40 Ar/ 39 Ar Age of Cretaceous-Tertiary Boundary Tektites from Haiti

Autor:	G. B. Dalrymple, G.A. Izett, L. W. Snee
Rok vydání:	1991
Předmět:	Paleontology Multidisciplinary Geochronology Boundary (topology) Sedimentary rock Sanidine Geology Cretaceous
Zdroj:	Science. 252:1539-1542
ISSN:	1095-9203 0036-8075
DOI:	10.1126/science.252.5012.1539
Popis:	(40)Ar/(39)Ar 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 (40)Ar/(39)Ar age of 64.6 +/- 0.2 million years ago, which is indistinguishable statistically from the age of the tektites.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9b33083b62a329db770a329da8c2f2a https://doi.org/10.1126/science.252.5012.1539 Zobrazit plný text záznamu Plný text ve formátu PDF