Natural monuments Moravian
Natural Monument of Erratic Bloc in Liptáň
Basic information
Erratic blocs represent boulders of various size made of exotic rocks which do not occur in our lands. They were transported to our lands by the activity of continental glacier during Middle Pleistocene some 250–800 thousand years ago. Erratic block in Liptáň was declared a natural monument in 1966.
Subject of protection
The biggest erratic bloc found in Osoblažsko area. It was moved to the current site at the beginning of the 20th century and it was complemented by two other smaller boulders.
Geology
The erratic block of Liptáň represents fine-grained porphyritic granite which most likely comes from massifs of South Sweden, from the time about 900 to 1000 million years ago. Being 220×130×120 cm large and having the weight of 4 7000 kg, it is one of the largest boulders in the Czech Republic. The colour of the rock is brown-pink. It has porphyritic structure with phenocrysts 2 – 7mm big which create grey –pink and white feldspars, plagioclase and brown- grey silica. Biotite and magnetic are present in the basic fine-grained matter apart from those already mentioned.
Liptáňský bludný balvan
Liptáňský bludný balvan
Useful information
Contacts
Krajský úřad Moravskoslezského kraje, odbor životního prostředí a zemědělství 28. října 117, 702 18 Ostrava www.kr-moravskoslezsky.cz tel.: +420 595 622 297
Contact
Krajský úřad Moravskoslezského kraje
Odbor životního prostředí a zemědělství
28. října 117, Ostrava
Tel.:+420 595 622 297
http://www.kr-moravskoslezsky.cz
