Sedimentary rocks are made up of pieces of older rocks (igneous, metamorphic, and sedimentary) and organic remains (shells, bone, etc.). When rocks break apart from erosion they are transported by ...

Pumice is an example of extrusive igneous rock. The word extrusive means that the magma was forced onto the earth's surface and cooled in a matter of hours. Granite is an example of intrusive igneous ...

THE magnetization of dated igneous rocks has been much used for the study of the directions of the geomagnetic field in remote geological periods. This method is based on the supposition that igneous ...

In my last column, I wrote about the locations where you can find igneous rocks that were formed from lava. The metarhyolite and metabasalt described in the column are known as extrusive rocks, those ...

We often talk about climate change, melting glaciers, or strange landforms. But we rarely think about something that’s always around us– rocks. They don’t make the news, but they’re everywhere. We ...

(1) THE appearance of a revised edition of Hatch and Wells's “Petrology of the Igneous Rocks” is a matter of interest to British petrologists, since this has long been a standard text-book in British ...

SIOUX CITY (KTIV) - Gather your supplies! In this episode we will use everyday materials to create a model of the rock cycle and explore the three different categories of rock. Sedimentary rocks are ...