ISBN: | 978-5-5121-7766-2 |
High Quality Content by WIKIPEDIA articles! Stratigraphy, a branch of geology, studies rock layers and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks. Stratigraphy includes two related subfields: lithologic stratigraphy or lithostratigraphy and, biologic stratigraphy or biostratigraphy.