Published May 1980 | Version v1
Journal article Metadata-only

A Rb/Sr age for the Cretaceous-Tertiary boundary (Z coal), Hell Creek, Montana

Creators

  • 1. Alberta Univ., Edmonton (Canada). Dept. of Geology

Description

A Rb/Sr isochron age of 63.6 +- 0.4 Ma for bentonite biotite and sanidine at Hell Creek, Montana, dates a palynofloral change marking the Cretaceous-Tertiary boundary in west-central North America. Extensive Rb and Sr variations caused by alterations of the biotites does not seem to unduly affect the presumed crystallization age of the biotite. (auth)

Additional details

Publishing Information

Journal Title
Can. J. Earth Sci.
Journal Volume
17
Journal Issue
5
Series
Can. J. Earth Sci.
Journal Page Range
671-673
ISSN
0008-4077

INIS

Country of Publication
Canada
Country of Input or Organization
Canada
INIS RN
12575286
Subject category
S58: GEOSCIENCES;
Descriptors DEI
COAL; ISOTOPE DATING; ISOTOPE RATIO; RUBIDIUM 87; STRONTIUM 86; STRONTIUM 87
Descriptors DEC
AGE ESTIMATION; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; ENERGY SOURCES; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; FOSSIL FUELS; FUELS; HOURS LIVING RADIOISOTOPES; INTERMEDIATE MASS NUCLEI; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; RADIOISOTOPES; RUBIDIUM ISOTOPES; STABLE ISOTOPES; STRONTIUM ISOTOPES; YEARS LIVING RADIOISOTOPES