Skip to main content

IMIS

A new integrated search interface will become available in the next phase of marineinfo.org.
For the time being, please use IMIS to search available data

 

[ report an error in this record ]basket (1): add | show Print this page

one publication added to basket [382987]
Radiolitid rudists: an underestimated archive for Cretaceous climate reconstruction?
Schmitt, K.E.; Huck, S.; Krummacker, M.; De Winter, N.J.; Godet, A.; Claeys, P.; Heimhofer, U. (2022). Radiolitid rudists: an underestimated archive for Cretaceous climate reconstruction? Lethaia 55(4): 21. https://dx.doi.org/10.18261/let.55.4.4
In: Lethaia. Wiley-Blackwell: Oslo. ISSN 0024-1164; e-ISSN 1502-3931, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine/Coastal

Authors  Top 
  • Schmitt, K.E.
  • Huck, S.
  • Krummacker, M.
  • De Winter, N.J., more
  • Godet, A.
  • Claeys, P., more
  • Heimhofer, U.

Abstract

    Rudist shells are important archives for palaeoenvironmental reconstructions in the greenhouse world of the Cretaceous. Radiolitids, a family of rudists became very abundant dwellers of the shallow marine carbonate platforms during the Cretaceous. Still, due to the complex structure of their low-Mg calcite outer shell layer, radiolitids are often deemed unsuitable for palaeoenvironmental reconstructions. The aim of this study is to present a combination of petrographic (transmitted light microscopy and cathodoluminescence microscopy) and elemental analyses (high-resolution µXRF and stable isotope) to investigate radiolitid shells for diagenetic alteration and to make them accessible as an archive for environmental conditions during the mid-Cretaceous. Four Eoradiolitites shells were analysed in detail: two right valves (RV), a left valve (LV) with an articulated RV and an isolated LV. Three shell structure types have been identified, including a non-compact, compact and celluloprismatic types. The compact structure type was identified in the LVs while the other two types were observed exclusively in the RVs. Radiolitid shell material composed of the non-compact and the compact structure types can be used as palaeoenvironmental archives as it preserved seasonal signals in both, shell growth structure and isotopic records, while celluloprismatic shell structures are less suitable for reconstructions due to diagenetic alteration. The alternation of dark and light lamellae in both valves, RV and LV, provide information on the intertidal living habitat of the shell-producing organism and its life span.


All data in the Integrated Marine Information System (IMIS) is subject to the VLIZ privacy policy Top | Authors