The says that sedimentary rock layers are laid down parallel to the ground.
a. law of superposition
b. principle of uniformity
c. law of original horizontality
d. law of cross-cutting relationships

Aregion is an area of land that has common features. these features can be natural, such as climate or landscape. they can also be artificial, such as language or religion. the xinjiang uyghur autonomous region, above, is an area of china inhabited by uyghurs, a muslim group with ethnic ties to turkish people.

Answer (datum point);