GEOLOGY

Detailed explanation-1: -The sedimentary rock cover of the continents of the Earth’s crust is extensive (73% of the Earth’s current land surface), but sedimentary rock is estimated to be only 8% of the volume of the crust. Sedimentary rocks are only a thin veneer over a crust consisting mainly of igneous and metamorphic rocks.

Detailed explanation-2: -Sedimentary rocks are layers of accumulated sediments that can contain coal, petroleum, and natural gas, which are preserved in rocks over millions of years. Sedimentary rocks, which include chalk, shale, clay, sandstone, and limestone, cover approximately 75 percent of the Earth’s surface.

Detailed explanation-3: -Sediments are loose, unconsolidated rock particles and ions (i.e., charged atoms) dissolved in aqueous solutions. Sedimentary rocks, which constitute about 75% of all rocks exposed at the surface of the Earth, form when the particles are cemented together or when crystals precipitate from the solutions.

Detailed explanation-4: -Sedimentary rocks cover 75% of continents. Sedimentary rocks are sediments that have been compacted and cemented to form solid rock bodies (lithified). The original sediments can be composed of: 1) Fragments of other rocks and minerals, such as gravel from a river, sand from a beach (or desert), mud from a deep ocean.

Detailed explanation-5: -Sedimentary rocks make up 75 percent of the rocks at the earth’s surface but only 5 percent of the outer 10 miles of the earth. Sediment, as distinguished from sedimentary rock, is a collective name for loose, solid particles and is generally derived from weathering and erosion of preexisting rock.