Parameter Tree:
EARTH SCIENCE > PALEOCLIMATE > LAND RECORDS > VOLCANIC DEPOSITS

Definition:
Volcanic deposits can consist of tephra, which is airborne pyroclastic
material. Extremely explosive volcanic eruptions can produce vast quatntities
of tephra over wide areas. Tephra layers can form regional isochronous
stratigraphic markers. Tephrachronology can a very important tool in
paleoclimatic studies. Volcanic ash horizons can also be used as
chronostratigraphic markers.


Reference:
Bradley, R.S. 1999. Paleoclimatology: Reconstructing Climates of the
Quaternary, 2nd edition. Harcourt Academic Press.