When standing in a stream bed, you observe identical layers of sedimentary strata on both sides of the bed. Which came first, the sedimentary rocks, or the stream? Explain your reasoning, including what principle you are using.

Ba population changes in response to a change in environment

Build a market-oriented economy;

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.