Questions: 1. Describe the geography of western North America during the Late Triassic based on the evidence discussed in the paper. Include things like coastlines and the location of active and extinct volcanic centers. 2. What does the paper show about sediment transportation? 3. Where did rivers flow from and to where? 4. What formations were deposited by these rivers (be specific)? 5. What was the composition of sediments transported from these areas, and what kind of source rocks were therefore present? 6. Aside from zircon age using U-Pb dating, what other information was used to determine the source of zircons?