A bone bed without bones: the Middle Cambrian 'fragment limestone' of Scania, Sweden
2006 (English)Conference paper (Refereed)
The Middle Cambrian 'fragment limestone' of southeastern Scania (S. Sweden) is a greenish-gray wacke- to packstone layer that varies in thickness from 2 to 20 cm, overlying the Gislöv Formation (sensu stricto) with an erosive contact. It is extremely rich and diverse in small phosphatic-shelled fossils: 16 different taxa have been identified thus far, among which the phosphatic shelled brachiopods are the most common (seven taxa). Other faunal elements are paraconodonts (two taxa), palaeoscolecids (two taxa), phosphatocopids (at least two taxa), Microdyction sp., Lapworthella sp., and Hyolithellus sp., and undeterminable trilobite hash. Petrographic features of the fragment limestone such as phosphorite nodules, pyrite and authigenic glauconite, scattered quartz grains, the high content of phosphatic-shelled organisms, as well as signs of stratigraphic mixture (reworking), presence of intraclasts, and an erosive sole indicate a genesis similar to classical bone beds such as the Muschelkalk Grenzbonebed of South Germany. The fragment limestone is considered here to be a condensation deposit (Konzentratlagerstätte) in which phosphatic-shelled organisms have been enriched by long-term sedimentary reworking and winnowing of finer material.
Place, publisher, year, edition, pages
2006. 72- p.
IdentifiersURN: urn:nbn:se:uu:diva-20320OAI: oai:DiVA.org:uu-20320DiVA: diva2:48093