ichnofossils are the remains of plants and animals that have been preserved in sedimentary rock.
ichnofossils are the remains of plants and animals that have been preserved in sedimentary rock.
remains of plants and animals that have been preserved in sedimentary rock?
ichnofossils
most sedimentary rocks contain either quartz (especially siliciclastic rocks) or calcite (especially carbonate rocks). in contrast to igneous and metamorphic rocks, a sedimentary rock usually contains very few different major minerals. however, the origin of the minerals in a sedimentary rock is often more complex than in an igneous rock. minerals in a sedimentary rock can have formed by precipitation during sedimentation or by diagenesis. in the second case, the mineral precipitate can have grown over an older generation of cement. a complex diagenetic history can be studied by optical mineralogy, using a petrographic microscope.
sedimentary rock
sedimentary rocks contain important information about the history of the earth. they contain fossils, the preserved remains of ancient plants and animals. coal is considered a type of sedimentary rock. the composition of sediments provides us with clues as to the original rock. differences between successive layers indicate changes to the environment over time. sedimentary rocks can contain fossils because, unlike most igneous and metamorphic rocks, they form at temperatures and pressures that do not destroy fossil remains.









































section::::provenance.
sedimentary rock