Volcano vocab
Thursday, 29 March 2007
Today I’ve been thinking volcanoes, which sent me to the dictionary to check out a few technical terms:
tephra
air-fall material (pyroclastics) ejected from a volcano during eruption
ash
fine tephra particles <2mm in diameter
lapilli
tephra particles 2–64mm in diameter; multiple forms
volcanic bombs or blocks
tephra objects >64mm in diameter
fugacity
a thermodynamic property of a real gas that, if substituted for the pressure or partial pressure in the equations for an ideal gas, gives equations applicable to the real gas (this one has my head spinning)