Exam 2: Formation of Soils From Parent Materials

Living organisms affect soil formation primarily by their constraining the level of oxygen in the soil.

The parent materials for most coastal plain soils are residual in nature.

Chemical weathering is accelerated by water,oxygen,and organic and inorganic acids moving down through the regolith.

The O horizons of a soil are dominantly organic horizons occurring above mineral horizons.

Secondary minerals are most prominent in the fraction of soils.

Which mineral is most resistant to weathering under humid temperate conditions?

Soils developed in wind-blown parent materials such as loess are generally of little agricultural value.

Igneous,sedimentary,and metamorphic are three _________.

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

Climate influences not only the rate of weathering but the type of native vegetation dominant in an area.

The element most often involved in oxidation reactions as minerals weather is _____.

A soil developed in transported parent materials will likely have properties related to the properties of the rock below the C horizon.

A soil developed in residual parent materials will likely have properties related to the properties of the rock below the C horizon.

Secondary minerals are recrystallized products of the chemical breakdown and/or alteration of primary minerals.