Marine fossils are most often preserved in sedimentary rock that is formed by water depositing silt that compresses into rock over millions of years.
(Marine fossils; are preserved; L:in sedimentary rock; T:most often) (sedimentary rock; is formed; by water depositing silt) (water depositing silt; compresses; into rock over millions of years)
Marine fossils sedimentary rock water depositing silt
are preserved is formed compresses
L:in sedimentary rock T:most often
by water depositing silt
into rock over millions of years