The instructor will provide you with some fossil specimens to examine, For each specimen, make observations and determine the type of fossilization, and write them in the table below: Part II Again, stratigraphy is the branch of geology that focuses on the study of strata (layers af rock) in order Again, stratigraphy is the branch of geology that focuses on the study of strata (layers af rock) in order stratigraphy: The Principle of Original Morizontality: Sediments are generaily deposited in horizontal layers, and those that are not horizontal have gone through some type of deformation..