[coccoliths] KN zonation

[Emma Sheldon]

I agree, like the nanno zonations of Jeremiah (2001) and Mortimer (87), designed for offshore and drilling, very useful
All the best,
Emma

Emma Sheldon,
Biostratigrapher / Senior Researcher,
Department of Geoenergy and Storage,
Geological Survey of Denmark and Greenland (GEUS),
Øster Voldgade 10,
DK 1350,
Copenhagen K,
Denmark.
Tel: 0045 9133 3712



Fra: Coccoliths <coccoliths-bounces at fcnym.unlp.edu.ar> På vegne af Bryan Ladner
Sendt: 28. marts 2025 13:40
Til: Mailing list for INA members and other scientists working with living or fossil nannoplankton <coccoliths at fcnym.unlp.edu.ar>
Emne: Re: [coccoliths] KN zonation

I think that Bergen and Sikora worked this zonation up primarily for use in oil exploration. Given that the biostrat is worked from the top down as the well is being drilled then I think that this is perfectly useful for the task it's intended for.

On Fri, Mar 28, 2025 at 3:53 AM Ines Galović <inesgalovic at gmail.com<mailto:inesgalovic at gmail.com>> wrote:
To all, I believe younger colleagues or maybe biologists, if you want your biostratigraphy to be useful, I suggest following some biostratigraphic basic rules such as  "Biostratigraphic units are distinct from other kinds of stratigraphic units in that the organisms whose fossil remains define them show evolutionary changes through geologic time...". It means labeling the zones from older (1) to younger (41), not in reverse order, please.
Cheers,
Ines🌷


On Thu, 27 Mar 2025 at 12:26, Nicolas Rudolph Thibault <nt at ign.ku.dk<mailto:nt at ign.ku.dk>> wrote:
Hi Jeremy,

This is coming from the following reference:

Bergen, J.A., Sikora, P.J., 1999. Microfossil diachronism in southern Norwegian North Sea chalks: Valhall and Hod fields, in: Jones, R.W., Simmons, M.D. (Eds.), Biostratigraphy in Production and Development Geology. Geological Society of London Special Publications 152, Geological Society, London, pp. 85-111.

It is somewhat useful for the North Sea, though mostly with similar events as used in the UC(BP) and UC ('i') zonations

I attach the paper hereby.

Cheers,
Nic
-----Original Message-----
From: Coccoliths <coccoliths-bounces at fcnym.unlp.edu.ar<mailto:coccoliths-bounces at fcnym.unlp.edu.ar>> On Behalf Of Young, Jeremy
Sent: 26. marts 2025 23:26
To: Coccoliths at fcnym.unlp.edu.ar<mailto:Coccoliths at fcnym.unlp.edu.ar>
Subject: [coccoliths] KN zonation

Hi
In TimeScaleCreator there is KN nannofossil zonation for the Late Cretaceous, with zones from KN1 at the top of the Maastrichtain to KN40 in Cenomanian.  However, I can't find this zonation anywhere else. Does anyone know where it comes from, and if it has any continuing value?
Jeremy
_______________________________________________
Coccoliths mailing list
Coccoliths at fcnym.unlp.edu.ar<mailto:Coccoliths at fcnym.unlp.edu.ar>
https://webmail.fcnym.unlp.edu.ar/mailman/listinfo/coccoliths<https://url41.mailanyone.net/scanner?m=1ty8yv-000000003W8-3DdS&d=4%7Cmail%2F90%2F1743165600%2F1ty8yv-000000003W8-3DdS%7Cin41k%7C57e1b682%7C15209072%7C14343128%7C67E6985129DD2A96A273C6A6E3B75608&o=%2Fphte%3A%2Fwtscibmy.fnalenm.up.dull%2F.aaaimrmnin%2Fotiflsic%2Fcholtocs&s=pXePuWdBXQj6l1xSPs8kIhHeZng>
_______________________________________________
Coccoliths mailing list
Coccoliths at fcnym.unlp.edu.ar<mailto:Coccoliths at fcnym.unlp.edu.ar>
https://webmail.fcnym.unlp.edu.ar/mailman/listinfo/coccoliths<https://url41.mailanyone.net/scanner?m=1ty8yv-000000003W8-3DdS&d=4%7Cmail%2F90%2F1743165600%2F1ty8yv-000000003W8-3DdS%7Cin41k%7C57e1b682%7C15209072%7C14343128%7C67E6985129DD2A96A273C6A6E3B75608&o=%2Fphte%3A%2Fwtscibmy.fnalenm.up.dull%2F.aaaimrmnin%2Fotiflsic%2Fcholtocs&s=pXePuWdBXQj6l1xSPs8kIhHeZng>


--
Bryan C. Ladner
Tel:  228 806 9157
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://webmail.fcnym.unlp.edu.ar/pipermail/coccoliths/attachments/20250328/8c041c85/attachment.htm>