40Ar/39Ar age of Cretaceous-Tertiary boundary tektites from Haiti
Science
By: G. A. Izett, G. B. Dalrymple, and L.W. Snee
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Abstract
40Ar/39Ar dating of tektites discovered recently in Cretaceous-Tertiary (K-T) boundary marine sedimentary rocks on Haiti indicates that the K-T boundary and impact event are coeval at 64.5 ± 0.1 million years ago. Sanidine from a bentonite that lies directly above the K-T boundary in continental, coal-bearing, sedimentary rocks of Montana was also dated and has a 40Ar/39Ar age of 64.6 ± 0.2 million years ago, which is indistinguishable statistically from the age of the tektites.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | 40Ar/39Ar age of Cretaceous-Tertiary boundary tektites from Haiti |
| Series title | Science |
| DOI | 10.1126/science.252.5012.1539 |
| Volume | 252 |
| Issue | 5012 |
| Year Published | 1991 |
| Language | English |
| Publisher | American Association for the Advancement of Science |
| Description | 4 p. |
| First page | 1539 |
| Last page | 1542 |
| Country | Haiti |