Jökull - 01.12.1983, Side 58

of a regular chlorite smectite (corrensite) from a
hydrocarbon reservoir sandstone. Clays Clay
Min. 29: 233-235.
Torrent, G., J. Dejou, M. Manier, P. Larroqué., J.P.
Gibert. 1982: Presence d’imogolite dans la com-
position mineralogique des fractions fines ex-
traites des croutes d’alteration observées sur le
basalt de Roudadou, Prés D’Aurillac, Cantal.
Clay Min. 17: 185-194.
Tryggvason, T. 1940: Uber ein Tongestein aus Is-
land, Bull. geol. inst. Uppsala 28: 123-132.
Tryggvason. T. 1960: Rannsóknir á vestfirzkum leir.
Atvinnudeild Háskólans, Skýrsla Iðnaðardeild-
ar árin 1947-1956, (Report University Research
Institute, Reykjavík), 146-159. (in Icelandic).
Wada, K. 1977: Allophane and imogolite, In J.B.
Dixon and S. D. Weed, eds: Minerals in the Soil
Environments, Soil Sci. Soc. Am., Madison,
Wisc.: 603-638.
Wada, K., T. Henmi, N. Yoshinaga, and S.H. Patterson
1972: Imogolite and allophane formed in sapro-
lite of basalt on Maui, Hawaii. Clays Clay Min.
20: 375-380.
Walker, G.P.L. 1960: Zeolite zones and dike distri-
bution in relation to the structure of the basalts
ofeastern Iceland. J. Geol. 68: 515-528.
Weaver, C.E. 1976: The nature of TiOa in kaolinite.
Clays Clay Min. 24: 215-218.
Weaver, G.E., and L.D. Pollard 1973: The Chemistry
of Clay Minerals. Developments in sedimento-
logy 15, Elsevier Scientific Publ. Comp. 213 pp.
Wilson, M.J. and J.M. Tait, 1977: Halloysite in some
soils from North East Scotland. Clay Min. 12:
59-66.
Windisch, P. 1886: Beitragezur Kenntnis derTertiar-
flora von Island. Zeitschr. Naturwiss. 59: 215-
262.
Winkler, G.G. 1863: Island, der Bau seiner Gebirge
und dessen geologische Bedeutung. Miinchen.
Yariv, S., E. Mendelovici, R. Villalba and M. Cohen,
1979: Transformation ofgoethite to maghaemite
in Csl disk. Nature 279: 519-520.
ÁGRIP
SETLÖG MILLI HRAUNLAGA
Á VESTFJÖRÐUM OG VESTURLANDI
Elen Roaldset, Oslóarháskóla
Setlög milli hraunlaga á Vestfjörðum og Vestur-
landi eru úr lateriti, surtarbrandi, leir og ösku-
kenndu efni. Við athugun á gerð þeirra, steindum
og efnasamsetningu kom í ljós, að samsetningu
þeirra má rekja til palagonitiseringar, veðrunar og
ummyndunar vegna hita og fargs.
56 JÖKULL 33. ÁR