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Heliolithaceae Hay & Mohler, 1967

Edited by Lyndsey on Fri, 11/03/2011 - 11:11

Heliolithaceae Hay & Mohler, 1967

Description: Discoidal discoasteralids with several distinct cycles including at least one that is birefringent cycle.

Remarks: Group of nannoliths closely allied to the discoasters, and probably transitional between typically VR heterococcolith morphology and the more derived, single crystal-unit form of Discoaster.

Geological Time Data
Geological Time Periods: 
NP10
NP5
Biblio Reference: 
Varol, O.  1998.  Palaeogene. Calcareous nannofossil biostratigraphy. :200-224.
Notes on occurrence information: 

Predominantly upper Paleocene group

Scratchpads developed and conceived by: Vince Smith, Simon Rycroft, Dave Roberts, Ben Scott...