2007-03-21 15:10:57 · 4 answers · asked by peter_blanch 1 in Science & Mathematics ➔ Earth Sciences & Geology
The best are unconsolidated or poorly consolidated coarse clastic sediments underlain and overlain by formations with low permeability. In other words, loose sand and gravel with layers of clay above and below it.
2007-03-21 16:18:58 · answer #1 · answered by Now and Then Comes a Thought 6 · 0⤊ 0⤋
Some aquifers are composed of porous layers of sediments, like sand and gravel. Rocks with large pores, like sandstone, and highly fractured rock, like limestone may be aquifers. A good aquifer needs to have its pores and fractures connected.
2007-03-21 22:50:49 · answer #2 · answered by chocolategirl 2 · 0⤊ 0⤋
Very loosly cemented gravel formation with a good avenue to get quick recharge would make a wealthy aquifer.Still more to be best would be if the formation is"sandwiched" or "nestled"below and above with impermeable rock or clayey layer.
2007-03-22 01:02:57 · answer #3 · answered by anusen1970 2 · 0⤊ 0⤋
Permeable rocks like sandstone and limestone.
2007-03-21 22:15:58 · answer #4 · answered by evokid 3 · 0⤊ 0⤋