GIS is based on at least two important areas of technology: A. gathering digital spatial data and printing maps.
B. hard drives and video cards.
C. gathering digital spatial data and creating digital maps.
D. creating digital maps and transforming digital maps.​

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.

In the diagram below dab and dac are adjacent angles

The covers all of earth like a thin shell,but it is not a solid sheet of material.it is broken up into several large sections and many smaller ones. fill in the blank.