USGS Publishes Updated Geological Divisions
posted by Will Baird at 8:31 AM
Tuesday, July 27, 2010
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3 Comments:
If they're going to all that trouble, I wish they'd redefine the Phanerozoic to include the Ediacaran. It's a glaring anomaly otherwise.
The problem is that this USGS timescale is actually more out-of-date than the one released by GSA last year:
Walker, J. D., and J. W. Geissman. 2009. GSA geologic time scale. GSA Today 19:60-61.
As Chris notes, the new USGS timescale omits the Ediacaran and fails to revise the ages for the Late Triassic stages.
Its all too bad, because I've seen a variety of blogs talking about this being the 'newest' timescale.
My bad - I see the Ediacaran is actually there. Chris - it is in the Proterozoic, where it should be.
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