All analyses of the Lairg Tephra B

This search has found 108 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 analyses 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. You should always refer to the original sources to get the full context of the data presented here.

FeO: total iron is represented as FeO
*original totals for normalised data (where applicable)
Site	Phase	SiO₂	TiO₂	Al₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	Cl	F	SO₂	Total	EP	Ref
An Loch Mór, Inis Oírr (Ireland)	glass	69.53	0.58	14.08	3.29	0.00	0.41	1.19	4.29	4.16					97.53	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	69.52	0.36	13.23	3.15	0.06	0.34	1.10	4.71	4.36					96.83	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	69.38	0.22	13.69	2.39	0.01	0.20	0.75	4.78	4.53					95.95	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	69.18	0.19	13.59	2.52	0.06	0.27	0.91	4.59	4.47					95.78	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	69.17	0.21	13.38	2.06	0.04	0.14	0.57	4.34	4.65					94.56	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	69.08	0.23	12.91	2.32	0.03	0.19	0.73	4.01	4.48					93.98	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	69.08	0.22	13.35	2.12	0.05	0.15	0.58	4.54	4.17					94.26	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	69.05	0.15	13.33	2.05	0.00	0.15	0.66	4.49	4.61					94.49	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	69.02	0.14	13.34	2.08	0.02	0.13	0.60	4.30	4.52					94.15	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.89	0.18	13.50	2.17	0.02	0.14	0.63	4.61	4.39					94.53	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.88	0.16	13.26	1.94	0.01	0.13	0.61	4.33	4.27					93.59	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.87	0.16	13.60	2.13	0.22	0.15	0.71	4.29	4.53					94.66	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.77	0.25	13.60	2.24	0.09	0.18	0.68	4.73	4.39					94.93	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.74	0.15	13.39	2.10	0.02	0.11	0.70	4.32	4.53					94.06	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.70	0.44	14.12	2.85	0.04	0.33	1.05	4.37	4.49					96.39	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.65	0.17	13.42	2.03	0.00	0.14	0.66	4.28	4.35					93.70	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.63	0.29	13.70	2.35	0.11	0.18	0.80	4.66	4.45					95.17	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.63	0.23	14.08	2.58	0.00	0.22	0.83	4.87	4.25					95.69	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.30	0.22	13.50	2.10	0.02	0.15	0.73	4.47	4.12					93.61	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	68.24	0.19	13.10	2.31	0.03	0.15	0.61	4.27	4.39					93.29	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	67.15	0.30	13.04	2.80	0.00	0.28	0.92	4.21	4.49					93.19	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	67.08	0.27	13.71	2.31	0.07	0.18	0.85	4.39	4.37					93.23	2	1802
An Loch Mór, Inis Oírr (Ireland)	glass	66.54	0.28	14.14	2.25	0.04	0.22	1.32	4.91	3.86					93.56	2	1802
Claraghmore Lake (Northern Ireland)	glass	71.56	0.29	14.61	2.18	0.06	0.24	1.04	5.15	4.62	0.04				99.78	16	4505
Claraghmore Lake (Northern Ireland)	glass	71.13	0.24	14.25	2.32	0.05	0.17	0.91	5.07	4.77	0.04				98.97	16	4505
Claraghmore Lake (Northern Ireland)	glass	71.04	0.19	13.90	2.22	0.04	0.14	0.73	5.27	4.73	0.03				98.29	16	4505
Claraghmore Lake (Northern Ireland)	glass	70.30	0.19	13.38	2.27	0.05	0.15	0.74	5.27	4.51	0.03				96.90	16	4505
Claraghmore Lake (Northern Ireland)	glass	70.27	0.20	13.68	2.23	0.06	0.14	0.76	5.20	4.56	0.02				97.10	16	4505
