planktonic geochronology The use of planktonic organisms, e.g. globigerinid foraminiferids or microscopic algae, to provide a relative dating of sediments deposited in marine waters. Radioactive-decay methods applied to planktonic organisms may also yield an absolute date or information on palaeoclimates.

planktonic geochronology The use of planktonic organisms (e.g. globigerinid foraminiferids or microscopic algae) to provide a relative dating of sediments deposited in marine waters. Radioactive-decay methods applied to planktonic organisms may also yield an absolute date or information on palaeoclimates.

planktonic geochronology The use of planktonic organisms (e.g. microscopic algae) to provide a relative dating of sediments deposited in marine waters. Radioactive-decay methods applied to planktonic organisms may also yield an absolute date or information on palaeoclimates.