Jökull


Jökull - 01.12.1982, Page 13

Jökull - 01.12.1982, Page 13
In spite of such negative conclusions about the possibility of determining where nunataks existed, n must, however, be considered rather probable that high peaks close to the shelf slope - and there are several areas with such a topography — might have remained ahxjve the surface of the ice sheet. Climadc conditions there must have been very harsh, however, making thechances ofsurvival ofa dora and fauna rather slim. f inally a few words about the fundamental quest- ton of the timeof the maximum ofthe iast inland ice sheet over Iceland. The rather well preserved glaci- al features and the rapid land upheaval suggest a late VVeichselian glaciation; Norddahl (1981, p. 476) refers to the earlier assumption that the maximum extent occurred 18,000 BP. His own investigations m Fnjóskadalur, however, may open the possibility ofgreaterages, at least for northem Iceland. REFERENCES van Bemmelen, R.IV. and M.G. Rutten, 1955: Table- mountains of northern Iceland. E.J. Brill, Leiden, 217 pp. Einarsson, E.H. 1970: Um hugsanleg íslaus svaedi í Mýrdal. Náttúrufraedingurinn 39: 251-257. Einarsson, Th. 1967: Zu der Ausdehnung der weichs- elzeitlichen Vereisung Nordislands. Sonderver- öff. Geol. Inst. Univ. Köln 13. 167-173. — 1968: Jardfraedi. Saga bergs og lands. Mál og menning, Reykjavík, 335 pp. Hoþþe, G. 1968: Grímsey and the maximum extent of the last glaciation of Iceland. Geograftska Annaler50A: 16-24. — 1971: Nordvasteuropas inlandsisar under den sista istiden - nágra glimtar frán ett forsknings- program. Svensk Naturvetenskap 1971: 31—4G. Kjartansson, G. 1955: Fródlegar jökulrákir. Náttúru- fraedingurinn 25: 154—171. — 1962: Jökulminjar á hálsum milli Berufjardar og Hamarsfjardar. Náttúrufraedingurinn 32:83-92. Lindroth, C. 1931: Die Insektenfauna Islands und ihre Probleme. Zool. Bidragfr. Uppsala 13: 105- 589. — 1963: The problem of late connections in the north Atlantic area. In: Löve, A. and D. Löve, (eds): North Atlantic biota and their history: 73-85. Löve, Á. and D. Löve, (eds.), 1963: North Atlantic biota and their history. Pergamon Press, 430 pp. Museum oj Natural History: Geological map of Ice- land. Sheets 1 (1969), 2 (1968), 3 (1960; 1980), 6 (1962), 7 (1977). Norddahl, H. 1981: A prediction ofminimumage for the VVeichselian maximum glaciation in North Iceland. Boreas 10: 471-476. Olajsdóttir, Th. 1974: Um botnlögun landgrunnsins í og undan Breidafirdi. Unpublished B.S. dissert- ation, Univ. Iceland, 21 pp. Thorarinsson, S. 1937: The main geological and topo- graphical features oflceland. Geografiska Ann- aler 19: 161-175. Thoroddsen, Th. 1906: Island. Gmndriss der Geo- graphie und Geologie. Petermanns Mitt., Er- gánzungsh. 152 und 153. 358 pp. Manuscriþt accepted 15 May 1982 ÁGRIP STÆRÐ JÖKULSKJALDAR Á ÍSLANDI Á SÍÐASTA JÖKULSKEIÐI Gunnar Hoþþe, Stokkhólmsháskóla Jökulmenjar á ystu annesjum og eyjum sýna að öll strandlengja íslands hefur verið hulin jökli. Víða sjást merki þess að jökullinn hefur verið svo þykkur að hann hefur skriðið út á landgrunnið og sums staðar þakið þar stór svæði. Þó verður að telja líklegt að háir tindar og hryggir hafi skagað upp úr ísbreiðunni, einkum þar sem landgrunns- ræman er mjó. Hinar vel varðveittu jökulmenjar og hið hraða landris bendir til þess að jökulskjöld- urinn hafi verið stærstur seint á síðastajökulskeiði. JÖKULL 32. ÁR 11
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