Students are given 4 hypothetical stratigraphic columns (each roughly 30 m thick) of deltaic deposits, 3 base maps with section locations, and a map scale. Students subdivide the stratigraphic units into subfacies and interpret subenvironments (delta plain, delta front, prodelta, marine) and describe/list features used to make these interpretations. Using depositional interpretations, 3 bentonite marker beds, and paleocurrent information, students draw 3 successive paleogeographic maps of the region showing delta migration through time.