Which of the following are the erosion map affects of a glacier found in the mountains?
a. pieces of rock are removed through a process called arête.
b. valley glaciers widen u- shaped stream valleys into v-shaped glacial valleys
c. with glaciers on three or more sides of a mountaintop, a steep peak called a horn is formed.
d. all of the above

Why did large numbers of african migrate to the americas

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.

Use complete sentences to describe scientists’ predictions for another earthquake in the same location. if applicable, provide an anticipated date of reoccurrence.