n. The study of rock layers and the layering process (stratification).
n. the layering of deposits, with newer remains overlaying older ones, forming a chronology of the site.
the GNU version of the Collaborative International Dictionary of English
n. That branch of geology which treats of the arrangement and succession of strata.
The Century Dictionary and Cyclopedia
n. In geology, order and position of the stratified groups; all that part of geological science which is not specially theoretical or paleontological; general descriptive geology.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the branch of geology that studies the arrangement and succession of strata
Word Usage
"The technical name for these layers is strata, and the careful study of them is called stratigraphy."