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The Vulcano-Glacial Palagonite Formation of Iceland

  • Martin A. Peacock (a1)

Extract

The geological feature which strikes the traveller in Iceland perhaps most forcibly is the complete contrast afforded by the well-ordered, level, or gently dipping basalt sheets with almost negligible tuff intercalations which constitute the Pre-glacial Kainozoic Plateau and the Late-glacial and Recent volcanic formations, and the enormous, chaotic, rarely-bedded accumulations of the Palagonite Formation in which lava flows are subordinate in amount; and he is at once presented with the question: Why did igneous action which produced lava sheets in Pre-glacial times result in dominant tuffs and breccias in the period which followed, and then revert to the production of lavas in later times ? This question has not yet been fully answered.

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References

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1847. Bunsen, R., “Beitrag zur Kenntniss ties Isländischen Tuffgebirges”: Annul, d. Chem., lxi, pp. 265–79.
1895. Johnston-Lavis, H. J., “Notes on the Geography, Geology, Agriculture, and Economics of Iceland”: Scott. Geog. Mag., xi, pp. 441–60, with 11 illustrations.
1886. Keilhack, K., “Beiträge zur Geologie der Insel Island”: Z.d.g.G., xxxviii, pp. 376449, figs. 1–13, pls. viii–xi.
1925. Keilhack, K.Die geologischen Verhältnisse der Umgebung von Reykjavik und Hafnarfjördur in Südwest-Island”: Z.d.g.G., lxxvii, pp. 147–65, figs. 1–12, pls. i–vii, and map, 1: 50,000.
1926. Peacock, M. A., “The Geology of Videy, S.W. Iceland: a Record of Igneous Action in Glacial Times”: Trans. Roy. Soc. Edin., liv, pp. 441–65, figs. 1–11, pl. i.
1879. Penck, A., “Ueber Palagonit- und Basalttuffe”: Z.d.g.G., xxxi, pp. 504–77.
1900. Pjeturss, H., “The Glacial Palagonite-Formation of IcelandScott. Geog. Mag., xvi, pp. 265–93.
1903. Pjeturss, H.On a Shelly Boulder-Clay in the so-called ‘ Palagonite-Formation’ of Iceland”: Q.J.G.S., lxi, pp. 356–61, figs. 1–2.
1910. Pjeturss, H.Island”: Handb. Reg. Geol., iv (i), 22 pp.
1901. Thoroddsen, Th., “Geological Map of Iceland, surveyed in the years 1881–93, edited by the Carlsberg Fund (Copenhagen), 1: 600,000.”
1906. Thoroddsen, Th., “Island, Grundriss der Geographie und Geologie”: Peterm. Geol. Mitth., Ergänz., clii–cliii, 358 pp., 16 figs., 3 pls., 4 maps.
1917. Washington, H. S., “Chemical Analyses of Igneous Rocks”: U.S. Geol. Surv., Prof. Paper 99, 1201 pp.

The Vulcano-Glacial Palagonite Formation of Iceland

  • Martin A. Peacock (a1)

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