Lower Permian (Wolfcampian) Archaeolithoporella-Tubiphytes-Sponge Boundstones from the Subsurface of West Texas
Following the extinction of the Siluro-Devonian coral-stromatoporoid reef community during the Late Devonian, there was slow evolution of a new reef community which reached its acme in the Late Paleozoic. Here, the dominant type of organic buildup in the Pennsylvanian and Early Permian (Wolfcampian) of the southwestern United States were phylloid algal mounds. These mounds consist mainly of unbound bafflestones composed of delicate phylloid algal blades and carbonate mud (Wray 1968), and locally, Archaeolithophyllum-bound sediments (Wray 1964), and capping Tubiphytes boundstones (Malek-Aslani 1970), or a consortium of phylloid algae, encrusting foraminifers and bluegreen algae (Toomey et al. 1977) (Fig. 1).
KeywordsReef Community Zone Versus Calcareous Sponge Sacramento Mountain Peloidal Packstones
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