As it cools it becomes a very hard type of igneous rock. This one first formed over 350 million years ago. Then, millions of years after that, during the last ice age - when the land was covered ...

Scientists believe Bear Butte was formed around 65 million yea rs ago ... but the harder volcanic (igneous) rock remains, forming Bear Butte. Bear Butte rises 1,253 feet about the surrounding ...

Find out more about available formats and browse any associated online resources. All Earth Science students need to understand the origins, environments, and basic processes that produce igneous and ...

In 1931, the Lafayette meteorite was rediscovered in a drawer at Purdue University. Since then, it has become a focus for ...