Facies from Palaeozoic reefs and bioaccumulations.
341 pages
Palaeozoic Reefs and Bioaccumulations: Climatic and Evolutionary Controls.
291 pages
Fabric transitions from shell accumulations to reefs: an introduction with Palaeozoic examples
One unresolved conceptual problem in some Palaeozoic sedimentary strata is the boundary between the concepts of ‘shell concentration’ and ‘reef’. In fact, numerous bioclastic strata are transitional coquina–reef deposits, because either distinct frame-building skeletons are not commonly preserved in growth position, or skeletal remains are episodically encrusted by ‘stabilizer’ (reef-like) organisms, such as calcareous and problematic algae, encrusting microbes, bryozoans, foraminifers and sponges. The term ‘parabiostrome’, coined by Kershaw, can be used to describe some stratiform bioclastic deposits formed through the growth and destruction, by fair-weather wave and storm wave action, of …
Fabric transitions from shell accumulations to reefs: an introduction with Palaeozoic examples.
16 pages