All analyses of the Lairg Tephra A

This search has found 172 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 FeOMnOMgO CaO Na2O K2OP2O5ClFSO2Total EP Ref
An Loch Mór, Inis Oírr (Ireland)glass74.670.1312.551.640.010.051.273.922.7096.9421802
An Loch Mór, Inis Oírr (Ireland)glass73.340.0912.281.410.050.041.293.812.5694.8721802
An Loch Mór, Inis Oírr (Ireland)glass73.340.0912.301.400.050.051.363.742.6194.9421802
An Loch Mór, Inis Oírr (Ireland)glass73.050.0711.841.380.040.041.163.482.9093.9621802
An Loch Mór, Inis Oírr (Ireland)glass73.020.0112.121.560.030.041.243.652.6294.2921802
An Loch Mór, Inis Oírr (Ireland)glass72.970.0312.071.520.070.051.213.702.7394.3521802
An Loch Mór, Inis Oírr (Ireland)glass72.960.0012.061.390.090.061.263.662.5794.0521802
An Loch Mór, Inis Oírr (Ireland)glass72.920.1312.182.780.050.031.233.592.6295.5321802
An Loch Mór, Inis Oírr (Ireland)glass72.910.1012.201.390.050.051.183.742.5594.1721802
An Loch Mór, Inis Oírr (Ireland)glass72.860.0612.281.490.040.071.213.622.6194.2421802
An Loch Mór, Inis Oírr (Ireland)glass72.790.0611.971.530.330.041.103.562.5493.9221802
An Loch Mór, Inis Oírr (Ireland)glass72.730.0612.131.480.040.051.313.532.5893.9121802
An Loch Mór, Inis Oírr (Ireland)glass72.670.0512.041.420.050.071.183.392.7993.6621802
An Loch Mór, Inis Oírr (Ireland)glass72.630.0512.281.500.080.061.303.482.7094.0821802
An Loch Mór, Inis Oírr (Ireland)glass72.490.0611.941.400.040.041.153.502.5593.1721802
An Loch Mór, Inis Oírr (Ireland)glass72.410.0511.651.590.110.061.253.312.7293.1521802
An Loch Mór, Inis Oírr (Ireland)glass72.380.0712.151.400.030.051.313.692.6793.7521802
An Loch Mór, Inis Oírr (Ireland)glass72.260.1012.141.580.050.051.183.642.7093.7021802
An Loch Mór, Inis Oírr (Ireland)glass72.070.0312.061.390.060.051.183.762.8393.4321802
Ballynahone (Northern Ireland)glass73.510.1312.251.69 0.041.244.222.5095.5941561
Ballynahone (Northern Ireland)glass73.100.1412.591.73 0.041.254.152.9995.9941561
Ballynahone (Northern Ireland)glass72.970.1412.371.70 0.041.344.232.6495.4341561
Ballynahone (Northern Ireland)glass72.880.1612.181.71 0.061.284.252.8295.3241561
Claraghmore Bog (Northern Ireland)glass73.130.1711.761.560.030.140.933.903.710.0495.37164505
Claraghmore Bog (Northern Ireland)glass73.040.0812.021.570.070.001.263.502.830.0294.38164505
Claraghmore Bog (Northern Ireland)glass60.601.1614.818.940.271.825.164.301.550.4399.03164505
Claraghmore Bog (Northern Ireland)glass50.462.6713.1512.200.205.8010.112.840.480.3198.22164505
Claraghmore Lake (Northern Ireland)glass75.970.0912.691.820.060.051.234.602.710.0399.24164505
Claraghmore Lake (Northern Ireland)glass75.710.0812.641.590.080.041.374.432.800.0198.74164505
Claraghmore Lake (Northern Ireland)glass75.350.0712.041.700.030.041.324.262.850.0197.68164505
Claraghmore Lake (Northern Ireland)glass74.940.0812.061.650.070.041.344.492.680.0197.38164505
Claraghmore Lake (Northern Ireland)glass74.740.0712.101.780.060.021.314.112.810.0197.01164505
Claraghmore Lake (Northern Ireland)glass74.530.0711.871.610.050.071.284.252.720.0196.47164505
