Red Devonian trilobites with green eyes from Morocco and the silicification of the trilobite exoskeleton

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Klug C, Schulz H, de Baets K
Zeitschrift: Acta Palaeontologica Polonica
Verlag: Polska Akademia Nauk, Instytut Paleobiologi (Polish Academy of Sciences, Institue of Paleobiology)
Jahr der Veröffentlichung: 2009
Band: 54
Heftnummer: 1
Seitenbereich: 117-123
ISSN: 0567-7920
eISSN: 1732-2421


Abstract


Latest Emsian (Early Devonian) sediments at the famous mud-mound- and trilobite-locality Hamar Laghdad (Tafilalt, Morocco) yielded some red-coloured remains of phacopid trilobites. Closer examination revealed that the eyes of these phacopids are often greenish in colour. EDX-analyses showed that the lenses retained their original calcitic composition, possibly greenish due to Fe- and Mn-impurities, while most of the exoskeleton was silicified. The silicified parts contain elevated concentrations of iron which causes the red colour. This phenomenon is explained by the porosity of the exoskeleton in contrast to the homogeneous and massive construction of the lenses and their Mg-content. These incompletely silicified trilobites enabled a reconstruction of the silicification process in trilobites. Their diagenetic alteration probably occurred as a result of events associated with the Cretaceous transgression.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

de Baets, Kenneth PD Dr.
Lehrstuhl für Paläoumwelt


Einrichtungen weiterer Autorinnen und Autoren

Eberhard Karls Universität Tübingen
Universität Zürich (UZH)


Zitierweisen

APA:
Klug, C., Schulz, H., & de Baets, K. (2009). Red Devonian trilobites with green eyes from Morocco and the silicification of the trilobite exoskeleton. Acta Palaeontologica Polonica, 54(1), 117-123. https://dx.doi.org/10.4202/app.2009.0112

MLA:
Klug, Christian, Hartmut Schulz, and Kenneth de Baets. "Red Devonian trilobites with green eyes from Morocco and the silicification of the trilobite exoskeleton." Acta Palaeontologica Polonica 54.1 (2009): 117-123.

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