Stratification, the layering that occurs in most sedimentary rocks and in those igneous rocks formed at the Earth's surface, as from lava flows and volcanic fragmental deposits. The layers range from several millimetres to many metres in thickness and vary greatly in shape.

What is an example of stratification?

Stratification means to sort data/people/objects into distinct groups or layers. For example, you might sort “All people in the USA” into ethnic groups, income level groups, or geographic groups.

What is social stratification in sociology?

Abstract. Social stratification refers to a ranking of people or groups of people within a society. But the term was defined by the earliest sociologists as something more than the almost universal inequalities that exist in all but the least complex of societies.