Sedimentary rock was formed when sand, mud, even plant and animal life settled to the bottom of an ocean, river, or swamp, forming layers which were solidified under time and pressure.
(Sedimentary rock; was formed; T:when sand, mud, even plant and animal life settled to the bottom of an ocean, river, or swamp, forming layers) (sand, mud, even plant and animal life; settled; to the bottom of an ocean, river, or swamp, forming layers) (layers; were solidified; T:under time and pressure)
Sedimentary rock sand, mud, even plant and animal life layers
was formed settled were solidified
T:when sand, mud, even plant and animal life settled to the bottom of an ocean, river, or swamp, forming layers
to the bottom of an ocean, river, or swamp, forming layers
T:under time and pressure