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rocks

A New Look at Apollo Samples Supports Ancient Impact Theory

May 24, 2012

Want to stay on top of all the space news? Follow @universetoday on Twitter New investigations of lunar samples collected during the Apollo missions have revealed origins from beyond the Earth-Moon system, supporting a hypothesis of ancient cataclysmic bombardment for both worlds. Remove this ad

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Were Martian Rocks Weathered by Water?

October 4, 2011

There are many ways rocks can be textured. Wind erosion, water erosion, the escape of volcanic gases during their formation (in the case of igneous rocks)… all these forces can create the pitted textures found on many rocks on Earth… and perhaps even on Mars. And according to a report published by a group of [...]

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What Is The Rock Cycle

September 22, 2010

The answer to ‘what is the rock cycle’ is very straight forward: it is a geological concept that describes the transitions among the three main types of rock: sedimentary, metamorphic, and igneous. Each type of rock is altered or destroyed when it is forced out of equilibrium. The water cycle and plate tectonics are the [...]

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How Are Rocks Formed?

December 3, 2009

You’ve come to find an answer to the question, “How are rocks formed?”. However, there are three types of rocks: igneous, sedimentary, and metamorphic rocks. Each type of rock has a different origin. Therefore, the question, “How are rocks formed?” begs three distinct answers. Here they are: How are igneous rocks formed? Igneous rocks are [...]

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What is the Earth’s Mantle Made Of?

September 14, 2009

The Earth’s mantle is a region of the planet that starts below the crust, and ends at the core. It accounts for the largest portion of the Earth’s volume, but what is the Earth’s mantle made of? The Earth’s mantle is about 2,970 km thick, making up about 84% of the Earth’s total volume. You [...]

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