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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.
|Site Type||Area||Latitude||Longitude||Altitude (m)|
|No||Name||Total Profile Depth (m)||Type||Correlated name1||Local name2||Tephra Depth (m)||Comments||Geochemical data||Ref|
|860 AD Layer part B Tephra|
|Jam-1||0.280 - 0.320||Colourless, pumiceous and highly vesicular glass shards, the median diameter of the shards being 30 Ám (*Cryptotephra)||View Data||1624|
|Glen Garry Tephra|
|Jam-2||0.860 - 0.940||Mainly colourless vesicular bubble wall shards, also some rare brownish shards (not analysed) (*Cryptotephra)||View Data||1624|
|OMH-185 (Microlite) Tephra|
|Jam-3||1.020 - 1.100||Colourless, highly vesicular, bubble wall and non-vesicular angular glass shards. Maximum length 100 Ám, median <45 Ám. 60% of the shards have characteristic feldspar microlite crystals up to 20 Ám long (*Cryptotephra)||View Data||1624|
|Hekla 3 Tephra|
|Jam-4||1.140 - 1.220||Shards colourless, pumiceous to highly vesicular and bubble-wall shaped. Median 50 Ám, maximum 90 Ám. A few greenish shards, rare brownish and one feldspar crystal (*Cryptotephra)||View Data||1624|
|Hekla 4 Tephra|
|Jam-5||1.860 - 1.940||Shards consist of colourless tubular pumice, pumiceous and vesicular glass shards. Mean diameter 45 Ám and largest 100 Ám. (*Cryptotephra)||View Data||1624|
|Lairg Tephra B|
|Jam-6||2.340 - 2.380||Colourless and vesicular shards, with a medium grain size of ca. 50 Ám (*Cryptotephra)||View Data||1624|
|Lairg Tephra A|
|Jam-7||2.380 - 2.420||Shards of colourless vesicular glass, with a medium diameter of ca. 50 Ám (*Cryptotephra)||View Data||1624|
|JAM-8||Jam-8||2.700 - 2.740||*Cryptotephra||1624|
*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 preceeding each reference matches the Ref number on the data table above.
1624: van den Bogaard, C. and Schminke, H.U. 2002 Linking the North Atlantic to central Europe: a high-resolution Holocene tephrochronological record from northern Germany. Journal of Quaternary Science 17, 3-20..
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 03:52:52 local time, Edinburgh, Scotland, UK.