Dead Island Bog, County Londonderry, Northern Ireland

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This page contains the results of your search. It is divided into two sections. The first contains information about any tephra layers present at the site and the second part contains details about the source references and the date and time of the search.

Your search has found 7 Tephra layers at Dead Island Bog

Site Type Area Latitude LongitudeGrid reference Altitude (m)
Terrestrial Northern Ireland, County Londonderry 54.8869°N 6.5498°W C931053 41
Profile Tephra Layer
NoNameTotal Profile Depth (m)TypeCorrelated name1Local name2Tephra Depth (m)CommentsGeochemical dataRef
311 Dead Island Centre Core 4.00 russian corer
Hekla 1947 Tephra 0.070 - 0.080*CryptotephraView Data2225
Hekla 1510 Tephra 0.200 - 0.210*CryptotephraView Data2225
860 AD Layer part A Tephra 0.440 - 0.450*CryptotephraView Data2225
860 AD Layer part B Tephra 0.440 - 0.450View Data2225
GA4-85 Tephra 0.440 - 0.450*CryptotephraView Data2225
OMH-185 (Microlite) Tephra 2.190 - 2.200*CryptotephraView Data2225
Hekla 4 Tephra 3.750 - 3.760*CryptotephraView Data2225


*Note that the Tephra layer depth of a cryptotephra does not indicate the thickness of the layer, as in a visible tephra tephra layer. The thickness indicates the spread of the tephra shards in the sediment or sometimes the top and bottom depths are the same (i.e. no apparent thickness).

1Correlated tephra name means that the tephra deposit has been correlated with a tephra horizon found at multiple sites (e.g. Hekla 4). Of course, these correlations could be reinterpreted and care needs to be taken.

2Local tephra name is the name given by the researchers for the tephra found at the site, this is often a mixture of a site code/name and the depth of the tephra. Not all tephra layers in Tephrabase have a local name, but more or being added. This is independent of any correlations to other tephra deposits.


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 preceding each reference matches the Ref number on the data table above.

2225: Swindles, G.  2006  Reconstructions of Holocene climate change from peatland in the north of Ireland. Unpublished PhD thesis, Queen's Unversity, Belfast,

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 2/3/2024 at 22:30:43 local time, Edinburgh, Scotland, UK.