Autor: Shubber B., co-author
Organización: Society for sedimentary Geology (SEPM Special Publication)
Fecha de publicación: 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.
Consulta este material: http://archives.datapages.com/data/sepm_sp/SP56/warming-upward_subtidal_cyclesop.htm
