WebJan 1, 1992 · Coeval coal-bearing strata (and, probably, cyclothems) also underlie large areas of the Gulf of St. Lawrence which, together with the Sydney region, is about 80,000 km [sup 2] in area. Biostratigraphic studies indicate that the Westphalian D to early Stephanian correlates with the Desmoinesian/Missourian of the interior US.

Cyclothem - an overview ScienceDirect Topics

WebConglomerate is a sedimentary rock that looks like concrete. It consists of large, rounded pebbles (clasts) cemented by a matrix made of calcite, iron oxide, or silica. Conglomerate rock occurs where gravel can become … WebThe four cyclothems are characterized by rapid transgression and relatively slow regression of the sea across a gently tilting shelf. A thin, basal transgressive carbonate is overlain by marine shale, representing maximum inundation by the sea. literary spectrum

(PDF) New Insights into Carboniferous Cyclothems. The

http://dictionary.sensagent.com/cyclothems/en-en/ Webcyclothem (pl. cyclothems) A vertical stratigraphic sequence caused by repeated flooding by the sea WebIn geology, cyclothems are alternating stratigraphic sequences of marine and non-marine sediments, sometimes interbedded with coal seams. Historically, the term was defined by the European coal geologists who worked in coal basins formed during the Carboniferous and earliest Permian periods. The cyclothems consist of repeated sequences, each … important criminal law cases