Geologists have long struggled to understand massive time gaps in Earth’s rock record, where millions—sometimes billions—of ...

Igneous intrusions are a type of rock feature. They form when molten rock cools below the surface of the Earth. Join Isla and Connor as they explore igneous rock landscape features at Traprain Law ...

Rising north of Butte, east of Deer Lodge, south of Highway 12 between Helena and Garrison Junction, and west of the ...

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 ...