Ineed (again! ) what does an unconformity in a sequence of rock layers reveal about geologic history?

the layers must cover hundreds of square miles.

a layer of rock might have eroded.

a rock layer must have turned upside down.

the layers must have been deposited very quickly.

Which of the following statements best explains the relationship between medicines and concerns about the shrinking of the amazon rainforest?

Sandstones that form in aeolian (wind/desert) environments appear very different from other sandstones, such as those formed in a beach/ shoreline environment and in rivers on land. give three identifying properties for each of the three sandstones that would tell a geologist which depositional environment they formed in. consider things such as the relationship between transportation and grain size, shape, roundness, sorting, fossils and composition.

The meseta in spain is a a. navigable river b. castle c. coastal plain d.plateau