tephrostratigraphy

tephrostratigraphy

[‚tef·rō·strə′tig·rə·fē]
(geology)
The use of pyroclastic layers, in particular volcanic ash, as a correlational tool in the study of stratigraphic sequences.
References in periodicals archive ?
P of tephrostratigraphy related to the main explosive activity of the NRV; 2) different types of pyroclastic, density-current deposits; 3) typical horseshoe-shapedamphitheatresandtheirassociateddebrisavalanchedeposits formed during the Older Ruiz stages; and 4) lava domes and lava flows related to La Pirana stage.
Among their topics are the stratigraphy and geochronology of the late Miocene Adu-Asa formation at Gona, tephrostratigraphy of the Hadar and Busidima formations, depositional environments and stratigraphic summary of the Pliocene Hadar formation, and herbivore enamel carbon isotopic composition and the environmental context of Ardipithecus at Gona.
By combining the tephrostratigraphy and associated chronology from Efate with regional ceramic sequences it is possible, even without radiocarbon dates, to estimate reliably a broad chronology for Teouma.