Question

Unless a series of sedimentary rock layers has been overturned, which layer is usually the oldest?

the layer on the top
the layer with the most minerals
the layer with the most fossils
the layer on the bottom
the igneous intrusion (dike)

Answer 1

I know its really really late but I just took the test and someone might come across this while looking for answers and the correct answer is the layer on the bottom

Step-by-step explanation:

Answer 2

The answer is the layer on the bottom. Sedimentary rock is made by the deposition of sediments at the bottom of water bodies such as oceans and seas. As newer soil deposits are brought in by inland inlets, they settle down on the previous older sediments. The sediments are continually brought in until they are huge enough in amount to cause immense pressure on the underlying layers and hence cause them to form into rock.