Footprints of past geological events recorded in the petrography and mineralogy of rocks from the Krucze Skały excavation (Karkonosze Mountains, SW Poland)

Abstract The Krucze Skały excavation is located within the Izera-Kowary Unit, which is a subdivision of the Karkonosze-Izera Massif. Traces of numerous geological events have previously been recognised and described in other locations within this unit. In this specific location only pegmatitic intrusions have been tested tested until now. This research considers the geological history recorded in the petrography and mineralogy of all remaining rocks. Samples collected along the excavation were analysed using a polarising microscope and the XRD method. During the examination, records of the magmatic genesis of these rocks protolith, as well as evidence of MP-LT and LP-HT metamorphism, metasomathosis and hydrothermal activity were found.