Author: Shubber B., co-author
Organization: Society for sedimentary Geology (SEPM Special Publication)
Publication date: 1997
The Oligocene-Miocene Port Vincent Limestone is one of several Tertiary units exposed along coastal cliffs on the western side of the St. Vincent Basin and can be traced off-shore via bore holes, where it reaches a maximum thickness of 125 m. Sedimentologically, the succession is divided into three informal members. The lower member comprises two transgressive facies, a bryozoan miliolid-echinoid packstone/rudstone and a bryozoan bivalve floatstone. The middle member is the largest and comprises five, meter-scale, hardground-bounded, asymmetric, warming-upward subtidal cycles. The upper member comprises fine, highly abraded bryozoan-echinoid grainstone facies, which represents deposition on an outer middle ramp. Lithological and petrophysical variations are attributed to regional environmental changes and were later accentuated by selective diagenesis.
Learn more: http://archives.datapages.com/data/sepm_sp/SP56/warming-upward_subtidal_cyclesop.htm
