Introduction -- Physical properties of magma -- Intrusion of magma -- Forms of igneous bodies -- Cooling of igneous bodies and other diffusion processes -- Classification of igneous rocks -- ...

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 ...

Collectors of all ages have always been interested in rocks and the minerals that make them up. They come in countless shapes, sizes and colors. There are three main types of rocks: sedimentary, ...

What is the rock cycle? There are three types of rocks — igneous, sedimentary, and metamorphic — that have formed over time in the Earth's different layers. A rock can begin as one type and can change ...

A little knowledge of rocks and minerals will help you identify everything from jewelry to fossils. While reading this article may not turn you into a geologist, it should give you the basic ...

One way to understand the Earth’s crust is to begin long ago and far away: surveying eons of geological time, attending to ancient eruptions, and describing igneous, sedimentary and metamorphic rock.

NASA’s Perseverance rover discovered "Atoko Point," a light-colored boulder, on Mount Washburn within Mars’s Jezero Crater. The boulder, measuring 45 by 35 centimeters, is composed of pyroxene and ...

Dredged rock material in the Collection dates from the early part of the 1900s. The Collection has slowly evolved from individual bags of rock to thousands of wooden storage boxes full of rock, housed ...

Geologists recently dated the age of Watersmeet gneiss, a type of rock in the Upper Peninsula, as the oldest in the U.S. Here's what to know.