| Calcareous oozes are common in the low and mid-latitudes while in other places, particularly the high latitudes, radiolarian oozes tend to dominate. |
| This contradiction cannot be resolved at present due to a lack of Cambrian radiolarian studies, which are needed to provide chronostratigraphic corroboration. |
| We unite here all these skeletonless radiolarian colonies into one single genus Collozoum, constituted in my Monograph. |
| Subsequently the massive sulfide deposit and surrounding metalliferous sediment apron were covered by oceanic radiolarian chert sediments. |
| This indicates that there existed a short period of radiolarian development before the great extinction at the Permian-Triassic transition. |
| A larger number of new forms has been found in the radiolarian ooze collected by the Challenger, and others fossil in Barbados. |
