Volcanics and volcanisedimentary rocks

The volcanics (extrusive or effusive magmatic rocks) resulted from volcanic action on or near the Earth´s surface, either as lava flows or as volcanic explosion (volcanic ash, lapilli, bombs). The products can be retransported to considerable distance. Volcanisedimentary rocks consist of a mixture of volcanic products and sediments. These two compouds can be mixed or deposited in alternating layers. Tuffite is a good example.

Exhibition detail no. 8378

No. of sample:	g8378
Rock:	bazalt (čedič), vulkanity (+ vulkanosedimentární horniny)
Description:	jeden kus /vrtné jádro/
Localization:	Koněprusy, o. Beroun, vrt b-46, hl. 525,60m V obce, Velký vrch /Vemeno/

Author:	leg. F. Fiala, 1971
Comment:	Paleovulkanismus - silur - Barrandién, /metasomatický augitický syenit, ofitická struktura přechází postupně v hypidiomorfně zrnitou/ výbrus 905308-I

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Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]