OBJECTIVE FORESTRY

Detailed explanation-1: -There are two main magma types that carry natural diamonds to the surface. These magmas crystallize on cooling into volcanic rocks known as kimberlite and lamproite (see box A). Kimberlite is by far the dominant type of eruption to bring diamonds to Earth’s surface (figure 1).

Detailed explanation-2: -Unlike most of the surface rocks in Kansas, which are sedimentary in origin, kimberlite is an igneous rock, formed from the cooling of molten magma. Igneous rocks are extremely rare in Kansas.

Detailed explanation-3: -Diamond is only formed at high pressures. It is found in kimberlite, an ultrabasic volcanic rock formed very deep in the Earth’s crust. The extreme pressures needed to form diamonds are only reached at depths greater than 150km.

Detailed explanation-4: -Kimberlite is an igneous rock that major source of diamonds. Kimberlite is a variety of peridotite. It is rich in mica minerals content and often in form of crystals of phlogopite.