Püroklastilised

Püroklastilised refers to a category of volcanic rocks and the associated geological processes. These rocks are formed from pyroclastic material, which is fragmented rock ejected from a volcano during an explosive eruption. This material can range in size from fine ash and dust to larger volcanic bombs. When deposited and lithified, these fragmented materials form pyroclastic rocks, such as tuff, lapilli tuff, and volcanic breccia.

Pyroclastic deposits are not only solid rocks but also include unconsolidated materials like ash fall deposits. The term also encompasses pyroclastic flow and surge deposits, which are formed by extremely hot, fast-moving currents of gas and volcanic debris that travel down the slopes of a volcano. These flows can bury landscapes and create distinctive geological features. The study of pyroclastic materials is crucial for understanding volcanic hazards and reconstructing the history of volcanic activity. The composition of pyroclastic rocks can vary widely, depending on the magma source and the nature of the eruption.