Vedde Tephra at Dimnamyra

This search has found 24 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.

Geochemistry

To download this data as a tab delimited file click here:

	SiO₂	TiO₂	Al₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	Total	EP	Ref
Glass	72.52	0.20	13.63	3.75	0.17	0.22	1.16	3.37	3.53	98.54	21	2234
Glass	72.13	0.24	13.81	3.54	0.10	0.21	1.46	4.39	3.40	99.27	21	2234
Glass	72.03	0.31	13.74	3.94	0.07	0.12	1.30	4.28	3.36	99.15	21	2234
Glass	71.86	0.34	13.65	3.98	0.10	0.28	1.33	3.93	3.46	98.93	21	2234
Glass	71.82	0.27	13.57	3.92	0.19	0.16	1.33	4.30	3.31	98.87	21	2234
Glass	71.76	0.25	13.71	3.78	0.20	0.24	1.27	4.52	3.35	99.07	21	2234
Glass	71.26	0.31	13.76	4.00	0.17	0.28	1.37	4.39	3.34	98.88	21	2234
Glass	71.19	0.31	13.86	3.86	0.10	0.11	1.30	4.19	3.43	98.34	21	2234
Glass	71.15	0.18	13.65	3.87	0.15	0.21	1.36	4.54	3.43	98.53	21	2234
Glass	70.80	0.29	13.72	3.84	0.13	0.32	1.30	4.18	3.49	98.06	21	2234
Glass	69.17	0.22	12.92	3.82	0.21	0.12	1.34	4.58	3.61	95.99	21	2234
Glass	67.87	0.26	12.97	3.64	0.14	0.23	1.29	3.84	2.76	93.01	21	2234
Glass	67.56	0.21	12.48	3.68	0.19	0.10	1.26	4.22	3.54	93.25	21	2234
Glass	67.22	0.33	12.42	3.66	0.13	0.28	1.28	4.60	3.31	93.22	21	2234
Glass	54.97	2.76	13.15	10.90	0.24	3.24	6.97	2.92	1.54	96.70	21	2234
Glass	54.50	2.92	13.26	11.17	0.19	3.63	7.49	2.88	1.32	97.36	21	2234
Glass	52.20	3.26	13.44	12.21	0.25	3.90	7.76	3.05	1.32	97.38	21	2234
Glass	51.88	3.52	12.92	12.80	0.22	4.19	8.29	2.26	1.10	97.20	21	2234
Glass	51.59	3.19	12.69	12.34	0.20	4.14	8.15	3.11	1.20	96.61	21	2234
Glass	49.98	3.90	12.90	13.66	0.19	4.87	9.04	2.23	0.90	97.67	21	2234
Glass	47.71	4.13	12.71	14.41	0.17	4.96	9.74	1.76	0.76	96.34	21	2234
Glass	47.04	4.29	12.62	14.92	0.22	5.21	9.89	2.33	0.66	97.18	21	2234
Glass	47.02	4.38	12.47	14.57	0.22	5.32	10.00	1.79	0.72	96.48	21	2234
Glass	46.67	4.23	12.74	15.37	0.21	5.19	9.93	2.07	0.69	97.10	21	2234
FeO: total iron is represented as FeO *original totals for normalised data (where applicable)

Instrument Conditions

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

Analysis Conditions (EP):	21
Instrument:	ARL-SEMQ Dept. of Earth Science, University of Bergen)
Beam Current:	10 nA
Acc. Volt:	15 kV
Sample:	Mounted in epoxy resin and ground and polished
Correction:
Comments:	Counting time of 60 s on peak for Al, Si,Ca and Fe. The counting time for Na, Mg, Ti, K and Mnwas 30 s on peak and 5 s on background on each side ofthe peak. To reduce the effect of Na loss, Na was analysed first.

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.

2234: Koren, J.H., Svendsen, J.I., Mangerud, J. and Furnes, H. (2008) The Dimna Ash - A 12.8 C-14 ka-old volcanic ash in Western Norway. Quaternary Science Reviews 27, 85-94.

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 19/4/2024 at 22:58:20 local time, Edinburgh, Scotland, UK.