Fly to “Toroweap Formation, Grand Canyon” to explore this fo…

Fly to “Toroweap Formation, Grand Canyon” to explore this formation. This formation includes three rock types (represented in the stratigraphic column as three “members”). Click the name of the placemark to see four images. The first rock sample image is of a medium-grained clastic rock. The second is a gray, carbonate rock which fizzes when in contact with acid. The third is a chemical rock that is soft enough to scratch with a fingernail. What are the 3 rock types that make up the Toroweap formation? Mark all that apply.

There is an unconformity that separates the Moenkopi and the…

There is an unconformity that separates the Moenkopi and the Chinle formations (see image below). What kind of unconformity is it?Tip: Utilize the principles of superposition and original horizontality to help you. Look at the orientation of the layers below the line and consider the depositional environment of the Chinle fm

The image below illustrates the stratigraphic column of the…

The image below illustrates the stratigraphic column of the western interior during the Cambrian period (~540-480 Mya). How did the landscape change over the time period recorded in this sequence?Note: The Bright Angel Fm is shale; the Supramuav is limestone; Tapeats is a medium-grained, thin-bedded sandstone. The numbers represent thickness-you can ignore them.