Ordovician reefs and climate

a review

    Research output: Chapter in Book/Report/Conference proceedingChapter

    59 Citations (Scopus)

    Abstract

    Ordovician reefs have a relatively restricted distribution within carbonate depositional belts of the world. Early Ordovician reefs mainly comprise undifferentiated algal- or sponge-dominated mounds of small size. Middle Ordovician reefs have a much broader geographical distribution, a wider range of morphological differentiation and some attain barrier-reef dimensions. A much greater variety of frame-building organisms are represented including stromatoporoids, corals and bryozoans. Late Ordovician reefs are similarly widely distributed but are not as large. Of the two phases of warming suggested by reef occurrences in Baltoscandia, the first in the late Carodoc probably results from a short-lived maximum expansion of the tropical-subtropical belts with accompanying reduction in the latitudinal temperature gradient. The second in the late Ashgill coincides with the period of major glaciation. Reefs continued to grow at the height of the glaciation but apparently in much narrower tropical-subtropical belts.-from Author Dept. Geol. & Geophysics, Univ. of Sydney, NSW, 2006, Australia.

    Original languageEnglish
    Title of host publicationAspects of the ordovician system
    EditorsD.L. Bruton
    Place of PublicationOxford, UK
    PublisherOxford University Press
    Pages89-100
    Number of pages12
    ISBN (Print)8200063194, 9788200063193
    Publication statusPublished - 1984

    Publication series

    NamePalaeontological contributions from the University of Oslo

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  • Cite this

    Webby, B. D. (1984). Ordovician reefs and climate: a review. In D. L. Bruton (Ed.), Aspects of the ordovician system (pp. 89-100). (Palaeontological contributions from the University of Oslo). Oxford, UK: Oxford University Press.