North Atlantic total radiolarian flux lower in late Pleistocene than Holocene
North Atlantic shallow-living species' flux lower in late Pleistocene than Holocene
Late Pleistocene low shallow-living species' flux reflects cold ocean stratification.
Holocene increase in Shallow Assemblage flux major cause of lower % C. davisiana
Shallow Assemblage and C. davisiana flux changes similar to those from North Pacific