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 ?
In contrast, a much more comprehensive use-wear study at site FAO on Garua Island by Nina Kononenko (2007; 2011) detected no significant changes in the use of obsidian flaked stone tools from before and during the time of Lapita style pottery, as defined by the tephrostratigraphy of the site.
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.
This study expands the regional tephrochronology for the Kenai Peninsula of south-central Alaska by investigating the tephrostratigraphy of two peatland sites.
In order to gain some insight into the history and relative age of the parent materials and paleosols, they were compared with samples taken from the nearby site of FAAH (Figure 2), where there is a sequence of interbedded tephras and paleosols that correlates with the well-dated Holocene tephrostratigraphy for this region (Machida et al.