Affiliation:
1. Geological Survey of Canada, Department of Mines and Technical Surveys
Ottawa, Canada
Abstract
SummaryLittle information is available that can be used with confidence to construct a Triassic time-scale. The base of the system is variously dated in the range 220 to 238 m.y.; the age of the boundary with the Jurassic is also uncertain, but may be placed at about 190 to 200 m.y Apart from a Russian determination giving a minimum age of 200 m.y. for the Middle Triassic, the only radiometric data available are for the Upper Triassic.
Publisher
Geological Society of London
Subject
Geology,Ocean Engineering,Water Science and Technology
Reference12 articles.
1. The geochronological scale in absolute ages according to the data of the laboratories of the U.S.S.R. for 1960;Anon;Izv. Acad. Sci. U.S.S.R., Geol. Ser.,1960
2. Potassium‐argon ages in eastern Australia
3. GEOLOGIC TIME SCALE
4. Potassium–argon time scale;Folinsbee;Int. geol. Congr.,1960
5. A revised geological time-scale
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