Claraghmore Lake (Northern Ireland)	glass	70.07	0.20	13.80	2.25	0.06	0.11	0.71	5.06	4.65	0.02				96.93	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.99	0.39	13.85	2.86	0.07	0.29	1.15	5.07	4.30	0.05				98.02	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.91	0.26	13.92	2.70	0.08	0.26	1.09	5.21	4.17	0.03				97.64	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.89	0.20	13.65	2.19	0.08	0.18	0.65	5.40	4.47	0.02				96.73	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.87	0.19	13.00	2.24	0.06	0.14	0.72	5.38	4.58	0.02				96.19	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.86	0.21	13.55	1.99	0.04	0.15	0.78	5.10	4.51	0.02				96.22	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.66	0.19	13.53	2.18	0.08	0.13	0.74	5.35	4.57	0.02				96.46	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.64	0.21	13.73	1.97	0.08	0.17	0.70	5.23	4.58	0.01				96.31	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.56	0.19	13.39	2.04	0.05	0.12	0.66	5.22	4.60	0.03				95.86	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.52	0.31	14.23	2.67	0.05	0.27	1.21	5.15	4.55	0.04				97.99	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.49	0.34	14.36	2.95	0.09	0.37	1.35	5.24	4.26	0.05				98.49	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.30	0.50	14.32	3.43	0.09	0.43	1.34	5.01	4.27	0.10				98.79	16	4505
Claraghmore Lake (Northern Ireland)	glass	69.03	0.22	13.94	2.26	0.07	0.19	0.92	5.27	4.48	0.03				96.42	16	4505
Claraghmore Lake (Northern Ireland)	glass	68.98	0.32	14.10	3.27	0.09	0.65	1.61	4.96	4.23	0.07				98.28	16	4505
Claraghmore Lake (Northern Ireland)	glass	68.84	0.42	14.86	3.44	0.05	0.45	1.45	5.24	4.20	0.08				99.01	16	4505
Claraghmore Lake (Northern Ireland)	glass	68.04	0.23	13.64	2.40	0.06	0.18	0.84	5.25	4.41	0.03				95.08	16	4505
Fallahogy Bog (Northern Ireland)	glass	73.21	0.15	12.76	1.66		0.07	1.26	4.17	2.72					95.99	4	968
Fallahogy Bog (Northern Ireland)	glass	71.08	0.29	14.39	2.97	0.08	0.41	1.41	4.58	4.19					99.39	2	968
Fallahogy Bog (Northern Ireland)	glass	70.72	0.13	13.85	2.07	0.01	0.16	0.69	4.58	4.46					96.69	2	968
Fallahogy Bog (Northern Ireland)	glass	70.19	0.15	13.49	2.09	0.05	0.12	0.70	4.17	4.13					95.10	2	968
Fallahogy Bog (Northern Ireland)	glass	70.08	0.31	13.90	2.83	0.06	0.38	1.25	4.30	4.16					97.27	2	968
Fallahogy Bog (Northern Ireland)	glass	69.68	0.28	14.15	2.26		0.16	0.78	5.04	4.98					97.32	4	968
Fallahogy Bog (Northern Ireland)	glass	69.65	0.29	14.48	2.49		0.18	1.10	4.99	4.81					97.99	4	968
Fallahogy Bog (Northern Ireland)	glass	69.63	0.13	13.41	2.08	0.06	0.14	0.63	4.69	4.21					94.98	2	968
Fallahogy Bog (Northern Ireland)	glass	69.56	0.25	14.21	2.25		0.14	0.78	4.98	5.10					97.29	4	968
Fallahogy Bog (Northern Ireland)	glass	69.54	0.35	14.84	2.81		0.29	1.20	4.89	5.08					99.01	4	968
Fallahogy Bog (Northern Ireland)	glass	69.53	0.28	14.54	2.33		0.16	0.88	5.28	4.68					97.66	4	968
Fallahogy Bog (Northern Ireland)	glass	69.52	0.29	14.52	2.39		0.23	0.88	5.34	4.39					97.56	4	968
Fallahogy Bog (Northern Ireland)	glass	69.47	0.30	14.46	2.44		0.17	0.95	4.94	4.98					97.71	4	968
Fallahogy Bog (Northern Ireland)	glass	69.04	0.26	13.95	2.28		0.16	0.82	5.09	4.86					96.47	4	968
Fallahogy Bog (Northern Ireland)	glass	68.75	0.24	14.10	2.26		0.15	0.72	4.83	5.17					96.22	4	968
Fallahogy Bog (Northern Ireland)	glass	68.66	0.18	14.01	2.21		0.13	0.73	4.92	4.60					95.43	4	968
Fallahogy Bog (Northern Ireland)	glass	68.58	0.33	14.89	2.96		0.35	1.49	5.11	4.44					98.15	4	968
Fallahogy Bog (Northern Ireland)	glass	68.45	0.31	14.67	2.59		0.22	1.16	5.05	4.83					97.29	4	968
Fallahogy Bog (Northern Ireland)	glass	68.44	0.25	13.79	2.28		0.12	0.70	4.95	5.19					95.71	4	968
Fallahogy Bog (Northern Ireland)	glass	68.26	0.29	14.14	2.27		0.15	0.75	4.83	5.14					95.76	4	968
Fallahogy Bog (Northern Ireland)	glass	68.15	0.36	14.54	2.59		0.28	1.10	5.12	4.07					96.23	4	968
Fallahogy Bog (Northern Ireland)	glass	67.77	0.40	14.56	3.31		0.82	1.95	5.01	4.05					97.87	4	968
Fallahogy Bog (Northern Ireland)	glass	67.47	0.39	14.94	3.20		0.39	2.77	5.14	4.46					98.76	4	968
Fallahogy Bog (Northern Ireland)	glass	67.14	0.42	14.97	3.43		0.69	2.28	4.96	4.30					98.20	4	968
Jardelunder Moor (Germany)	glass	72.00	0.13	14.66	2.01	0.03	0.13	0.77	5.50	4.79	0.00	0.19	0.29	0.04	97.70	25	1624
