What FACTS ABOUT ROCKS do you know? They are abundant on earth, and yet little is known about them. These facts will increase your knowledge of the rocks.

An igneous rock has come to be regarded, more constantly than before, not merely as a mineral-aggregate, but as-the product of consolidation of a molten rock-magma; and consideration has been ...

Igneous rocks observed in thin sections can be classified into three types of volcanic facies (Figure 4): effusive, intrusive, and extrusive rock. Effusive facies represents magma that has erupted ...

For instance, if a forester identifies soil derived from metasedimentary quartzite at one site and igneous extrusive soil at another, different management strategies should be tailored for each. The ...