| The neogene period FJ Hilgen, LJ Lourens, JA Van Dam, AG Beu, AF Boyes, RA Cooper, ... The geologic time scale 2, 923-978, 2012 | 830 | 2012 |
| The cambrian period SC Peng, LE Babcock, P Ahlberg Geologic time scale 2020, 565-629, 2020 | 585 | 2020 |
| Stratigraphic framework and time slices BD Webby, RA Cooper, SM Bergström, F Paris The great Ordovician biodiversification event, 41-47, 2004 | 474 | 2004 |
| The ordovician period RA Cooper, PM Sadler, O Hammer, FM Gradstein The geologic time scale, 489-523, 2012 | 373 | 2012 |
| Reconnaissance sandstone geochemistry, provenance, and tectonic setting of the lower Paleozoic terranes of the West Coast and Nelson, New Zealand BP Roser, RA Cooper, S Nathan, AJ Tulloch New Zealand Journal of Geology and Geophysics 39 (1), 1-16, 1996 | 372 | 1996 |
| The silurian period MJ Melchin, PM Sadler, BD Cramer Geologic time scale 2020, 695-732, 2020 | 326 | 2020 |
| The New Zealand biota: historical background and new research RA Cooper, PR Millener Trends in Ecology & Evolution 8 (12), 429-433, 1993 | 292 | 1993 |
| Global stratotype section and point for base of the Ordovician System RA Cooper, GS Nowlan, SH Williams Episodes Journal of International Geoscience 24 (1), 19-28, 2001 | 274 | 2001 |
| The New Zealand geological timescale FP Agterberg Institute of Geological & Nuclear Sciences Limited 22, 1-284, 2004 | 234 | 2004 |
| The Oligocene bottleneck and New Zealand biota: genetic record of a past environmental crisis A Cooper, RA Cooper Proceedings of the Royal Society of London. Series B: Biological Sciences …, 1995 | 227 | 1995 |
| The Ordovician graptolite sequence of Australasia AHM VandenBerg, RA Cooper Alcheringa 16 (1), 33-85, 1992 | 208 | 1992 |
| Geology of the Nelson Area: Image Data Institute of Geological & Nuclear Sciences Limited, MS Rattenbury, ... Institute of Geological and Nuclear Sciences, 1998 | 203* | 1998 |
| Estimating the rock volume bias in paleobiodiversity studies JS Crampton, AG Beu, RA Cooper, CM Jones, B Marshall, PA Maxwell Science 301 (5631), 358-360, 2003 | 201 | 2003 |
| The Ordovician graptolites of Spitsbergen RA Cooper, F RA | 193 | 1982 |
| early Paleozoic terranes of New Zealand RA Cooper Journal of the Royal Society of New Zealand 19 (1), 73-112, 1989 | 186 | 1989 |
| Rise and fall of species occupancy in Cenozoic fossil mollusks M Foote, JS Crampton, AG Beu, BA Marshall, RA Cooper, PA Maxwell, ... Science 318 (5853), 1131-1134, 2007 | 178 | 2007 |
| Early Palaeozoic terranes in New Zealand and their relationship to the Lachlan Fold Belt RA Cooper, AJ Tulloch Tectonophysics 214 (1-4), 129-144, 1992 | 176 | 1992 |
| High-resolution, early Paleozoic (Ordovician-Silurian) time scales PM Sadler, RA Cooper, M Melchin Geological Society of America Bulletin 121 (5-6), 887-906, 2009 | 170 | 2009 |
| Latitudinal and depth zonation of early Ordovician graptolites RA Cooper, RA Fortey, K Lindholm Lethaia 24 (2), 199-218, 1991 | 154 | 1991 |
| A phylogenetic classification of the graptoloids RA FORTEY, RA Cooper Palaeontology 29 (4), 631-654, 1986 | 140 | 1986 |
