Layers of sediments were deposited on the ocean floor, eventually hardening to form limestone and other sedimentary rock layers.
(Layers of sediments; were deposited; on the ocean floor; eventually hardening to form limestone and other sedimentary rock layers) (Layers of sediments; to form; limestone and other sedimentary rock layers)
Layers of sediments Layers of sediments
were deposited to form
on the ocean floor eventually hardening to form limestone and other sedimentary rock layers
limestone and other sedimentary rock layers