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The Pamphlet Collection of Sir Robert Stout: Volume 67

Analyses of Typical Volcanic Rocks, from Clarence King's "Geology of the Fortieth Parallel."

Name. Locality. Silica. Alumina. Iron Oxides Manganese. Lime. Magnesia. Soda. Potassium. Potash. Chlorine. Phosphoric Acid. Sulphurous Acid. Organic Matter. Water. Specific Gravity. Propvlite .. .. .. 60.90 16.90 5.50 Tr. 5.30 2.30 3.30 2.80 .. .. .. .. .. .. 98.10 2.4 Quartz propylitc .. .. 66.20 12.30 13.20 " 2.00 0.80 3.30 4.45 .. .. .. .. .. .. 101.70 2.4 Andesite .. .. .. 62.40 16.10 12.40 " 5.10 1.90 2.80 2.70 .. .. .. .. .. .. 103.5 2.6 Andesite, dacite .. .. 69.90 14.30 5.00 " 2.10 1.00 2.80 3.30 .. .. .. .. .. .. 98.4 .. Trachyte .. .. .. 60.00 16.10 7.00 0.10 5.60 3.10 3.40 3.40 .. .. .. .. .. .. 101.1 2.4 Rhyolite .. .. .. 73.60 12.90 1.90 0.10 1.20 0.50 3.00 5.60 .. .. .. .. .. .. 98.7 2.3 Basalt .. .. .. 53.90 17.30 9.90 Tr. 7.50 5.70 3.40 1.60 .. .. .. .. .. .. 99.5 2.7 From J. Bete Juke's "Manual of Geology." Basalt .. .. .. 48.00 13.80 13.80 .. 10.20 6.50 3.00 1.50 .. .. .. .. .. .. 100.0 2.96 J. A. Pond'S Analyses Of Rocks, &c., from Tarawera. Ash* .. .. Southern craters 66.85 17.95 6.05 .. 3.85 0.20 0.33 .. 0.16 0.05 0.09 0.39 1.30 0.85 97.07 .. Mud .. .. Wairoa 70.10 15.95 5.15 .. 2.60 0.30 0.37 .. 0.19 0.07 0.09 0.32 1.30 0.90 97.34 .. Dust .. .. Tauranga 64.00 18.16 7.20 .. 5.42 1.90 0.58 .. 0.18 0.03 0.14 0.48 0.90 0.75 99.74 .. Ash† .. .. Whakatane 57.15 18.35 11.55 .. 8.36 1.37 0.64 .. 0.17 0.04 0.095 0.35 0.20 0.30 98.57 .. Ash .. .. Opitiki 56.30 17.70 11.50 .. 8.45 2.20 0.59 .. 0.17 0.06 0.125 0.30 0.25 0.15 97.79 .. Lapilli‡ .. .. Wairoa 50.90 20.00 14.10 .. 10.38 2.77 0.70 .. 0.14 0.04 0.16 0.22 .. .. 99.41 .. Lapilli .. .. Pareheru 51.35 18.20 14.50 .. 10.26 3.10 0.84 .. 0.16 0.05 0.125 0.41 .. 0.25 99.25 .. Lapilli .. .. Rotoehu 52.60 18.30 12.70 .. 11.05 4.65 0.67 .. 0.09 .. 0.06 .. .. .. 100.12 .. Dr. Hector's Analyses of Dust From Tarawera Eruption. (See Appendix, Journal House of Representatives, 1886, H.-25.) Dust .. .. Tauranga 60.74 16.09 11.58 Tr. 5.69 0.96 Alkalies, 2.68 .. Tr. .. Tr. 2.26 100.0 .. Dust .. .. East Cape 59.37 17.96 10.18 " 5.98 1.19 " 2.12 .. " .. 0.99 2.21 100.0 .. * The white impalpable powder. † Mixed with fine lapilli. ‡ Lapilli from Tarawera Mountain.

Analyses of Typical Volcanic Rocks, from Clarence King's "Geology of the Fortieth Parallel."