Jökull - 01.12.1980, Page 21

Mollusken genera (Neptunea, Panomya, Cyr-
todaria und Mya). Abh. Senckenb. Natur-
forsch. Ges. 531: 211 pp. (In German).
Sæmundsson, K. 1974: Evolution of the axial
rifting zone in Northern Iceland and the
Tjörnes Fracture Zone. Bull. Geol. Soc.
Am. 85: 495-504.
— 1977: Geological map of Iceland. Sheet 7.
North East Iceland. Museum of Natural
History and Iceland Geodetic Survey,
Reykjavík.
— 1978: Fissure swarms and central volcanoes
of the neovolcanic zones of Iceland. In: D.
R. Bowes and B. E. Leake (eds.), Crustal
evolution in northwestern Britain and ad-
jacent regions. Seel House Press, London.
Geol. J. Spec. Issue 10: 415 — 432.
Thorarinsson, S. 1965: Neðansjávargos við Is-
land. Náttúrufræðingurinn 35: 49—74. (In
Icelandic).
Thorarinsson, S., T. Einarsson and G. Kjartansson
1959: On the geology and geomorphology
of Iceland. Geogr. Ann. 41: 135— 169.
Thoroddsen, Th. 1902: Islandske Fjorde og
Bugter. Geogr. Tidsskr. 16: 58 — 82. (In
Danish).
— 1906: Island. Grundriss der Geographie
und Geologie. Petermanns Mitt., Ergán-
zungsh. 152 und 153: 358 pp. Justus
Perthes, Gotha. (In German).
— 1925: Die Geschichte der islándischen Vul-
kane. K. Dan. Vidensk. Selsk., Naturh.
Math. Afd. 8, Række 9,.458 pp. (In Ger-
man).
Tómasson, J. 1969: Jarðlagasnið. Viðbætir við
skýrsluna Jarðhiti við Húsavík. Natl. En-
erg. Auth. Dep. Nat. Heat (March).
Reykjavík, 43 pp. (In Icelandic).
Tómasson, J., G. Pálmason, J. Jónsson and S.
Björnsson 1969: Jarðhiti við Húsavík. Natl.
Energ. Auth. Dep. Nat. Heat (March),
Reykjavík, 50 pp. (In Icelandic).
Tryggvason, T., N. Nielsen and S. Thorarinsson
1956: I b — Islande. In: Comm. Stratigr.
20. Congr. Géol. Int. (Mexico), Lexique
Stratigraphique International 1: Europe
(Fasc. 1 Arctique, 101 pp.), 1 — 12. (In
German).
IValker, G. P. L. 1975: Excess spreading axes
and spreading rate in Iceland. Nature 255:
468-470.
Ward, P. L. 1970: A new interpretation of the
geology of Iceland. — A detailed study of a
boundary between lithospheric plates. Ph.
D. thesis (part I), Columbia University, 72
pp.
— 1971: New interpretation of the geology of
Iceland. Bull. Geol. Soc. Am. 82: 2992—
3012.
Watkins, N. D., L. Knstjánsson and I. McDougal!
1975: A detailed paleomagnetic survey of
the type location for the Gilsa geomagnetic
polarity event. Earth Planet. Sci. Lett. 27:
436-444.
Watkins, N. D. and G. P. L. Walker 1977:
Magnetostratigraphy of Eastern Iceland.
Am. J. Sci. 277: 513-584.
Wensink, PI. 1964: Palaeomagnetic strati-
graphy of younger basalts and intercalated
Plio-Pleistocene tillites in Iceland. Geol.
Rundsch. 54: 364—384.
Windisch, P. 1886: Beitráge zur Kenntniss der
Tertiárflora von Island. Z. Naturwiss. 59:
215—262. (In German).
Winkler, I. G. G. 1863: Island. Der Bau seiner
Gebirge und dessen geologische Be-
deutung. Gummi, Múnchen, 280 pp. (In
German).
Woldstedt, P. 1965: Das Eiszeitalter. Grund-
linien einer Geologie des Quartars III.
Ferdinand Enke Verl., Stuttgart, 327 pp.
(In German).
Wolff F. von 1931: Der Atlantische Ozean. In:
F. von Wolff (ed.), Der Vulkanismus II.
Ferdinand Enke Verl., Stuttgart, 829—
1111.
Zagwijn, W. //. 1974: The Pliocene-Pleistocene
boundary in western and southern Europe.
Boreas 3: 75—97.
Zullo, V. A. 1968: Balanus hopkinsi, New
Species, and B. balanus (Linnaeus, 1758)
Cirripeda, Thoracia) from Plio-Pleistocene
sediments on Tjörnes, Northern Iceland.
Occas. Pap. Calif. Acad. Sci. 69: 11 pp.
Manuscript accepted 24th September 1980.
JÖKULL 30. ÁR 19