Claraghmore Lake (Northern Ireland)glass74.530.0812.081.740.070.011.274.142.670.0196.59164505
Claraghmore Lake (Northern Ireland)glass74.470.0912.361.710.070.031.364.242.680.0297.02164505
Claraghmore Lake (Northern Ireland)glass74.380.0613.601.530.060.021.634.612.520.0198.43164505
Claraghmore Lake (Northern Ireland)glass74.350.0712.191.510.080.041.324.072.760.0196.40164505
Claraghmore Lake (Northern Ireland)glass74.090.0812.591.740.070.011.394.242.740.0196.94164505
Claraghmore Lake (Northern Ireland)glass74.020.0812.241.640.060.031.164.442.780.0196.47164505
Claraghmore Lake (Northern Ireland)glass73.830.0712.461.620.040.041.274.052.840.0396.24164505
Claraghmore Lake (Northern Ireland)glass73.650.0812.321.730.070.031.274.312.630.0196.11164505
Claraghmore Lake (Northern Ireland)glass73.560.0812.431.630.050.051.274.312.790.0296.19164505
Claraghmore Lake (Northern Ireland)glass73.470.0912.291.510.050.041.244.192.700.0295.61164505
Claraghmore Lake (Northern Ireland)glass73.450.0812.131.460.050.021.344.402.720.0495.69164505
Claraghmore Lake (Northern Ireland)glass73.440.0712.251.610.070.031.274.092.580.0395.45164505
Claraghmore Lake (Northern Ireland)glass73.180.0812.201.460.050.041.284.202.720.0195.22164505
Claraghmore Lake (Northern Ireland)glass73.140.0911.991.540.050.031.324.212.760.0295.14164505
Degerö Stormyr (Sweden)glass76.080.0712.371.750.060.011.254.392.660.0098.64164505
Degerö Stormyr (Sweden)glass75.780.0712.101.730.050.031.244.382.710.0198.12164505
Degerö Stormyr (Sweden)glass75.690.0712.671.650.070.061.294.582.760.0198.85164505
Degerö Stormyr (Sweden)glass75.660.0712.361.810.060.041.344.552.690.0198.59164505
Degerö Stormyr (Sweden)glass75.450.0712.551.630.070.041.284.622.550.0198.27164505
Degerö Stormyr (Sweden)glass75.450.0712.581.460.060.031.304.312.610.0397.90164505
Degerö Stormyr (Sweden)glass75.400.0712.331.510.060.021.344.532.650.0297.92164505
Degerö Stormyr (Sweden)glass75.390.0812.091.700.060.011.254.282.660.0297.53164505
Degerö Stormyr (Sweden)glass75.360.0812.421.680.070.041.314.422.730.0198.11164505
Degerö Stormyr (Sweden)glass75.350.0812.811.550.060.031.364.312.740.0198.29164505
Degerö Stormyr (Sweden)glass75.340.0912.311.670.060.041.274.482.610.0197.88164505
Degerö Stormyr (Sweden)glass75.320.0712.391.820.060.041.294.572.950.0298.54164505
Degerö Stormyr (Sweden)glass75.300.0812.461.670.060.021.344.322.730.0297.98164505
Degerö Stormyr (Sweden)glass75.120.0912.411.570.060.061.244.562.660.0197.78164505
Degerö Stormyr (Sweden)glass74.900.0812.571.630.060.041.334.462.700.0197.78164505
Degerö Stormyr (Sweden)glass74.880.0812.341.660.070.001.344.352.660.0197.38164505
Degerö Stormyr (Sweden)glass74.860.0812.641.620.070.051.354.592.840.0298.13164505
Degerö Stormyr (Sweden)glass74.850.0812.301.640.070.041.284.372.600.0097.22164505
Degerö Stormyr (Sweden)glass74.840.0712.381.620.070.041.254.232.780.0297.30164505
Degerö Stormyr (Sweden)glass74.730.0812.161.760.060.041.324.482.750.0297.40164505
