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 layers. So, unless overturned, the bottom layer is the oldest.

Answer:

D. the layer on the bottom