tephraash
Tephraash is a term used in volcanology to describe the finest fraction of tephra produced during explosive volcanic eruptions. It consists of ash-sized fragments that are carried by eruption plumes and deposited as ash fall. Tephra is commonly classified by particle size, and tephraash represents the most distal, fine-grained component of ejecta.
Formation and composition: Tephraash particles are typically less than 2 millimeters in diameter, often in the
Transport, deposition, and effects: Tephraash is entrained in eruption plumes and transported by atmospheric winds, sometimes
Scientific use and hazards assessment: In geology and volcanology, tephraash layers enable tephrochronology and stratigraphic correlation.