From What Is Limestone Made?


Quick Answer

Limestone is a sedimentary rock that is at least 50 percent calcium carbonate, and is found in nature in the form of the mineral calcite. Calcium carbonate has the molecular formula CaCO3. The formation of limestone can occur either through evaporation or the accumulation of shells from dead organisms like oysters in a marine environment.

Continue Reading
Related Videos

Full Answer

Sedimentary rock refers to the fact that it is made up of sediment layers that are compacted. Limestone can be white or light-colored in appearance, and has a variable grain size.

There are different limestone types, including oolite, chalk and travertine. The difference among these limestone types is the conditions under which they were formed. For example, travertine forms through evaporation in cave environments. The uses of limestone include the fabrication of lime and cement through a heating process.

Learn more about Geology

Related Questions

  • Q:

    What Type of Rock Is Mica?

    A: Mica is a silicate mineral that can be found in nature as metamorphic or igneous rocks. Mica can also be found in sedimentary rocks depending on the types ... Full Answer >
    Filed Under:
  • Q:

    What Is Morganite?

    A: Morganite is a rare form of beryl found mainly in mineral deposits in Afghanistan, Brazil, California and Madagascar. Morganite is typically pink due to it... Full Answer >
    Filed Under:
  • Q:

    What Is Dolostone?

    A: A dolostone or dolomite rock is a former limestone wherein the calcite is replaced by dolomite, according to About.com. Geology.com states that this is a t... Full Answer >
    Filed Under:
  • Q:

    How Is Sandstone Formed?

    A: Sandstone forms over the course of centuries, as deposits of sand accumulate in rivers, lakes or on the ocean floor, and the sand blends with calcite or qu... Full Answer >
    Filed Under: