Pyroclastic rocks are rocks composed exclusively or mainly of products of volcanic activity. The name "pyroclast" derives from the Greek "pyr", "fire", and from "klastó [s]", "broken". They are formed during an explosive eruption from falling deposits or pyroclastic flows. The pyroclastic rocks contain within them material coming directly from the eruption, which takes the name of the “juvenile” component, and of foreign material, called the “lithic” component. The samples in the photo come from the Emmelberg quarry near Üdersdorf (Germany).
Dimensions
Height (cm): 6.1
Depth (cm): 4.9
Width (cm): 8.2
Weight (g): 147
Property
Chemical Formula: Not available
Mohs scale: Not available
Relative density: Not available
Crystalline System: Not available
