Changes

=== Sedimentary rock ===

=== Sedimentary rock ===

Sedimentary rocks are formed by sand and other sediments which settle out of suspension in water, as well as the hard parts of small aquatic organisms such as [[plankton]], which accumulate on the bottom of a body of water and undergo [[lithification]].  Although only about 8% of the earth's rocks are sedimentary, 75%-80% of the Earth's land area is covered in sedimentary rock.[http://honolulu.hawaii.edu/distance/gg101/Programs/program21%20SedimentaryRocks/program21.html]  Therefore, geologists point out, there is irrefutable evidence that at least 75% of the Earth's land was once covered in water.

Sedimentary rocks are formed by sand and other sediments which precipitate from solution, and undergo [[lithification]].  Although only about 5% of the earth's rocks are sedimentary, 75%-80% of the Earth's land area is covered in sedimentary rock.[http://honolulu.hawaii.edu/distance/gg101/Programs/program21%20SedimentaryRocks/program21.html]  Therefore, flood geologists point out, there is irrefutable evidence that at least 75% of the Earth's land was once covered in water.

=== Sufficient water ===

=== Sufficient water ===