Degerö Stormyr (Sweden)glass74.680.0712.521.620.070.041.304.662.700.0297.69164505
Degerö Stormyr (Sweden)glass74.230.0712.271.690.060.031.394.732.640.0297.11164505
Degerö Stormyr (Sweden)glass73.920.0713.471.470.060.041.515.042.330.0197.92164505
Fallahogy Bog (Northern Ireland)glass75.180.1312.301.600.050.011.273.702.7396.962968
Fallahogy Bog (Northern Ireland)glass75.100.0911.861.530.050.021.194.012.5196.362968
Fallahogy Bog (Northern Ireland)glass74.730.1112.171.610.050.041.294.072.6296.702968
Fallahogy Bog (Northern Ireland)glass74.610.0812.221.720.050.031.303.512.7196.232968
Fallahogy Bog (Northern Ireland)glass74.570.1112.361.680.080.041.253.902.7196.692968
Fallahogy Bog (Northern Ireland)glass74.470.0511.951.410.050.011.073.892.9495.832968
Fallahogy Bog (Northern Ireland)glass74.250.0512.001.680.070.031.274.002.5395.882968
Fallahogy Bog (Northern Ireland)glass74.080.0912.551.700.060.051.244.092.6696.502968
Fallahogy Bog (Northern Ireland)glass73.930.1012.291.580.070.031.214.192.7796.172968
Fallahogy Bog (Northern Ireland)glass73.580.0512.511.610.020.051.244.252.5595.862968
Fallahogy Bog (Northern Ireland)glass72.860.1012.431.60 0.041.314.072.6795.074968
Fallahogy Bog (Northern Ireland)glass72.780.1212.571.59 0.091.274.122.7195.264968
Fallahogy Bog (Northern Ireland)glass72.750.1012.791.56 0.041.244.252.6395.364968
Fallahogy Bog (Northern Ireland)glass72.730.1412.671.54 0.051.274.292.7495.444968
Fallahogy Bog (Northern Ireland)glass72.700.1212.591.590.070.041.244.142.6195.102968
Fallahogy Bog (Northern Ireland)glass72.630.1312.571.65 0.051.244.532.6295.414968
Fallahogy Bog (Northern Ireland)glass72.600.1312.651.59 0.071.264.263.3195.864968
Fallahogy Bog (Northern Ireland)glass72.590.1412.861.62 0.041.294.422.6595.604968
Fallahogy Bog (Northern Ireland)glass72.590.1612.821.70 0.041.314.332.6795.624968
Fallahogy Bog (Northern Ireland)glass72.510.1612.571.55 0.071.264.312.6595.064968
Fallahogy Bog (Northern Ireland)glass72.510.1312.511.70 0.051.254.372.6995.214968
Fallahogy Bog (Northern Ireland)glass72.500.1212.571.69 0.041.264.252.8495.264968
Fallahogy Bog (Northern Ireland)glass72.420.1612.841.59 0.041.243.863.6495.794968
Fallahogy Bog (Northern Ireland)glass72.350.1112.561.61 0.051.364.382.6095.014968
Fallahogy Bog (Northern Ireland)glass72.280.1512.731.66 0.031.264.532.6095.234968
Fallahogy Bog (Northern Ireland)glass72.090.1312.501.70 0.051.253.444.2395.384968
Jardelunder Moor (Germany)glass76.750.2312.771.640.120.021.274.272.930.000.070.140.0094.41251624
Jardelunder Moor (Germany)glass76.660.1513.071.560.180.021.294.282.790.000.050.170.0395.11251624
Jardelunder Moor (Germany)glass76.550.2212.991.630.020.031.314.292.950.000.070.210.0195.52251624
Jardelunder Moor (Germany)glass76.440.0613.181.670.150.031.304.322.860.000.100.240.0094.82251624
Jardelunder Moor (Germany)glass76.340.0813.161.760.180.041.434.172.850.000.100.240.0394.48251624
Jardelunder Moor (Germany)glass75.930.0913.651.310.070.011.584.692.680.000.070.280.0195.72251624
