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Rieger's Path

Continental drift

At the beginning of the Palaeozoic formed the basis for the future of the Bohemian Massif up to several hundred kilometers wide called microcontinent (terranes) that rested on the oceanic crust at the northern edge of the continent Gondwana. The remains are present Gondwana Africa, India, Australia, South America and Antarctica. In the marine environment formed massive clayey and sandy sediments, which were accompanied by volcanic activity. Deployment continents before 490 to 440 million years ago, during the period known as the Ordovician, significantly differed from the current situation. Emerging Czech massif lying south of the equator, roughly at the level of the current northern part of Antarctica. Gondwana was on the top of a large part of the Ordovician glaciation and glacier from making huge amounts of water. A turn for the warmer climate occurred just before the onset of the Silurian. Gondwana with adjacent microcontinent moved closer to the equator, roughly the level of the Tropic of Capricorn. The Silurian before 440–420 million years ago caused a shift towards the equator and the overall warming causing melting glaciers and rising sea levels. Microcontinent were during the collision with Gondwana continent called Severoatlantským Laurussií in the period before 380 to 300 million years ago The allocation of the continent. This was caused by subduction of oceanic crust beneath continental crust. Variscan orogeny was the result of precipitation and the southern continent Gondwana Laurussie. Variscan orogeny took place as a result of linking individual terranes during folding. Reconnecting mikrokontinetů and approximation Laurussie Gondwana and grew in intensity between the Late Devonian and culminated in the Lower Carboniferous. An extensive mountain range, which forms the basis of Western and Central Europe. The greatest relic of the Variscan mountain range in Central Europe is the Czech massif, which forms the bedrock of most of the Czech Republic.

Spring of Antal Stašek (Czech writer from Semily)

GPS position

N 50° 37.748', E 15° 18.376'
[GPX]

[MAPY.CZ]

Contact

Geopark UNESCO Český ráj
Jiří Vlasák
e-mail:vlasak@geopark-ceskyraj.cz
http://www.geopark-ceskyraj.cz