Deep Sea Drilling: Age and Composition of an Atlantic Basaltic Intrusion

Science  26 Mar 1971:
Vol. 171, Issue 3977, pp. 1244-1245
DOI: 10.1126/science.171.3977.1244


The fission track age of a basalt recovered from beneath Campanian sediments on the lower western flank of the Mid-Atlantic Ridge is (15.9 ± 1.6) x 106 years. The major element composition of a glassy margin of the basalt is similar to that of oceanic tholeiites except for a markedly higher potassium concentration.