Exam 2: Formation of Soils From Parent Materials

The presence of iron in a mineral generally increases its resistance to chemical breakdown.

Which of the following is not a secondary mineral?

The mixed angular gravel, rock, and soil found at the foot of a slope is typical of what type of parent material?

Alluvial parent materials are those that have been laid down in former lake bottoms.

Igneous rocks are formed when molten magma cools and solidifies.

Eluviation of clay, iron, and other materials is the principal process responsible for the formation of an E horizon.

Hydrolysis involves the splitting of water into its H⁺ and OH^- components while hydration attaches intact water molecules to a compound.

Secondary minerals are most prominent in the fraction of soils.

Marine sediments are typical parent materials in coastal plain areas.

The A horizons are more apt to be cultivated than the E horizons.

Organic matter accumulation is most pronounced in the ____.

Mechanical weathering processes result in:

"Biotite-->clay-->iron oxide" represents a ________.