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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. 8139

No. of sample: g8139
Rock: tuf, vulkanity (+ vulkanosedimentární horniny)
Description: jeden kus
Localization: Březové Hory, šachta Vojtěch, 25.patro, překop od žíly Marie Pomocné k S,330m
Author: leg.Fiala,1970
Comment: Proterozoikum - spilitový vulkanismus, t. s uzavřeninami hyalopilitického spilitu, impregnovaný pyritem, výbrus 93229-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]