Hekla 4 Tephra at Orrastašir

This search has found 11 analyses

The results of your search are shown on this page, which is divided into three sections. The first contains geochemical data in the form of electron probe microanalyses of the the tephra layer you have chosen, which can be downloaded. Most of these analyses will be of glass shards. The second section gives information about the instrument conditions and the third details about the sources of the data and the date and time of your search. You should always refer to the original sources to get the full context of the data presented here.


To download this data as a tab delimited file click here: save

  SiO2 TiO2 Al2O3 FeOMnOMgO CaO Na2O K2OTotal EP Ref
Glass74.590.1513.372. 98.912969
Glass74.340.1413. 98.452969
Glass74.210.0712.610.690.010.010.864.363.06 95.872969
Glass74.050.1413.422. 98.192969
Glass73.940.1213.101.840. 97.352969
Glass73.890.1312.812. 96.952969
Glass73.720.1113.141.820. 96.762969
Glass59.461.5914.749.890.242.505.913.891.38 99.612969
Glass57.801.4914.469. 97.532969
Glass56.771.6514.5210.390.272.415.863.901.39 97.182969
Glass56.631.4914.769.930.222.335.674.101.29 96.402969
FeO: total iron is represented as FeO
*original totals for normalised data (where applicable)

Instrument Conditions

These analyses were carried out under the following electron microprobe conditions.



The data on this page is from the following source(s). If you use this data please acknowledge the source of the data. The number preceeding each reference matches the Ref number on the data table above.

969: Boygle, J.E. (1994) Tephra in lake sediments: An unambiguous geochronological marker?  PhD. Thesis, University of Edinburgh, Edinburgh,

Data Sources

All of the data contained in this database is either published or donated. When using the data, acknowledgement must be made of the original source of the data and that the data was obtained from Tephrabase. See Copyright information.

This Tephrabase search was made on 29/9/2021 at 03:23:55 local time, Edinburgh, Scotland, UK.