Anielska Góra rhyolite quarry, Przedwojów, Gmina Kamienna Góra, Kamienna Góra County, Lower Silesian Voivodeship, Polandi

Regional Level Types
Anielska Góra rhyolite quarry	Quarry (Inactive)
Przedwojów	Village
Gmina Kamienna Góra	Gmina
Kamienna Góra County	County
Lower Silesian Voivodeship	Voivodeship
Poland	Country

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PhotosMapsSearchMineralogy

A mountain. Porphyry rocks.
Old abandoned quarry on the south slope of Anielska Góra 651m (Germ. Angenelliberg), part of the Góry Krucze (see Mindat Stone Mountains, Poland)

Awdankiewicz (1998) states "The Gory Krucze rhyolites form an extensive outcrop along the western limb of the Intra-Sudetic Basin. They attain their greatest thickness of about 500-700 m west of Chełmsko Śląskie, and northwards gradually wedge out, down to 200-300 m near Przedwojów and c. 50 m near Czarny Bór. Rhyolites occur above the Kamienna Góra basaltic trachyandesites, within sandstones and mudstones of the upper part of the Słupiec Formation, corresponding to the Walchia Shales. Southwards, the sedimentary rocks and the basaltic trachyandesites wedge out and the rhyolites unconformably overlie deposits of the lower part of the Krajanów Formation, and are unconformably overlain by the Radków Formation. The latter contains abundant detritus apparently derived from the Góry Krucze rhyolites. The massive rhyolites show platy joints and locally indistinct flow banding and small flow folds. The coarse-grained rhyolitic breccias are characterised by an open to compact framework and consist of angular to subangular rhyolite blocks up to 50 cm in size, rare quartz pebbles and subangular trachyandesite (?) clasts and calcite or barite cement (Anielska Góra quarry). They usually form chaotic accumulations tens of metres thick, with irregular joints, but in places show gently inclined amalgamated bedding, with individual beds 15-60 cm thick. The fine-grained rhyolitic breccias form a 4 m thick, massive bed characterised by an open framework that consists of aligned rhyolitic fragments, up to 15 mm long. Subordinate components are mudstone and phyllite clasts and the sandy matrix is composed of angular fragments of rhyolite, quartz and feldspars, white mica and biotite flakes and clay minerals cemented with chalcedony. The rhyolitic sandstones, observed in loose blocks only, lithologically resemble the matrix of the above described breccias."

Mineral List

4 valid minerals.

Rock Types Recorded