Station Hill, Altnabreac, Caithness, Scotland

Your search has found 11 tephra layers at Station Hill, Altnabreac

Site Type	Area	Latitude	Longitude	Grid reference	Altitude (m)
Terrestrial	Scotland, Caithness	58.3800°N	3.7000°W	ND001459	160

*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
4	Profile 1	1.32	Peat section
				Hekla 4 Tephra	Altnabreac Tephra	0.690 - 0.710	*Cryptotephra	View Data	197
5	Profile 2	0.98	Monolith - Section
				Glen Garry Tephra		0.460 - 0.510	*Cryptotephra	View Data	202
				Hekla 4 Tephra		0.960 - 0.960	*Cryptotephra	View Data	201
				Hekla 4 Tephra		0.960 - 0.960	*Cryptotephra	View Data	853
6	Profile 3	1.23	Monolith - Section
				Hekla 4 Tephra		0.950 - 0.950	*Cryptotephra	View Data	201
				Hekla 4 Tephra		0.950 - 0.950	*Cryptotephra	View Data	853
7	Profile 4	1.12	Monolith - Section
				Hekla 4 Tephra		0.970 - 0.970	*Cryptotephra	View Data	201
				Hekla 4 Tephra		0.970 - 0.970	*Cryptotephra	View Data	853
8	Profile 5	1.37	Monolith - Section
				Hekla 4 Tephra		1.020 - 1.020	*Cryptotephra	View Data	201
				Hekla 4 Tephra		1.020 - 1.020	*Cryptotephra	View Data	853
9	Profile 6	n/a	Monolith - Section
				Hekla 4 Tephra		n/a	*Cryptotephra	View Data	853

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.

197: Dugmore, A.J. 1989 Icelandic volcanic ash in Scotland. Scottish Geographical Magazine 105(3), 168-172.

853: Dugmore, A.J., Larsen, G, and Newton, A.J. 1995 Seven tephra isochrones in Scotland. The Holocene 5/3, 257-266.

201: Dugmore, A.J., Larsen, G., Newton, A.J., and Sugden, D.E. 1992 Geochemical stability of fine-grained silicic tephra layers in Iceland and Scotland. Journal of Quaternary Science 7, 173-183.

202: Dugmore, A.J., and Newton, A.J. 1992 Thin tephra layers in peat revealed by X-radiography. Journal of Archaeological Sciences 19, 163-170.

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 19:16:00 local time, Edinburgh, Scotland, UK.