Jardelunder Moor (Germany)	glass	71.97	0.07	14.57	2.17	0.10	0.18	0.81	5.50	4.64	0.00	0.19	0.24	0.00	99.33	25	1624
Jardelunder Moor (Germany)	glass	71.95	0.36	14.48	2.17	0.10	0.18	0.73	5.38	4.64	0.00	0.23	0.16	0.01	97.42	25	1624
Jardelunder Moor (Germany)	glass	71.89	0.25	14.61	2.14	0.00	0.20	0.67	5.60	4.66	0.00	0.22	0.26	0.03	97.78	25	1624
Jardelunder Moor (Germany)	glass	71.78	0.23	14.29	2.18	0.16	0.16	0.73	5.68	4.78	0.00	0.25	0.29	0.00	98.01	25	1624
Jardelunder Moor (Germany)	glass	71.71	0.19	14.60	2.31	0.06	0.22	0.84	5.63	4.44	0.00	0.17	0.31	0.02	97.58	25	1624
Jardelunder Moor (Germany)	glass	71.63	0.26	14.66	2.28	0.07	0.20	0.77	5.62	4.51	0.00	0.18	0.27	0.01	98.49	25	1624
Jardelunder Moor (Germany)	glass	71.61	0.32	14.81	2.14	0.09	0.19	0.79	5.53	4.53	0.00	0.25	0.34	0.04	97.80	25	1624
Jardelunder Moor (Germany)	glass	71.27	0.36	14.65	2.14	0.06	0.25	0.94	5.79	4.54	0.00	0.24	0.30	0.00	98.14	25	1624
Jardelunder Moor (Germany)	glass	70.97	0.32	15.09	2.13	0.05	0.25	0.97	5.69	4.55	0.00	0.23	0.25	0.05	97.71	25	1624
Jardelunder Moor (Germany)	glass	70.91	0.29	14.88	2.54	0.00	0.26	0.99	5.65	4.48	0.00	0.27	0.18	0.06	97.62	25	1624
Lairg AG4 (Scotland)	glass	73.95	0.16	12.45	2.85	0.11	0.04	0.42	4.58	4.70					99.26	2	853
Lairg AG4 (Scotland)	glass	73.82	0.12	11.98	2.96	0.06	0.04	0.43	4.57	4.72					98.69	2	853
Lairg AG4 (Scotland)	glass	73.51	0.19	12.83	2.92	0.09	0.05	0.43	4.67	4.82					98.86	2	853
Lairg AG4 (Scotland)	glass	71.33	0.14	11.89	2.83	0.05	0.05	0.38	4.41	4.82					95.90	2	853
Lairg AG4 (Scotland)	glass	70.16	0.19	13.60	2.27	0.08	0.10	0.60	4.47	4.64					96.10	2	853
Malham Moss (England)	glass	70.77	0.19	13.87	2.15	0.12	0.13	0.71	4.93	4.51					97.38	24	4505
Malham Moss (England)	glass	70.72	0.20	13.45	2.14	0.04	0.18	0.72	4.61	4.40					96.45	24	4505
Malham Moss (England)	glass	69.43	0.17	13.45	2.14	0.03	0.17	0.64	4.68	4.41					95.13	24	4505
Malham Moss (England)	glass	68.84	0.24	14.53	2.39	0.05	0.25	0.92	4.83	4.23					96.28	24	4505
Sluggan Bog (Northern Ireland)	glass	71.77	0.23	14.65	2.19		0.13	0.68	5.49	4.62					99.75	4	968
Sluggan Bog (Northern Ireland)	glass	71.72	0.25	14.65	2.17		0.16	0.68	5.16	5.18					99.98	4	968
Sluggan Bog (Northern Ireland)	glass	71.41	0.24	15.10	2.24		0.16	0.69	5.42	4.69					99.95	4	968
Sluggan Bog (Northern Ireland)	glass	71.20	0.22	14.61	2.36		0.14	0.68	5.56	4.62					99.39	4	968
Sluggan Bog (Northern Ireland)	glass	70.88	0.27	14.51	2.23		0.15	0.67	5.50	4.74					98.94	4	968
Sluggan Bog (Northern Ireland)	glass	70.76	0.24	14.60	2.23		0.15	0.70	5.66	4.36					98.69	4	968
Sluggan Bog (Northern Ireland)	glass	70.69	0.23	14.56	2.20		0.15	0.67	5.44	4.49					98.41	4	968
Sluggan Bog (Northern Ireland)	glass	70.42	0.23	14.62	2.23		0.17	0.67	5.17	4.43					97.93	4	968
Sluggan Bog (Northern Ireland)	glass	70.36	0.22	14.50	2.20		0.15	0.67	5.31	4.66					98.08	4	968
Sluggan Bog (Northern Ireland)	glass	70.32	0.28	14.42	2.21		0.16	0.71	5.43	4.36					97.90	4	968
Sluggan Bog (Northern Ireland)	glass	70.28	0.28	15.14	2.55		0.21	0.97	5.31	4.47					99.20	4	968
Sluggan Bog (Northern Ireland)	glass	70.12	0.23	14.39	2.23		0.18	0.62	5.36	4.70					97.82	4	968
Sluggan Bog (Northern Ireland)	glass	69.98	0.24	14.74	2.34		0.20	0.74	5.50	4.59					98.32	4	968
Sluggan Bog (Northern Ireland)	glass	69.92	0.25	14.19	2.09		0.14	0.71	4.64	5.28					97.21	4	968
Sluggan Bog (Northern Ireland)	glass	69.83	0.23	14.46	2.19		0.15	0.67	5.26	4.52					97.30	4	968
Sluggan Bog (Northern Ireland)	glass	69.35	0.23	14.32	2.13		0.17	0.70	4.17	5.86					96.93	4	968
Sluggan Bog (Northern Ireland)	glass	69.33	0.24	14.35	2.16		0.16	0.64	4.64	5.95					97.47	4	968
Sluggan Bog (Northern Ireland)	glass	68.55	0.21	14.86	2.22		0.16	0.69	5.69	4.54					96.92	4	968
Tiefer See (Germany)	glass	69.44	0.20	13.94	2.28	0.10	0.15	0.63	5.31	4.22	0.00	0.21	0.00		96.27	26	4822
Tiefer See (Germany)	glass	69.18	0.17	13.78	2.05	0.09	0.12	0.57	5.10	4.37	0.00	0.20	0.00		95.43	26	4822

