allitic crust
geology
Quick Summary
The term "allitic" describes a geological substance that is low in silica but rich in aluminum and iron compounds. This type of material is a component of duricrusts, which are hardened accumulations found at or near the Earth's surface. Duricrusts are formed from silica, alumina, and iron oxide, though other substances can be present. Allitic crusts specifically yield commercial bauxite. These crusts are the result of weathering, denudation, and soil formation processes, often occurring in tropical and subtropical regions.12
Summary created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.