Zakręt Śmierci GEOSITE

Title: Zakręt Śmierci GEOSITE
Description: It occurs exposedly within the rocks of the Karkonosze-Izera massif. The rocks near the road show a sharp, unconforming contact between the granites of the Karkonosze Pluton and the rocks of the Jizera Metamorphic, changed by the thermal influence of the granites (700–750°C). The cover rocks are represented by hornfels composed of quartz, feldspar, biotite, andalusite, cordierite with the participation of magnetite, corundum and tourmaline. We observe the interlocking of dark gray hornfels with granites, as well as small veins of light, fine-grained aplites. The contact is intrusive, in places within the granites there are irregular hornfels blocks of various sizes (up to 20-30 cm), often with quartz pockets, the so-called intrusive breccias. The hornfels blocks are partly clearly displaced by the granite.
Geosite element: Metamorphic Aureola-Jizera Massif; Karkonosze Granite
Lithology: granite; hornfels
Related to event: Karkonosze intrusive event
Event environment: continental crustal setting
Older named age: Carboniferous
Interest: Petrographic; Showing intrusive contact
Petrography of contact metamorphic rocks
Petrography of plutonic rocks