In soil science, parent material is the underlying geological material (generally bedrock or a superficial or drift deposit) in which soil horizons form. Soils typically inherit a great deal of structure and minerals from their parent material, and, as such, are often classified based upon their contents of consolidated or unconsolidated mineral material that has undergone some degree of physical or chemical weathering and the mode by which the materials were most recently transported.
Read more about Parent Material: Consolidated, Unconsolidated, Climate and Weathering
Famous quotes containing the words parent and/or material:
“The children [on TV] are too well behaved and are reasonable beyond their years. All the children pop in with exceptional insights. On many of the shows the childrens insights are apt to be unexpectedly philosophical. The lesson seems to be, Listen to little children carefully and you will learn great truths.”
—G. Weinberg. originally quoted in What Is Televisions World of the Single Parent Doing to Your Family? TV Guide (August 1970)
“A second-class mind dealing with third-class material is hardly a necessity of life.”
—Harold Laski (18931950)