Question

question 7
2 pts
while in the field one day, you notice a stratigraphic sequence of three sedimentary rocks. the lowest unit is a coarse - grained sandstone, which is overlain by a sandy siltstone. the highest unit is a shale. which of the following interpretations is most likely correct?
the stratigraphic sequence indicates progressive deepening of the sedimentary basin over time.
the stratigraphic sequence indicates progressive shallowing of the sedimentary basin over time.
the stratigraphic sequence indicates sedimentary filling of the basin without any change in water depth.
question 8
2 pts
which of the following is required during metamorphism to produce foliation?
differential stress
metasomatism
melting
confining pressure

Explanation:

For Question 7: Coarse - grained sandstone forms in shallower water, and shale forms in deeper water. A transition from sandstone to siltstone to shale suggests deepening of the sedimentary basin.
For Question 8: Differential stress causes minerals to align, resulting in foliation during metamorphism. Metasomatism is chemical change, melting is transformation to a liquid state, and confining pressure does not produce foliation specifically.

Answer:

Question 7: The stratigraphic sequence indicates progressive deepening of the sedimentary basin over time.
Question 8: differential stress