I've always wondered that when I went to the beach.
2006-07-28 06:12:08 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
It totally depends on the beach you are at. Beaches in Texas and Louisiana have several miles of sand and shale underneath them that as it goes deeper becomes more consolidated into sandstone and shale. Below that is limestone. On some beaches in Louisiana and a few parts of Texas there are actually layers of salt beneath them, within the sandstone and shale.
Beaches in California are often quite thin, and are resting over folded and deformed sedimentary rocks like sandstone and shales. Beaches in Florida have limestone under them. Beaches in Maine are resting over metamorphic rocks. Beaches in Hawaii are over volcanic rocks such as basalt. Beaches in much of the Caribbean are over igneous rocks and metamorphics. Beaches on the northern part of Puerto Rico are resting on limestone.
2006-07-28 13:37:40 · answer #1 · answered by carbonates 7 · 5⤊ 2⤋
Actually, at a beach you should find:
1 - sand
2 - sand with the saturated zone of the water table
3 - bedrock of the variety found in generally the same area away from the beach. Usually layers of shale, interbedded with limestone, possibly other sedimentary rock.
2006-07-28 20:23:31 · answer #2 · answered by Rockmeister B 5 · 0⤊ 0⤋
According to Sequence Stratrigraphy, the layers under sand will be shales, then limestones.
2006-07-28 18:31:13 · answer #3 · answered by Amphibolite 7 · 0⤊ 0⤋
Eventually, you'll hit a stone shelf
2006-07-28 13:15:05 · answer #4 · answered by Anonymous · 0⤊ 0⤋
More sand...then rock...then dirt.... then the earth.
2006-07-28 13:15:23 · answer #5 · answered by ? 3 · 0⤊ 0⤋
Everything that isn't below.
2006-07-28 13:16:20 · answer #6 · answered by purple_amanecer 3 · 0⤊ 0⤋