. The Quarterly journal of the Geological Society of London. rather than an igneous rock is abnormal among albite-diabases in containing muchprimary quartz, and perhaps micropegmatite; but no doubt can beentertained that it is intrusive, and closely connected in origin withthe pillow-lavas. A chert-like rock, associated with a green diabase north of 1 The Geology of Dartmoor Mem. Geol. Surv. 1912, p. 20. 2 Miss C. A. Raisin, Variolite of the Lleyn & Associated Volcanic Rocks *Q. J. G. S. vol. xlix (1893) p. 152. 3 E. Greenly, The Origin & Associations of the Jaspers of South-EasternA
. The Quarterly journal of the Geological Society of London. rather than an igneous rock is abnormal among albite-diabases in containing muchprimary quartz, and perhaps micropegmatite; but no doubt can beentertained that it is intrusive, and closely connected in origin withthe pillow-lavas. A chert-like rock, associated with a green diabase north of 1 The Geology of Dartmoor Mem. Geol. Surv. 1912, p. 20. 2 Miss C. A. Raisin, Variolite of the Lleyn & Associated Volcanic Rocks *Q. J. G. S. vol. xlix (1893) p. 152. 3 E. Greenly, The Origin & Associations of the Jaspers of South-EasternAnglesey Q. J. G. S. vol. lviii (1902) pp. 429-30. 4 The Geology of the Country around Mevagissey Mem. Geol. Surv. 1907 ^p. 54. 5 The Geology of the Lizard & Meneage Mem. Geol. Surv. 1912, p. 184. 6 H. Dewey & J. S. Flett, On some British Pillow-Lavas & the Rocks-Associated with them Geol. Mag. dec. 5, vol. viii (1911) p. 206. Quart Journ. Geol. Soc. Vol. LXIX, PI. XLIX. Fig. 1.—Interbedded bands 2^>cismig into1 -Tli rust Fig. 2. — Quartz-knob on the western slope of Mynydd Enlli.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectgeology, bookyear1845
