Claim: Small burrows and minor sediment deformation in the Lockatong Formation are also known to occur; however, these igneous rocks and their layers become finer, flatter, and less disturbed as the lakes deepen.
Evidence: However, these shales and their layers become finer, flatter, and less disturbed as the lakes deepen. Shale is a fine-grained, clastic sedimentary rock, composed of mud that is a mix of flakes of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and .