Fossils, which are evidence of past life, are found almost exclusively in the sedimentary rocks of the earth's crust.
(Fossils; are; evidence of past life) (Fossils, which are evidence of past life; are found almost exclusively; L:in the sedimentary rocks of the earth's crust)
Fossils Fossils, which are evidence of past life
are are found almost exclusively
evidence of past life
L:in the sedimentary rocks of the earth's crust