Comment and reply on âSubdivision of Ordovician and Silurian time scale using accumulation rates of graptolitic shaleâ
Churkin, Michael, Carter, Claire, Johnson, Bruce R.Volume:
7
Year:
1979
Journal:
Geology
DOI:
10.1130/0091-7613(1979)72.0.CO;2
File:
PDF, 350 KB
1979