Question

select the correct answer. unless a series of sedimentary rock layers has been overturned, which layer is usually the oldest? a. the layer on the top b. the layer with the most minerals c. the layer with the most fossils d. the layer on the bottom e. the igneous intrusion (dike)

Explanation:

In sedimentary rock - forming processes, new layers are deposited on top of older ones. Unless overturned, the bottom layer is the oldest. The amount of minerals or fossils doesn't determine the age of the layer. Igneous intrusions are younger than the surrounding sedimentary rocks they intrude into.

Answer:

D. the layer on the bottom