Choose the option that puts the rock and sediment types in order from most porous to least porous.
A) shale, sand and gravel, silt and clay
B) silt and clay, metamorphic rocks, volcanic rocks
C) sand and gravel, limestone, shale
D) plutonic rocks, limestone, sand and gravel
Question 2
Which type of aquifer is most common in the United States?
A) sand and gravel
B) igneous and metamorphic rock
C) sandstone
D) limestone
