Yooperlites are a variety of sodalite-rich syenite found in the Upper Peninsula of Michigan.

Igneous rocks close igneous rock Igneous rocks are those which have been formed by the cooling and solidification ... Slate is dark grey/green in colour and can be split into thin layers for use ...

Visual inspection of the dark gray rock suggested that it was probably a fine-grained basaltic igneous rock formed by the crystallization of magma near the planet’s surface.

A single grain of rock lodged in a diamond contains a never-before-found mineral. And that newfound substance could reveal unusual chemical reactions unfolding in the depths of the mantle, the ...

In it the rocks are described as a number of families that have strict quantitative limits, the factors concerned being the ratio of the light-coloured and dark-coloured minerals present, the ...

As stated, rocks play an important role in our everyday lives, and understanding the rock cycle gives us a better understanding as to how we can use them for our benefit. The breakdown of rocks ...

The Hills and Valleys of Torquay: a study in Valley-Development and an Explanation Local Scenery. By A. J. Jukes-Browne. Pp. viii + 104. (Torquay: Published by the Author, Floriston, Torquay, 1907.) ...

Visual inspection of the dark gray rock suggested that it was probably a fine-grained basaltic igneous rock formed by the crystallization of magma near the planet's surface.

Shining diamonds speckle the dark, igneous rock that lines the pipe, and the diamonds themselves contain tiny bits of other minerals from hundreds of miles beneath Earth’s surface.

Shining diamonds speckle the dark, igneous rock that lines the pipe, and the diamonds themselves contain tiny bits of other minerals from hundreds of miles beneath Earth's surface.