Jökull


Jökull - 01.12.1987, Page 57

Jökull - 01.12.1987, Page 57
such a feature) is a feasible origin for the features of this area. This evidence in association with that of rock glacier activity illustrates that these features may provide an important component in the interpretation of the glacial landforms and deposits of this, now marginally glaciated, region. ACKNO WLEDGEMENTS The field work in 1985 was carried out by the Joint Vniversity Expedition to Northern Iceland — David Martin, Angela Gent, Tracy Brennard and Janette Lee. The Expedition was assisted ftnancially by The Royal Society and The Gino Watkins Memorial Fund, Scott Polar. Elizabeth Martin gratefully acknowledges the support of a D.E.N.I. research studentship. The Icelandic Research Council kindly allowed us permission to work in Skjóldalur. Mr Hallsson and his family at Yzta-Gerði showed us inuch hospitality dttring a cold, wet summer. We also acknowledge Devizes School for their foresighted work in surveying Nautadalur rock glacier, and Tony Escritt for his assistance in providing aerial photogra- phy of the area. Dr David Thomas provided construc- tive comments on the drafts of this paper. REFERENCES Brown, W.H. 1925: A probable fossil glacier. Journal of Geology 33: 464—466. Capps, S.R. 1910: Rock glaciers in Alaska. Journal of Geology 18: 359-375. Corte, A.E. 1976: Rock glaciers. Bieuletyn Peryglac- jalny 26: 175-205. Cross, W., and E. Howe. 1905: Geography and general geology of the quadrangle.ln: U.S. Geologi- cal Survey Atlas of the United States, Silverton Folio, Colorado 120: 1—25. Einarsson, T. 1968: Jardfrædi. Saga bergs og lands. Mál og menning. Reykjavik. 335pp. Escritt, T. 1976. North Iceland Glacier Inventory — 1975 Field Season. Jökull 26: 59—60. Eyles, N. 1978: Rock glaciers in Esjutjöll Nunatak Area, South-East Iceland. Jökull 28: 53—60. Johnson, P.G. 1983: Rock glaciers. A case for a change in nomenclature. Geografiska Annaler 65A: 27-34. Martin, H.E., and W.B. Whalley, in press: Rock gla- ciers: a review and discussion. Part 1: Rock glacier morphology: classification and distribution. Prog- ress in Physical Geography. McCall, J.G. 1960: The flow characteristics of a cirque glacier and their effect on glacial structure and cirque formation. In: W.V. Lewis (Ed.). Nor- wegian Cirque Glaciers. R.G.S. Research Series 4. 104pp. Outcalt, S.I., and J.B. Benedict. 1965: Photo-inter- pretation of two types of rock glacier in the Colo- rado Front Range, U.S.A. Journal of Glaciology 5: 849-856. Sigbjarnarson, G. 1983: The quaternary alpine glaci- ation and marine erosion in Iceland. Jökull 33: 87-97. Wahrhaftig, C„ and A. Cox., 1959: Rock glaciers in the Alaska Range. Bulletin of the Geological Society of America 70: 383—436. Washbttrn, A.L. 1979: Geocryology: a survey of peri- glacial processes and environments. (2nd edition) Arnold, London. 406pp. Whalley, W.B. 1974: Rock glaciers and their forma- tion as part of a glacier debris-transport system. Geographical Paper 24. University of Reading. 59pp. Ágrip GRJÓTJÖKULL (ÞELAURÐ) í NAUTADAL Á TRÖLLASKAGA Lýst er grjótjökli í Nautadal á Tröllaskaga, sem tal- inn er myndaður við það að jökulís hafi grafist undir urð. 55
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