Morphology and magnetic anomalies north of Iceland.

P. R. Vogt, G. L. Johnson, Leó Kristjánsson

Research output: Contribution to journalArticlepeer-review

83 Citations (Scopus)


Detailed low-level aeromagnetic data between Iceland and 70oN are combined with published bathymetric, seismic reflection, and other data to yield a new tectonic synthesis of this region of anomalously shallow sea floor. On Kolbeinsey Ridge short transform faults have repeatedly formed and disappeared over the last 7-8 Ma. Spreading from Kolbeinsey Ridge began about anomaly 6C time (24 Ma) ; total opening rates increased from 1.5 cm/a to 2 cm/a about 12-13 Ma ago. The Intermediate-Iceland-Plateau extinct axis thus does not exist, and oceanic crust must underlie much of the Greenland margin, perhaps up to the coast itself. This in turn implies locally over 100 km prograding, much of which probably occurred during Plio-Pleistocene glacial periods. The Iceland shelf has been prograded locally 25 km or more. -Authors

Original languageEnglish
Pages (from-to)67-80
Number of pages14
JournalJournal of Geophysics - Zeitschrift fur Geophysik
Issue number1-3
Publication statusPublished - 1980


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