Instrument Conditions

These analyses were carried out under the following electron microprobe conditions.

Please refer to papers for full details of the instrument conditions, standards etc used to create these analyses
EP	Instrument	Beam current (nA)	Beam voltage (kV)	Correction	Sample
2	Cambridge Instruments Microscan V (University of Edinburgh)	15	20	ZAF	Thin section mounted in araldite then ground and polished
4	Jeol 733 Superprobe (Queens University, Belfast)	10	15	ZAF	Thin section mounted in araldite then ground and polished
16	Camca SX100 (University of Edinburgh)	2	15	PAP	Thin section mounted in araldite then ground and polished
24	JEOL JXA8230 (University of Leeds)	10	15		Thin section mounted in araldite then ground and polished
25	Cameca SX-50 (GEOMAR, Kiel)	6	15
26	JEOL JXA-8230 microprobe (German Research Centre for Geosciences, GFZ)	10	15		Embedded in Araldite 2020 resin in a single-hole-stub, then sectioned and polished by hand on wet silicon carbide paper

References

The data on this page is from the following source(s). If you use this data please acknowledge the source of the data. he number preceeding each reference matches the Ref number on the data table above.

1802 - Chambers, F.M., Daniell, J.R.G., Hunt, J.B., Molloy, K. and O'Connell, M. (2004) Tephrostratigraphy of An Loch Mór, Inis Oírr, western Ireland: implications for Holocene tephrochronology in the northeastern Atlantic region. Holocene 14, 703-720.

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

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..

4505 - Watson, E.J., Swindles, G.T., Lawson, I.T. and Savov, I.P. (2016) Do peatlands or lakes provide the most comprehensive distal tephra records?. Quaternary Science Reviews 139, 110-128.

4822 - Wulf, S. Dräger, N. Ott, F. Serb, J. Appelt, O. Guđmundsdóttir, E. van den Bogaard, C. Slowinski, M. Laszkiewicz, M. and Brauder, A. (2016) Holocene tephrostratigraphy of varved sediment records from Lakes Tiefer See (NE Germany) and Czechowskie (N Poland). Journal of Quaternary Science 32, 1-14.

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..

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 5/7/2025 at 07:15:28 local time, Edinburgh, Scotland, UK.