Prachovna
General Characteristics
County (administration):
Liberecký kraj
District (town):
Semily
Village:
Hrubá Skála
Cadastre:
Hrubá Skála
Map sheets:
03-34 Sobotka, 03-342 Rovensko p.T.
Accessibility:
no traffic restriction ( by car)
ID:
3228
Geology
Short characteristics of the site:
Bohemian Cretaceous Basin. Part of the Hrubá Skála rock city (castellated sandstones), belonging to the area of the UNESCO Geopark. Depositional history can be seen on a cliff section. Two sandstone bodies of deltaic origin are separated by transgressional plane covered by residual gravel. Several types of current bedding can be observed. Herring-bone bedding is possibly of tidal origin. This locality is classified as a Nature Reserve in the Protected Landscape Area Český ráj - the Bohemian Paradise.
Regional geologic unit:
Bohemian Massif > Cretaceous of the Bohemian Massif > Bohemian Cretaceous Basin > Bohemian Cretaceous Basin - Jizera development
Stratigraphy:
Upper Cretaceous
Subject:
geomorphology, sedimentology
Geological phenomenon:
rock, bedding, unconformity
Genesis:
sedimentary
Rock:
sandstone
Territorial protection
Level of protection:
Nature reserve in Protected landscape area
Part of LEPA (Large-size especially protected areas):
Český ráj
Additional information:
See the Digital register of the Agency for Nature Conservation and Landscape Protection of the Czech Republic AOPK ČR, code 1935 (Hruboskalsko)
Part of national geopark:
Bohemian Paradise
Conflicts of interests:
tourism
References
- Čech, S., et.al. (2011): Základní geologická mapa České republiky 1 : 25 000 s Vysvětlivkami 03-342 Rovensko pod Troskami. - Česká geologická služba. Praha.
- ULIČNÝ, D. (2001): Depositional systems and sequence stratigraphy of coarse-grained deltas in a shallow marine, strike-slip setting: the Bohemian Cretaceous Basin, Czech Republic. – Sedimentology, 48, 599–628.
- ULIČNÝ, D. – ČECH, S. – GRYGAR, R. (2003): Day 2. Tectonics and Depositional Systems of a Shallow-Marine, Intra-Continental Strike-Slip Basin: Exposures of the Český ráj Region, Bohemian Cretaceous Basin. Excursion Guide. 8th Meeting of the Czech tectonic Studies Group. Hrubá Skála Chateau, Czech Republic, April 24-27, 2003. – Geolines, 16, 133–148
Elaboration and Updating
Elaborated by:
Stanislav Čech, 15.07.2010
Updated by:
Čech Stanislav, 12.11.2011, Kukal Zdeněk, 26.11.2012, Kukal Zdeněk, 21.12.2017
Citation
The database Important geological localities of the Czech Republic: 3228 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/3228.
Location in map:
Assessment
Scientifical assesment:
medium
Educational assesment:
major
Significance:
supraregional
Representativeness:
major
Geological importance:
significant study profile, geo-regional value (mapping), geoturistic value
Excursion locality:
yes
Locality conditions:
no problems
You can send information about a change in the status of the site to lokality@geology.cz
