Náttúrufræðingurinn - 1952, Blaðsíða 29

HVERFJALL
171
The so-called palagonite formation is so complex that one should avoid generali-
zations based on limited observations. Detailed and thorough studies of many separate
mountains and restricted areas are needed before tve can regard the problem of the
palagonite formation satisfactorily settled.
HEIMILDARRIT
Baring-Gould, S.: Iceland. Its Scenes and Sagas. London 1863.
Barth, T. F. W.: Craters and Fissure Eruptions at Mývatn in Iceland. Norsk Geogra-
fisk Tidsskrift, Bd. IX, Nr. 2. Oslo 1942.
— Island. Oslo 1941.
— Volcanic Geology, Hot Springs and Geysers of Iceland. Publ. 587. Carnegie Inst. of
Washington. Washington 1950.
Burton, R. F.: Ultima Thule. London 1875.
Cotton, C. A.: Volcanoes as Landscape Forms. Wellington. London 1944.
Dauberry, Ch.: A Description of Active and Extinct Volcanos. London 1848.
Dufrénoy, M.: Mémoire sur les terrains volcaniques des environs de Naples. Annales
des Mines. Tome XI. Paris 1837.
Einarsson, T.: Origin of the Basic Tuffs of Iceland. Acta Naturalia Islandica. Vol. I, 1.
Reykjavík 1945.
— Hverfjall og Hrossaborg. Náttúrufræðingurinn. 18. árg., 3. hefti. Reykjavík 1948.
Firth, C. F.: The Geology of the North-west Portion of Manukau County, Auckland.
Trans. N. Z. Inst., Vol. 61. 1930.
Flores, T.: Investigaciones geologicas relativas al volcan Paricutin. Estudios vulcano-
logicos. E1 Paricutin. Imprenta Unversitaria. Mexico 1945.
Grossmann, K.: The Crater Hverfjall. The Glacialists Magazine. Vol. I. No. 4. London
1893.
Grumbkow, Ina v.: ísafold. Reisebilder aus Island. Berlin 1909.
Hclland, A.: Om Island I—V. Nyt Tidsskrift. ICristiania 1882.
— Studier over Islands Petrografi og Geologi. Archiv f. Mathematik og Naturviden-
skap. Kristiania 1884.
Hochstetter, F. v.: Geologie von Neu-Seeland. Novara Expedition. Geologischer Theil.
I. Band, 1. Abteilung. Wien 1864.
— & Petermann, A.: Geology of New Zealand. Auckland 1864.
---Geological and Topographical Atlas of New Zealand. Auckland 1864. Map III.
Jaggar, T. A.: Origin and Development of Craters. The Geol. Soc. of Am. Mem. 21.
Baltimore 1947.
Johnstrup, Fr.: Om de vulkanske Udbrud og Solfatarerne i den nordöstlige Del af Is-
Iand. Naturhist. Foren. Festskrift. Kjöbenhavn 1886.
Jónsson, Ó.: Ódáðahraun. Annað bindi. Akureyri 1945.
Judd, John W.: Volcanoes. London 1881.
Kjerulf, Th.: Islands Vulkanlinjer. Nyt Magazin for Naturvidenskaben XXI. 1876.
Knebel, W. v.: Studien in Island im Sommer 1905. Globus. Bd. LXXXVIII, Nr. 20, 22,
24. Braunschweig 1905.