Dolní Lhota
General Characteristics
County (administration):
Jihomoravský kraj
District (town):
Blansko
Village:
Blansko
Cadastre:
Dolní Lhota
Map sheets:
24-14 Boskovice, 24-144 Rájec
Accessibility:
special entry permit necessary (military area, quarry, private land)
Technical object:
quarry, sand pit
ID:
3831
Geology
Short characteristics of the site:
This locality represents an active sandpit where the tectonic contact between Upper Cretaceous sediments with the Brno graniodiorite crops out. The biotite granodiorite with porphyry dykes was faulted over Cretaceous sediments. The sequence of Cretaceous sediments starts with the Peruc-Korycany Formation, the thickness of which is 125 metres (this is really a record thickness for the whole Bohemian Massif).The sediments of this formation consist of sandstones, silstones and spiculites. In the overlying sediments of the Bílá Hora Formation also glauconitic sandstones occur. This formation is present only as a relic.
Regional geologic unit:
Bohemian Massif > Cretaceous of the Bohemian Massif > Bohemian Cretaceous Basin > Bohemian Cretaceous Basin
Stratigraphy:
Cenomanian, Turonian
Subject:
sedimentology, structural geology, stratigraphy
Geological phenomenon:
lithological boundary, table mountain, fault, bedding
Genesis:
sedimentary, tectonic
Rock:
sandstone, siltstone, opuka (aranaceous marlstone), granodiorite
Territorial protection
Level of protection:
Registered interesting geological localities
Conflicts of interests:
reclamation, open cast mining
References
- Dvořák J. (1951): Křídový útvar v okolí Chlumů u Obory na Moravě.- Věst. Král. čes. Spol. Nauk, 14, 1-15, Praha.
- Dvořák, J. (1953): Křídový útvar východně od řeky Svitavy mezi Letovicemi a Hradcem nad Svitavou. – Rozpravy Československé Akademie Věd, řada MPV, 63, 1, 1-19.
- Melichar, R. – Čech, S. (1999): Blansko - Dolní Lhota. Geolines, 8, 90.
- Uličný, D. – Špičáková, L. – Grygar, S. – Svobodová, M. – Čech, S. – Laurin, J. (2009): Palaeodrainage systems at the basal unconformity of the Bohemian Cretaceous Basin: roles of inherited fault systems and basement lithology during the onset of basin filling. Bulletin of Geosciences 84(4), 577–610.
- Zelenka, P. – Šrámek, J. (1997): Železité konkrece v křídových pískovcích na Letovicku. – Acta Mus. Moraviae, Sci. Nat. 81, 85 - 91.
Elaboration and Updating
Elaborated by:
Tomáš Kumpan, 07.03.2015
Updated by:
Kukal Zdeněk, 25.09.2017
Citation
The database Important geological localities of the Czech Republic: 3831 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/3831.
Location in map:
Assessment
Scientifical assesment:
great
Educational assesment:
major
Significance:
regional
Representativeness:
major
Geological importance:
significant study profile, geo-regional value (mapping)
Locality conditions:
acceptable
You can send information about a change in the status of the site to lokality@geology.cz
