In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Hoffland studied how fungi tunnel along natural productivity gradients in types of this mineral. Prevalent in arkose, these framework silicates of aluminum react with water to form kaolinite. High-calcium rocks tend to be enriched in the K-variant and two variants of this mineral in one composition can form intergrowths and twin-wall intersections. Albite and labradorite are examples of a type of one of these that are depicted on the continuous branch of Bowen's reaction series moving from calcium-rich to sodium-rich. Sixty percent of Earth's crust is composed of, for 10 points, what type of mineral that includes plagioclase and orthoclase.
Science