. Bulletin of the British Museum (Natural History), Mineralogy. Anso An 80 -1âIââ âI I p I 50" 55' o^'^TA 60" I â â » » â â 65" 70" 6^ 60 55" . I I I I 75" An 50 i-"" An 70 An 60 < An 80. Anso An70 ALBITE TWINS Aneo Anso 75" 60° iP^ ^'^TA 70° 80" Fig. 6. Relation between a'^ twin axis, ^S^ twin axis and composition for plagioclases from the Gower-Lidgbird lavas and from the dyke rocks. The solid lines are Slemmons' curves for high temperature plagioclases. The broken lines are Slemmons' curves for low temperature plagioclases. The dotted
. Bulletin of the British Museum (Natural History), Mineralogy. Anso An 80 -1âIââ âI I p I 50" 55' o^'^TA 60" I â â » » â â 65" 70" 6^ 60 55" . I I I I 75" An 50 i-"" An 70 An 60 < An 80. Anso An70 ALBITE TWINS Aneo Anso 75" 60° iP^ ^'^TA 70° 80" Fig. 6. Relation between a'^ twin axis, ^S^ twin axis and composition for plagioclases from the Gower-Lidgbird lavas and from the dyke rocks. The solid lines are Slemmons' curves for high temperature plagioclases. The broken lines are Slemmons' curves for low temperature plagioclases. The dotted line I-I is the " intermediary index of ordering " Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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