Petrological research of limestones of the Macocha Formation in
the Březina-Studánky locality

a 2022

Petrological research of limestones of the Macocha Formation in the Březina-Studánky locality

KOZÁKOVÁ, Sára a Tomáš KUMPAN

Základní údaje

Originální název

Petrological research of limestones of the Macocha Formation in the Březina-Studánky locality

Název česky

Petrologické studium vápenců macošského souvrství na lokalitě Březina-Studánky

Autoři

KOZÁKOVÁ, Sára a Tomáš KUMPAN

Vydání

Studentská geologická konference 2022, 2022

Další údaje

Jazyk

angličtina

Typ výsledku

Konferenční abstrakt

Obor

10506 Paleontology

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Označené pro přenos do RIV

Organizační jednotka

Přírodovědecká fakulta

ISBN

978-80-280-0061-5

Klíčová slova česky

devon; frasn; macošské souvrství; vilémovické vápence; mokerský cyklus; mikrofacie; paleoprostředií

Klíčová slova anglicky

Devonian; Frasnian; Macocha Formation; Vilémovice Limestone; Mokrá cycle; mikrofacies; paleoenvironment

Příznaky

Mezinárodní význam

Změněno: 6. 6. 2022 12:27, Mgr. Sára Kozáková

Anotace

V originále

Macocha Formation, which belongs to the Palaeozoic of the Moravian Karst, is a carbonate reef complex deposited during Middle and Upper Devonian (Eifelian to Frasnian; Hladil, 1983). We can distinguish 3 limestone members: Josefov, Lažánky and Vilémovice limestones, which differ in colour, grain size and fauna (Zukalová-Chlupáč, 1982). These limestone members are stacked in 4 cycles in the Macocha Formation, Čelechovice cycle, Býčí skála cycle, Ochoz cycle and Mokrá cycle (Hladil, 1999). The contribution is based on bachelor´s thesis which was focused on petrological research of limestones in the locality Březina-Studánky. The limestones on the site belong to the Vilémovice Limestone of Mokrá cycle and belong to Upper Frasnian. On the limestone outcrop, which has a thickness of 17m, 25 layers were studied, the thickness of which ranges from 20 cm to 150 cm. Lower layers are fine-grained to medium-grained calcisiltite, but in the upper layers we observe the occurrence of mostly fine-grained calciarenite. Bioclast belonging to representatives of the Anthozoa (Rugosa), Brachiopoda, Bryozoa and Porifera (Stromatoporoidea) were macroscopically observed in the field. In thin sections, these groups are often represented by large bioclasts to biomorphs, observed were mainly stromatoporoids (e.g., genera Amphipora, Idiostroma, Actinostroma) and brachiopods. The most typical microfacies is packstone with abundant intraclasts, peloids and calcimicrobes renalcids (genera Izhella), but rudstones, floatstones, grainstones and wackestones occur as well. Studied facies can be compared with the 4JB facies sensu Hladil (1999), which belong to the environment of the reef margin. The biota is characterised by great diversity of reef-builders and other groups of organisms. Noticeable are abundant calcimicrobes. – The research was financially supported by the Czech Science Foundation (project GAČR 20-20785J).

Citovat

KOZÁKOVÁ, Sára a Tomáš KUMPAN. Petrological research of limestones of the Macocha Formation in the Březina-Studánky locality. In Studentská geologická konference 2022. 2022. ISBN 978-80-280-0061-5.

@proceedings{1858553,
   author = {Kozáková, Sára and Kumpan, Tomáš},
   booktitle = {Studentská geologická konference 2022},
   keywords = {Devonian; Frasnian; Macocha Formation; Vilémovice Limestone; Mokrá cycle; mikrofacies; paleoenvironment},
   language = {eng},
   isbn = {978-80-280-0061-5},
   title = {Petrological research of limestones of the Macocha Formation in the Březina-Studánky locality},
   year = {2022}
}

TY  - CONF
ID  - 1858553
AU  - Kozáková, Sára - Kumpan, Tomáš
PY  - 2022
TI  - Petrological research of limestones of the Macocha Formation in the Březina-Studánky locality
SN  - 9788028000615
KW  - Devonian
KW  - Frasnian
KW  - Macocha Formation
KW  - Vilémovice Limestone
KW  - Mokrá cycle
KW  - mikrofacies
KW  - paleoenvironment
N2  - Macocha Formation, which belongs to the Palaeozoic of the Moravian Karst, is a carbonate reef complex deposited during Middle and Upper Devonian (Eifelian to Frasnian; Hladil, 1983). We can distinguish 3 limestone members: Josefov, Lažánky and Vilémovice limestones, which differ in colour, grain size and fauna (Zukalová-Chlupáč, 1982). These limestone members are stacked in 4 cycles in the Macocha Formation, Čelechovice cycle, Býčí skála cycle, Ochoz cycle and Mokrá cycle (Hladil, 1999). The contribution is based on bachelor´s thesis which was focused on petrological research of limestones in the locality Březina-Studánky. The limestones on the site belong to the Vilémovice Limestone of Mokrá cycle and belong to Upper Frasnian. On the limestone outcrop, which has a thickness of 17m, 25 layers were studied, the thickness of which ranges from 20 cm to 150 cm. Lower layers are fine-grained to medium-grained calcisiltite, but in the upper layers we observe the occurrence of mostly fine-grained calciarenite. Bioclast belonging to representatives of the Anthozoa (Rugosa), Brachiopoda, Bryozoa and Porifera (Stromatoporoidea) were macroscopically observed in the field. In thin sections, these groups are often represented by large bioclasts to biomorphs, observed were mainly stromatoporoids (e.g., genera Amphipora, Idiostroma, Actinostroma) and brachiopods. The most typical microfacies is packstone with abundant intraclasts, peloids and calcimicrobes renalcids (genera Izhella), but rudstones, floatstones, grainstones and wackestones occur as well. Studied facies can be compared with the 4JB facies sensu Hladil (1999), which belong to the environment of the reef margin. The biota is characterised by great diversity of reef-builders and other groups of organisms. Noticeable are abundant calcimicrobes. – The research was financially supported by the Czech Science Foundation (project GAČR 20-20785J).
ER  -

KOZÁKOVÁ, Sára a Tomáš KUMPAN. Petrological research of limestones of the Macocha Formation in the Březina-Studánky locality. In \textit{Studentská geologická konference 2022}. 2022. ISBN~978-80-280-0061-5.

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