tephra SiO2 TiO2 Al2O3 FeO MnO MgO CaO Na2O K2O total Ref Glen Garry Tephra 74.27 0.52 12.67 3.71 0.11 0.41 2.35 3.28 1.97 99.23 853 Glen Garry Tephra 72.44 0.57 12.64 3.94 0.09 0.42 2.53 3.64 2.13 98.40 853 Glen Garry Tephra 72.27 0.63 12.71 4.52 0.10 0.67 2.75 3.65 2.02 99.34 853 Glen Garry Tephra 71.76 0.73 13.12 4.28 0.09 0.60 2.74 3.43 2.03 98.79 853 Glen Garry Tephra 71.76 0.62 13.37 4.10 0.07 0.49 2.54 3.44 2.20 98.59 853 Glen Garry Tephra 71.44 0.96 12.91 4.88 0.15 0.82 3.18 3.58 1.94 99.88 853 Glen Garry Tephra 71.33 0.59 12.81 4.49 0.07 0.51 3.00 3.49 1.89 98.16 853 Glen Garry Tephra 71.31 0.71 13.06 4.71 0.10 0.65 2.96 3.86 1.94 99.31 853 Glen Garry Tephra 71.28 0.65 12.85 4.37 0.12 0.59 2.86 3.50 1.97 98.19 853 Glen Garry Tephra 71.20 0.64 13.07 4.46 0.11 0.63 2.92 3.39 2.10 98.52 853 Glen Garry Tephra 70.95 0.85 13.23 4.93 0.12 0.73 3.17 3.23 1.91 99.10 853 Glen Garry Tephra 70.46 0.81 13.48 5.03 0.08 0.68 3.13 3.65 1.85 99.17 853 Glen Garry Tephra 68.41 1.03 13.36 5.86 0.14 1.03 3.85 3.57 1.62 98.88 853 Glen Garry Tephra 67.29 1.00 13.32 5.96 0.17 1.06 3.71 3.56 1.89 97.98 853 Glen Garry Tephra 63.09 1.49 13.14 7.65 0.17 1.97 5.49 3.51 1.34 97.86 853 Glen Garry Tephra 62.09 1.37 13.33 7.77 0.15 1.83 5.10 3.55 1.40 96.60 853 ------------------------------------------------------------------------ 853: Dugmore, A.J., Larsen, G, and Newton, A.J. (1995) Seven tephra isochrones in Scotland. The Holocene 5/3, 257-266.