Dolní Rokytnice
General Characteristics
County (administration):
Liberecký kraj
District (town):
Semily
Village:
Rokytnice nad Jizerou
Cadastre:
Dolní Rokytnice
Map sheets:
03-41 Semily, 03-411 Rokytnice n.J.
Accessibility:
no traffic restriction ( by car)
ID:
3636
Geology
Short characteristics of the site:
Roadcutting show one of the best locality of calc-silicate rocks (erlans) on the map sheet Rokytnice n. Jizerou. The erlans layer is embedded within calcareous phyllites, close to the contact with orthogneiss. Small lenses of limestones are intercalated within erlan, bigger bodies are in the close proximity. The erlans are typically banded, the banding is caused by various content of K-feldspar and epidote (grey-greenish colour), vs. rose colour. The erlans contas a large amount of fine grained K feldspar, epidote, minor diopsid pyroxene, chlorite and titanite, Quartz and oqaque mineral are accessories.
Regional geologic unit:
Bohemian Massif > Lugicum > -Krkonoše-Jizerské hory Mts. crystalline complex > Krkonoše crystalline complex
Stratigraphy:
Paleozoic
Subject:
geology, petrology
Geological phenomenon:
horizontal section
Genesis:
metamorphic (general metamorphism), metamorphic (contact metamorphism)
Rock:
calc-silicate rock
Territorial protection
Level of protection:
Interesting geological localities in National park
Part of LEPA (Large-size especially protected areas):
Krkonošský národní park
Conflicts of interests:
road construction
References
- Chaloupský, J., ed. (Ed.), 1989. Geologie Krkonoš a Jizerských hor. Ústř. Úst. geol.,, Praha, 288. pp
Elaboration and Updating
Elaborated by:
Václav Kachlík, 11.11.2012
Updated by:
Citation
The database Important geological localities of the Czech Republic: 3636 [online]. Prague: Czech Geological Survey, 1998 [cit. 2023-06-16]. Available from: https:// lokality.geology.cz/3636.
Location in map:
Assessment
Scientifical assesment:
medium
Educational assesment:
middle
Significance:
regional
Representativeness:
middle
Geological importance:
geo-regional value (mapping)
Locality conditions:
no problems
You can send information about a change in the status of the site to lokality@geology.cz
