Early Permian Freshwater Silicified Stromatolites and Oolites
from the Krkonoše Piedmont Basin (Bohemian Massif):
Paleobiology, Environmental Setting and Early Diagenesis

J 2025

Early Permian Freshwater Silicified Stromatolites and Oolites from the Krkonoše Piedmont Basin (Bohemian Massif): Paleobiology, Environmental Setting and Early Diagenesis

VODRAZKOVA, Stanislava; Radek VODRAZKA; Tomáš KUMPAN; Juraj FRANCU; Markéta HOLÁ et. al.

Basic information

Original name

Early Permian Freshwater Silicified Stromatolites and Oolites from the Krkonoše Piedmont Basin (Bohemian Massif): Paleobiology, Environmental Setting and Early Diagenesis

Authors

VODRAZKOVA, Stanislava; Radek VODRAZKA; Tomáš KUMPAN (203 Czech Republic, belonging to the institution); Juraj FRANCU; Markéta HOLÁ (203 Czech Republic, belonging to the institution) and Karel SLAVÍČEK (203 Czech Republic, belonging to the institution)

Edition

Bulletin of Geosciences, Czech Geological Survey, 2025, 1214-1119

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

10505 Geology

Country of publisher

Czech Republic

Confidentiality degree

is not subject to a state or trade secret

References:

URL

Impact factor

Impact factor: 1.500 in 2024

Organization unit

Faculty of Science

DOI

https://doi.org/10.3140/bull.geosci.1915

UT WoS

001538882700004

EID Scopus

2-s2.0-105011740457

Keywords in English

early Permian; Krkonoše Piedmont Basin; stromatolites; oolites; cyanobacteria; silicification

Abstract

In the original language

Late Palaeozoic non-marine microbialites remain poorly documented despite their potential significance for understanding terrestrial ecosystems during this period of profound climatic and environmental change. Here we report exceptionally preserved lower Permian (Autunian regional stage ˜ Asselian-Sakmarian) silicified stromatolites and oolites from the Krkonoše Piedmont Basin (Bohemian Massif, Czech Republic). Despite their occurrence in Quaternary eluvial and colluvial deposits, multiple lines of evidence suggest formation in a shallow, ephemeral fluviolacustrine setting. The stromatolites display a vertical succession of different growth forms, including structures similar to modern sheath-forming cyanobacterial taxa that form fan-like and hemispheroidal colonies with characteristic upright growth, features especially common in modern streams and rivers. Early diagenetic silicification preserved not only delicate stromatolitic architectures but also microbial organic matter. The presence of volcaniclastic material within ooidal cortices and cores, as well as within the rock matrix, indicates contemporaneous volcanic input, which likely provided silica for early replacement of the primary carbonate fabric. This exceptional preservation, facilitated by rapid CaCO3 encrustations of microbial structures and subsequent early silicification, provides rare insights into early Permian terrestrial ecosystems.

Links

GC20-20785J, research and development project

Name: Pátrání po stopách biogenicity a způsobu alterace zrn mikrobiálních facií devonu a karbonu, příklady z Českého masivu

Investor: Czech Science Foundation

Cite

VODRAZKOVA, Stanislava; Radek VODRAZKA; Tomáš KUMPAN; Juraj FRANCU; Markéta HOLÁ and Karel SLAVÍČEK. Early Permian Freshwater Silicified Stromatolites and Oolites from the Krkonoše Piedmont Basin (Bohemian Massif): Paleobiology, Environmental Setting and Early Diagenesis. Bulletin of Geosciences. Czech Geological Survey, 2025, vol. 100, No 2, p. 159-186. ISSN 1214-1119. Available from: https://doi.org/10.3140/bull.geosci.1915.

@article{2515398,
   author = {Vodrazkova, Stanislava and Vodrazka, Radek and Kumpan, Tomáš and Francu, Juraj and Holá, Markéta and Slavíček, Karel},
   article_number = {2},
   doi = {https://doi.org/10.3140/bull.geosci.1915},
   keywords = {early Permian; Krkonoše Piedmont Basin; stromatolites; oolites; cyanobacteria; silicification},
   language = {eng},
   issn = {1214-1119},
   journal = {Bulletin of Geosciences},
   title = {Early Permian Freshwater Silicified Stromatolites and Oolites from the Krkonoše Piedmont Basin (Bohemian Massif): Paleobiology, Environmental Setting and Early Diagenesis},
   url = {http://www.geology.cz/bulletin/contents/art1915},
   volume = {100},
   year = {2025}
}

TY  - JOUR
ID  - 2515398
AU  - Vodrazkova, Stanislava - Vodrazka, Radek - Kumpan, Tomáš - Francu, Juraj - Holá, Markéta - Slavíček, Karel
PY  - 2025
TI  - Early Permian Freshwater Silicified Stromatolites and Oolites from the Krkonoše Piedmont Basin (Bohemian Massif): Paleobiology, Environmental Setting and Early Diagenesis
JF  - Bulletin of Geosciences
VL  - 100
IS  - 2
SP  - 159-186
EP  - 159-186
PB  - Czech Geological Survey
SN  - 12141119
KW  - early Permian
KW  - Krkonoše Piedmont Basin
KW  - stromatolites
KW  - oolites
KW  - cyanobacteria
KW  - silicification
UR  - http://www.geology.cz/bulletin/contents/art1915
N2  - Late Palaeozoic non-marine microbialites remain poorly documented despite their potential significance for understanding terrestrial ecosystems during this period of profound climatic and environmental change. Here we report exceptionally preserved lower Permian (Autunian regional stage ˜ Asselian-Sakmarian) silicified stromatolites and oolites from the Krkonoše Piedmont Basin (Bohemian Massif, Czech Republic). Despite their occurrence in Quaternary eluvial and colluvial deposits, multiple lines of evidence suggest formation in a shallow, ephemeral fluviolacustrine setting. The stromatolites display a vertical succession of different growth forms, including structures similar to modern sheath-forming cyanobacterial taxa that form fan-like and hemispheroidal colonies with characteristic upright growth, features especially common in modern streams and rivers. Early diagenetic silicification preserved not only delicate stromatolitic architectures but also microbial organic matter. The presence of volcaniclastic material within ooidal cortices and cores, as well as within the rock matrix, indicates contemporaneous volcanic input, which likely provided silica for early replacement of the primary carbonate fabric. This exceptional preservation, facilitated by rapid CaCO3 encrustations of microbial structures and subsequent early silicification, provides rare insights into early Permian terrestrial ecosystems.
ER  -

VODRAZKOVA, Stanislava; Radek VODRAZKA; Tomáš KUMPAN; Juraj FRANCU; Markéta HOLÁ and Karel SLAVÍČEK. Early Permian Freshwater Silicified Stromatolites and Oolites from the Krkonoše Piedmont Basin (Bohemian Massif): Paleobiology, Environmental Setting and Early Diagenesis. \textit{Bulletin of Geosciences}. Czech Geological Survey, 2025, vol.~100, No~2, p.~159-186. ISSN~1214-1119. Available from: https://doi.org/10.3140/bull.geosci.1915.

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