Calcareous Algae and Stromatolites by A. Pentecost (auth.), Dr. Robert Riding (eds.)

By A. Pentecost (auth.), Dr. Robert Riding (eds.)

This quantity offers a entire assessment of calcareous algae and stromatolites. It includes reports by means of prime experts of significant teams, including bills of floras via time. It bargains with marine and non-marine, benthic and planktic, and sleek in addition to historical examples. because the first multi-authored assessment of the sector ever released in English, it's a necessary reference textual content for this advanced box. it really is designed for either postgraduate researchers scientists who require up to date and authoritative info on those long-ranging organisms and materials that are of huge evolutionary, environmental and sedimentary value.

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Extra resources for Calcareous Algae and Stromatolites

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Cyanobacteria are the principal organisms involved in tufa stromatolite formation. Other types of tufa, not considered here because they are not laminated, include algal and moss tufa. Tufa stromatolites are not known from marine environments. g. ). g. Clarke 1900; Roddy 1915) which in freshwater may combine features of tufa stromatolites and skeletal stromatolites. These are produced by both biomineralization and inorganic mineralization. The former process is likely to be dominant in lakes, the latter in streams.

This present paper emphasizes dendrolite as yet another type. Dendrolites, although not hitherto dignified by a specific name, have been obvious fabrics within Early Palaeozoic reefs for many years. Thrombolites have themselves been named for more than twenty years. By drawing these deposits, along with travertine, into a broad category of calcareous benthic microbial deposits we can now begin to see the similarities which they share, alongside their differences, and thereby more precisely interpret their origins, distribution and development.

Width of view 38 mm Classification of Microbial Carbonates 35 sponge-like organisms such as archaeocyaths. They reappear in Upper Devonian reefs where the dendritic fossils are again Epiphyton and Renalcis Vologdin, or close relatives of these genera, and the principal metazoans with which they are associated are stromatoporoids. The "bacterial shrubs" which occur in some travertines (see Chafetz and Folk 1984, Fig. 1) have dendrolitic fabrics, but are arranged in layers. There is also a link with skeletal stromatolites, which differ from dendrolites principally in the presence oflamination, and with thrombolites which may show intergradation with dendrolites.

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