Read the following descriptions of rocks and layers, and identify the likelihood of each being a good aquifer by grouping them into high and low likelihoods.
LOW:
Granite (igneous rock) with very few to no cracks
Gneiss (metamorphic rock that used to be granite and underwent intense pressure)HIGH:
Unconsolidated gravel and sand
Conglomerate (sedimentary rock composed of various sizes of sediment such as pebbles and sand grains)
Sandstone (sedimentary rock composed of sand grains)