A geologist finds a layer of rock that is made of medium-grained sands and is porous.

What type of rock did the geologist find?

A.
sandstone**

B.
conglomerate

C.
coquina

D.
limestone

A: sandstone

I'd say Sandstone as well as Alie

To determine the type of rock that the geologist found, we need to understand the characteristics mentioned in the description.

Here are the characteristics provided:
1. The rock is made of medium-grained sands.
2. The rock is porous.

Based on these characteristics, the rock type that matches the description is sandstone.

Sandstone is a sedimentary rock that is formed from the consolidation and compaction of sand grains. It commonly contains medium-grained sands and has a porous nature, allowing fluids to flow through it.

Therefore, the correct answer is A. sandstone.