time The Precambrian is the earliest of the geologic ages, which are marked by different layers of sedimentary rock. Laid down over millions of years ...

This used to be sand and other sediment - that's why it is called sandstone - which is a type of sedimentary rock. Sedimentary rocks are formed when pieces of rock are eroded, or worn away ...

Minerals are typically formed when molten rock, or magma, cools, or by separating out of mineral-rich water, such as that in underground caverns. In general, mineral particles are small ...

A major drop in sea levels about 34 million years ago should have deposited gargantuan amounts of sandy material onto the ...

THE WEEK’S MOST POPULAR SONGS RANKED BY MAINSTREAM ROCK RADIO AIRPLAY DETECTIONS, AS MEASURED BY MEDIABASE AND PROVIDED BY LUMINATE. STATIONS ARE ELECTRONICALLY MONITORED 24 HOURS A DAY ...