Jardelunder Moor (Germany)glass70.870.2914.444.400.150.222.984.262.380.000.070.250.0097.03251624
Jardelunder Moor (Germany)glass70.490.6914.454.540.230.273.133.752.450.000.060.150.0696.81251624
Jardelunder Moor (Germany)glass70.490.5214.744.790.410.242.803.762.240.000.030.010.0696.62251624
Jardelunder Moor (Germany)glass70.320.3814.364.760.330.302.904.312.340.000.040.250.0097.12251624
Jardelunder Moor (Germany)glass70.010.3914.354.860.270.262.934.552.380.000.070.250.0797.61251624
Lairg AG4 (Scotland)glass74.910.1112.771.980.080.021.313.083.3197.572853
Lairg AG4 (Scotland)glass74.900.0613.201.840.120.001.352.863.1497.462853
Lairg AG4 (Scotland)glass74.510.1113.101.900.080.041.363.333.2497.642853
Lairg AG4 (Scotland)glass74.500.1112.921.960.050.021.422.993.6597.612853
Lairg AG4 (Scotland)glass74.410.0812.911.950.080.001.374.263.0398.102853
Lairg AG4 (Scotland)glass74.390.1212.811.900.090.071.254.402.8897.902853
Lairg AG4 (Scotland)glass74.080.1512.871.810.060.041.354.233.3397.922853
Lairg AG4 (Scotland)glass74.030.0712.972.010.110.001.334.173.1397.822853
Lairg AG4 (Scotland)glass73.910.1112.861.810.010.031.344.192.9997.252853
Lairg AG4 (Scotland)glass73.900.1612.971.960.020.031.234.483.0997.842853
Lairg AG4 (Scotland)glass73.870.1412.591.830.070.001.272.973.0895.822853
Lairg AG4 (Scotland)glass73.860.1112.641.850.070.021.274.623.0097.442853
Lairg AG4 (Scotland)glass73.820.1212.481.820.040.031.314.602.6296.842853
Lairg AG4 (Scotland)glass73.800.1312.891.860.070.031.333.663.5597.302853
Lairg AG4 (Scotland)glass73.800.0512.751.950.110.021.354.413.1397.562853
Lairg AG4 (Scotland)glass73.540.1112.881.810.050.041.253.593.3996.662853
Lairg AG4 (Scotland)glass73.450.1212.961.820.080.021.334.273.1197.142853
Lairg AG4 (Scotland)glass73.260.1213.091.930.030.031.293.833.0896.652853
Lairg AG4 (Scotland)glass73.160.1512.882.030.040.021.364.352.6996.692853
Lairg AG4 (Scotland)glass71.500.1913.592.950.160.021.764.242.7597.162853
Lairg AG4 (Scotland)glass70.960.1713.533.000.110.021.964.892.6097.252853
Lairg AG4 (Scotland)glass69.130.1913.833.620.160.032.124.272.4695.822853
Lairg AG4 (Scotland)glass69.000.2413.784.330.140.062.474.872.2997.162853
Lairg AG4 (Scotland)glass66.201.1014.035.840.200.983.164.402.9398.842853
Lake Svartkälsjärn (Sweden)glass73.470.0812.091.500.070.021.284.182.610.0195.00164505
Lake Svartkälsjärn (Sweden)glass73.040.0811.921.610.060.011.173.942.660.0195.00164505
Lake Svartkälsjärn (Sweden)glass71.670.8613.082.870.050.521.914.003.400.4398.79164505
Lake Svartkälsjärn (Sweden)glass70.871.0413.523.860.060.722.404.273.120.21100.00164505
Lake Svartkälsjärn (Sweden)glass70.010.7312.783.620.060.652.414.193.410.1498.01164505
Lake Svartkälsjärn (Sweden)glass69.131.0912.683.660.070.832.714.103.000.2297.00164505
Lake Svartkälsjärn (Sweden)glass68.521.1113.094.440.081.112.874.123.110.2698.70164505
Lake Svartkälsjärn (Sweden)glass67.770.9212.473.960.060.902.684.242.890.2096.00164505
Lake Svartkälsjärn (Sweden)glass65.630.8515.753.070.050.773.684.432.730.1897.16164505
