Selective calcareous nannoplankton survivorship at the Cretaceous-Tertiary boundary

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doi: 10.1130/G21566AR.1
Author(s): Bown, Paul R.
Author Affiliation(s): Primary:
University College London, Department of Earth Sciences, London, United Kingdom
Volume Title: Geology (Boulder)
Source: Geology (Boulder), 33(8), p.653-656. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613 CODEN: GLGYBA
Note: In English. 34 refs.; sects.
Summary: Calcareous nannoplankton underwent devastating diversity loss at the Cretaceous- Tertiary boundary (65.5 Ma), but recovered rapidly in the early Paleocene from a small number of survivor species. An understanding of this survivorship has been hampered by uncertainties introduced by reworking and mixing, but new high-resolution assemblage data from the northwest Pacific (Shatsky Rise, Ocean Drilling Program Site 1210) allow the unequivocal identification of 10 survivors. Evidence of shared adaptive strategies among these species provides the first indication that the extinctions were selective, with survival limited to a few neritic and/or opportunistic species, probably facilitated by hardiness and/or life-cycle escape strategies.
Year of Publication: 2005
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Adaptation; Algae; Assemblages; Cenozoic; Cores; Cretaceous; Extinction; K-T boundary; Leg 198; Lower Paleocene; Mesozoic; Microfossils; Nannofossils; Natural selection; North Pacific; Northwest Pacific; ODP Site 1210; Ocean Drilling Program; Pacific Ocean; Paleocene; Paleoecology; Paleogene; Plantae; Shatsky Rise; Stratigraphic boundary; Tertiary; Upper Cretaceous; West Pacific
Coordinates: N321300 N321300 E1581600 E1581600
Record ID: 2005048151
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States