
The SciencesDecember 1, 1979
Tephra
Airborne fragments from an erupting volcano, known collectively as tephra, come in a wide variety of sizes, shapes and compositions. The study of tephra deposits assists in the dating of ancient events

Tephra
Airborne fragments from an erupting volcano, known collectively as tephra, come in a wide variety of sizes, shapes and compositions. The study of tephra deposits assists in the dating of ancient events