Hekla 4 Tephra at Mallin Head

This search has found 20 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 analyse 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.

Geochemistry

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  SiO2 TiO2 Al2O3 FeOMnOMgO CaO Na2O K2OTotal EP Ref
Glass74.480.1412.301.67 0.061.174.082.74 96.634968
Glass74.420.1612.621.72 0.041.294.132.71 97.094968
Glass74.370.1212.761.69 0.041.224.342.91 97.454968
Glass74.160.1412.591.66 0.061.264.132.95 96.944968
Glass73.860.2012.351.66 0.031.214.092.88 96.294968
Glass73.820.1212.361.70 0.041.244.272.78 96.324968
Glass73.790.1312.651.67 0.051.234.402.71 96.624968
Glass73.770.1313.461.55 0.051.564.372.79 97.674968
Glass73.750.1512.341.69 0.041.283.992.83 96.064968
Glass73.670.0612.531.78 0.051.244.002.80 96.134968
Glass73.630.1212.611.74 0.041.244.092.72 96.184968
Glass73.620.1412.681.75 0.021.274.162.66 96.294968
Glass73.570.1612.591.61 0.041.294.132.52 95.904968
Glass73.560.1212.211.73 0.051.244.322.84 96.074968
Glass73.330.0912.561.67 0.071.264.072.59 95.644968
Glass73.250.1112.571.68 0.041.184.132.70 95.674968
Glass73.150.1812.801.66 0.031.354.162.76 96.104968
Glass73.010.1312.401.72 0.011.214.022.65 95.154968
Glass72.730.1412.491.64 0.071.244.212.65 95.164968
Glass72.640.2812.852.48 0.391.764.262.54 97.194968
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.

 

References

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.

968: Pilcher, J.R., Hall, V.A. and McCormac, F.G. (1996) An outline tephrochronology for the Holocene of the north of Ireland. Journal of Quaternary Science  11 (6), 485-494..

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 22/10/2020 at 11:00:04 local time, Edinburgh, Scotland, UK.