Two Types of "Augen Gneisses" in the Snieznik Metamorphic Unit, West Sudetes, Poland

Geolines | January 1, 2006| | Copyright

Snieznik Metamorphic Unit is the easternmost part of the OrlicaSnieznik Dome. It comprises metasedimentary-metavolcanogenic rocks of the Stronie-Mlynowiec formation and widespread gneissic formation, traditionally subdivided into Snieznik and Gierattów gneisses (see Don et al. 1990). The first ones are defined as coarse- to even-grained, rodding to flattened, augen (ortho)gneisses, while the second ones are diversified assemblage of rocks, within which one can identify fine-grained and compositionally banded (para)gneisses to embrechnites, biotite-rich and biotite-poor aplite-like homogenous ...

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