Náttúrufræðingurinn - 1984, Síða 23

ancii jarðmyndunum frá plíó-pleistosen hefur líklega einungis myndast alkalíólivínbasalt og
millibasalt. 1 öðrum jarðmyndunum frá plíó-plestosen, svo og tertíer, hefur aðeins
myndast basalt af ólivínþóleiít og þóleiít-gerð, að því er best er vitað. - Map of Iceland
showing the tholeiitic zones (dark shaded) cf. K. Sœmundsson (1980). In the alkalic
zones (light shaded) and adjacent Quaternary formations only alkalic basaltic rocks have
formed. In other (older) formations only tholeiític basalts have formed, as far as known.
Guðmundur Kjartansson. 1967. Rúmmál
hraundyngna. - Náttúrufræðingurinn
37: 125.
Jón Jónsson. 1978. Jarðfræðikort af
Reykjanesskaga. — Orkustofnun
OSJHD 7831: 303 bls. og 21 kortblað.
Kristján Sæmundsson. 1980. Outline of
the geology of Iceland. — Jökull 29: 7—
28.
Níels Óskarsson, Guðmundur E. Sigvalda-
son & Sigurður Steinþórsson. 1982. A
dynamic model of rift zone petrogenes-
is and the regional petrology of Ice-
land. — J. Petrol. 23: 28—74.
O’Nions, R. K. & Karl Grönvold. 1973.
Petrogenetic relationship of acid and
basic rocks in Iceland. Sr-isotopes and
rare-earth elements in late and post-
glacial volcanics. - Earth Planet. Sci.
Letters 19: 397—409.
Sveinn P. Jakobsson. 1972. Chemistry and
distribution pattern df Recent basaltic
rocks in Iceland. — Lithos 5: 365—386.
Sveinn P. Jakobsson, Jón Jónsson & Shi-
do, F. 1978. Petrology of the western
Reykjanes Penisula, Iceland,— J. Petr-
ol. 19: 669-705.
Sveinn P. Jakobsson. 1979. Petrology of
Recent basalts of the Eastern Volcanic
Zone, Iceland. — Acta Naturalia Is-
landica 26: 103 bls.
Sveinn P. Jakobsson. 1983. íslenskar berg-
tegundir I. Pikrít (óseanít). — Náttúru-
fræðingurinn 52: 80-85.
17
2