Sedimentary environment of the condensed Ordovician limestones from Mójcza section (Holy Cross Mts.)

Authors

  • Wiesław Trela Holy Cross Mts. Branch, Polish Geological Institute, Zgoda 21, PL-25-953 Kielce

Keywords:

Holy Cross Mts., Ordovician, microfacies, sea-level changes, drowned platform

Abstract

The paper deals with sedimentary evolution of the condensed Ordovician sequence outcropping in Mójcza village, near Kielce (Central Poland), basing on microfacies analysis. The occurrence of fossils, their preservation and mineral composition enabled the author to distinguish five microfacies types. The Mójcza section is generally composed of grainstones and packstones which form the Mójcza Limestone Formation, and calcareous claystones intercalated with wackestones assigned to the Zalesie Formation. The deposition of limestones from the Mójcza section took place on the outer part of drowned isolated carbonate platform of temperate water setting in uniform sedimentary conditions with low accumulation rate. This environment, located in the upwelling currents activity area, was favourable for phosphatization of sediment. Abundance of ferruginous ooids in the upper Llanvirn, L1andeilo and upper Caradoc sediments suggests highstand sea-level conditions during Middle and Upper Ordovician.

Downloads

Published

2013-01-27

Issue

Vol. 42 No. 3 (1998)

Section

Articles

License

Authors who publish with this journal agree to the following terms:
  1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as this can lead to productive exchanges and earlier and more frequent citation of the published work (See The Effect of Open Access).