Mongan, County Offaly, Ireland

Your search has found 3 tephra layers at Mongan

Site Type	Area	Latitude	Longitude	Grid reference	Altitude (m)
Terrestrial	Ireland, County Offaly	53.3272°N	7.9493°W	N034308	60

*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.
Profile				Tephra Layer
No	Name	Profile Depth (m)	Type	Correlated name¹	Local name²	Tephra Depth (m)	Comments	Geochemical data	Ref
240	Mongan	1.00	2 metre long, 10cm diameter plastic tube
				Hekla 1947 Tephra	Mongan 6-7	0.060 - 0.070	*Cryptotephra		1915
				PMG-5 Tephra	Mongan 17-18	0.170 - 0.180	*Cryptotephra		1915
				Hekla 1104 Tephra	Mongan 42-43	0.420 - 0.430	*Cryptotephra		1915

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

1915: Hall, V. A. and Mauquoy, D. 2005 Tephra-dated climate- and human-impact studies during the last 1500 years from a raised bog in central Ireland. Holocene 15, 1086-1093.

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 4/7/2025 at 18:02:05 local time, Edinburgh, Scotland, UK.