There are three main types of rock: igneous rock, metamorphic rock, and sedimentary rock. Almost all fossils are preserved in sedimentary rock. Organisms that live in topographically low places (such ...

NASA’s Perseverance rover recently captured a stunning image of a black-and-white striped rock on Mars, sparking excitement ...

A Clarion County-based company has received the go-ahead to construct an underground limestone mine in Deemston. The state Department of Environmental Protection on Jan. 21 approved a permit for ...

These layers of sedimentary rock were deposited in Cambrian time, when another shallow sea covered this region. Among the fossilized remains found within these layers are brachiopods, trilobites ...

The basalt which makes up the Giant’s causeway is an igneous rock. Sedimentary rocks are formed by small rock pieces which are transported by rivers and laid down in layers. Chalk is a ...

It turns out the answers are in Earth's rocks. Even the Greeks and Romans realized that layers of sediment in rock signified old age. But it wasn't until the late 1700s -- when Scottish geologist ...

"The fact that so many places are missing the sedimentary rocks from this time period has been one of the most puzzling features of the rock record," said C. Brenhin Keller, an assistant professor ...

With the cooperation of adjacent property owners, crews from Butte County accessed the bifurcation and confirmed a ...