Which two observers would be experiencing the same apparent solar time (I need help asap)

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.

What does 2[tex] {2}^{ - 4} \times {2}^{ - 2} [/tex]

How can minerals crystallize from materials dissolved in water? check all that apply.