Complex sentence: This was followed by the Weverton Formation, Harpers Formation and Antietam formation in which sand and rock sedimented on the ocean floor forming quartzite and sandstone deposits.finally a period of sedimentation of shells and skeletons of foraminifera resulted in deposition of a layer of limestone.
Split into simpler sentences: This was followed by the Weverton Formation, Harpers Formation, and Antietam formation in which sand and rock sedimented on the ocean floor forming quartzite and sandstone deposits. Finally a period of sedimentation of shells and skeletons of foraminifera resulted in deposition of a layer of limestone.