A revised geological time-scale

Volume: 17, Issue: 3, Pages: 183 - 216
Published: Jan 1, 1959
Abstract
The time-scale constructed in 1947 was based on certain assumptions that have recently been shown to be wrong. Appalachian pegmatites dated at 350 million years (m.y.) and thought to be null Taconic null (Ordovician) are now found to be null Acadian null (late Devonian), while others, dated at 255 m.y. and thought to be null Acadian null can now be referred to the Permian. Other recent evidence consistently leads to an extension of the 1947...
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Paper Details
Title
A revised geological time-scale
Published Date
Jan 1, 1959
Volume
17
Issue
3
Pages
183 - 216
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