General Characteristics

County (administration): Liberec Region
District (town): Semily
Cadastre: Poniklá
Map 1 : 50 000 (sheet No): 0341, 03411
Geological region: Lužice Pluton and Krkonoše-Jizera Massif; Krkonoše-Jizera crystalline complex
Accessibility: - no traffic restriction ( by car)
Excursion locality: yes
ID : 563

Geology

Short characteristics of the site: Jizera River channel with outcrops of greenschists and graphitit phyllites with interlayers of laminated silicites (lydites). Graptolite finds in phosphorite concretions which evidence a Silurian age. The only locality with paleontologically proved Silurian.
Regional geologic unit: Bohemian Massif - crystalline complex and pre-Variscian Palaeozoic - Lugicum - Krkonoše-Jizerské hory Mts.crystalline complex
Stratigraphy: paleozoikum
Subject: paleontology, petrology, sedimentology
Geological phenomenon: river channel, concretion
Genesis: metamorphic (general metamorphism), sedimentary
Rock: black shale, phyllite

Territorial conservation

Level of protection: Interesting geological localities in National park
Protection of a geol. phenomenon: C - Geological phenomenon is the reason for a registration in the database of CGS
Part of LEPA (Large-size especially protected areas): NP (National park) - Krkonoše
Conflicts of interests: without conflicts

References

Horný /1964/ Chlupáč /1993/ Chaloupský et al./1989/; Kachlík V. et.al. (2013): Vysvětlivky k základni geologické mapě ČR 1 : 25 000 list 03-411 Rokytnice nad Jizerou. MS archiv ČGS.

Elaboration and Updating

Elaborated by: Chlupáč Ivo, 22.04.93
Updated by: Kachlík Václav 11.11.12

Citation

The database Significant geological localities of the Czech Republic: 563 [online]. Prague: Czech Geological Survey, 1998 [cit. 2024-04-20]. Available from: http:// lokality.geology.cz/563.

Location in map: