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Agates of the Kaczawa Mountains
Patterns, layers and agate localities in Lower Silesian volcanic rocks.
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Agates of the Kaczawa Mountains are associated with the region's ancient volcanism. Their occurrence is described in rocks formed during the Carboniferous and Permian periods. The collection brings together several localities, showing varied colours alongside different shapes of mineral-filled spaces.
At Nowy Kościół and Sokołowiec, agates occur in rhyolites and rhyolitic tuffs. Cut nodules may display star-shaped or atoll-like patterns, or parallel bands known as the Uruguayan type. Gozdno provides large nodules and fragments, as well as agates forming veins, lenses and layered accumulations.
Lubiechowa offers examples of amygdales filled with minerals: quartz occurs alongside calcite, barite and zeolites. Przeździedza is represented by vein agates and jasper-like material. Specimens from Płóczki show a wide range of colours and banding. The locality names organise the collection geographically; the pattern inside a cut stone makes it possible to compare the arrangement of successive mineral layers.
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A cut agate reveals bands and patterns. In the Kaczawa Mountains these stones are associated with ancient volcanic rocks. Very different specimens can come from the same region.
Agates from Nowy Kościół and Sokołowiec may have star-like patterns or parallel stripes. Larger nodules and veins also occur at Gozdno. At Lubiechowa, quartz, calcite, barite and zeolites fill spaces that were once empty in the rock. Specimens from Płóczki have many colours and band patterns. Cutting a stone reveals a pattern that helps us compare its structure.
Question 1 sur 2
Which rocks contain the described agates from Nowy Kościół and Sokołowiec?
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