This discipline of Earth Science is devoted to the order and relative position of rock strata, and their relationships to the geologic time scale and Earth history.

What principle of stratigraphy does the image display?

Here, we see a sequence of sedimentary rock strata. Using which stratigraphic principle, how do we know that these layers have yet to be subjected to geologic processes of deformation?

In this image, we see two rock towers that appear to express the same sequences of sediments. Using the ________, young geologists can infer that these separated layers were once joined as one larger layer.

Using the Principle of Cross-Cutting Relationships, a young geologist like yourself can infer that the darker layer of vertical rock is ________ than the lighter, more massive rocks behind it.

Here, relative ages of sedimentary rock strata are extrapolated using assemblages of fossils that are expressed in individual layers. What principle of stratigraphy is used to make these inferences?

Using your newfound skills involving the principles of stratigraphy, order the geologic sequence of events from oldest to youngest using the associated letter codes (e.g. C → A → B → E → D).

Lithostratigraphy, biostratigraphy, and chronostratigraphy are three related subfields of stratigraphy.

This Catholic priest and scientist established three principles relating to sedimentary rock strata during the 17th-century giving rise to the modern field of stratigraphy.

Average American consumers can thank the work of geologists studying the stratigraphy of sediments in finding this popular commodity.