Flood basalt volcanism during the past 250 million years

Details Flood basalt volcanism during the past 250 million years Flood basalt volcanism during the past 250 million years

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988sci...241..663r&link_type=abstract

Science (ISSN 0036-8075), vol. 241, Aug. 5, 1988, p. 663-668. Research supported by Columbia University.

Physics

80

Basalt, Geochronology, Lava, Volcanology, Argon Isotopes, Extinction, Potassium 40, Radioactive Age Determination

Scientific paper

A chronology of the initiation dates of major continental flood basalt volcanism is established from published potassium-argon (K-Ar) and argon-argon (Ar-Ar) ages of basaltic rocks and related basic intrusions. The dating is therefore independent of the biostratigraphic and paleomagnetic time scales. Estimated errors of the initiation dates of the volcanic episodes determined from the distributions of the radiometric ages are, approximately, + or - 4 percent. There were 11 distinct episodes during the past 250 million years. Sometimes appearing in pairs, the episodes have occurred quasi-periodically with a mean cycle time of 32 + or - 1 (estimated error of the mean) million years. The initiation dates of the episodes are close to the estimated dates of mass extinctions of marine organisms. Showers of impacting comets may be the cause.

Affiliated with

Also associated with

No associations

Rating

Flood basalt volcanism during the past 250 million years does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Flood basalt volcanism during the past 250 million years, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flood basalt volcanism during the past 250 million years will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1696464