Lake Svartkälsjärn (Sweden)glass60.400.7519.532.160.040.457.505.101.420.8798.00164505
Malham Moss (England)glass75.510.0811.901.570.090.001.203.022.7496.11244505
Malham Moss (England)glass74.850.4912.553.740.200.372.214.252.18100.84244505
Malham Moss (England)glass74.840.0011.861.560.110.011.274.653.0297.31244505
Malham Moss (England)glass74.710.1111.681.670.020.011.293.012.8595.35244505
Malham Moss (England)glass74.690.2012.481.780.000.021.214.062.7597.19244505
Malham Moss (England)glass73.810.0911.971.670.060.081.293.542.6895.19244505
Malham Moss (England)glass73.580.1211.771.570.070.041.303.852.7495.04244505
Malham Moss (England)glass73.160.5912.783.330.230.382.634.122.0599.28244505
Malham Moss (England)glass73.070.1012.741.540.060.051.324.432.7096.01244505
Malham Moss (England)glass72.840.5112.693.710.110.372.264.062.1698.71244505
Sluggan Bog (Northern Ireland)glass73.960.1512.651.66 0.041.324.222.7196.734968
Sluggan Bog (Northern Ireland)glass73.780.0912.441.67 0.051.324.162.7796.274968
Sluggan Bog (Northern Ireland)glass73.680.1412.601.66 0.051.304.092.8196.324968
Sluggan Bog (Northern Ireland)glass73.570.1412.441.65 0.001.334.052.9396.114968
Sluggan Bog (Northern Ireland)glass73.530.1012.581.65 0.061.294.222.5996.034968
Sluggan Bog (Northern Ireland)glass73.430.1712.281.58 0.001.204.022.6895.374968
Sluggan Bog (Northern Ireland)glass73.430.1412.441.72 0.051.254.072.4995.594968
Sluggan Bog (Northern Ireland)glass73.420.1512.621.68 0.041.234.052.6495.834968
Sluggan Bog (Northern Ireland)glass73.370.1012.491.62 0.051.224.112.7795.734968
Sluggan Bog (Northern Ireland)glass73.260.1312.331.65 0.051.243.802.7895.234968
Sluggan Bog (Northern Ireland)glass73.230.1112.491.70 0.071.244.102.7695.714968
Sluggan Bog (Northern Ireland)glass73.210.1512.411.63 0.061.214.112.5595.344968
Sluggan Bog (Northern Ireland)glass73.100.0912.611.73 0.051.274.412.5895.834968
Sluggan Bog (Northern Ireland)glass73.070.1312.631.58 0.041.284.012.8795.614968
Sluggan Bog (Northern Ireland)glass73.000.1212.611.67 0.061.244.342.5295.554968
Sluggan Bog (Northern Ireland)glass72.890.1212.521.70 0.051.354.122.7095.434968
Sluggan Bog (Northern Ireland)glass72.880.1412.641.66 0.051.254.262.6395.514968
Sluggan Bog (Northern Ireland)glass72.820.1212.471.61 0.001.244.242.5695.074968
Sluggan Bog (Northern Ireland)glass72.760.0912.691.62 0.061.284.112.8195.414968
Sluggan Bog (Northern Ireland)glass72.760.1112.591.64 0.061.254.162.5295.094968
Sluggan Bog (Northern Ireland)glass72.600.1412.581.69 0.061.294.042.6795.084968

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 Beam Sample Comments
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

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.

1561 - Hall, V.A. and Pilcher, J.R. (2002) Late-Quaternary Icelandic tephras in Ireland and Great Britain: detection, characterization and usefulness. The Holocene  12, 223-230..

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.

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 07:13:58 local time, Edinburgh, Scotland, UK.