Hi Laura,

   I fully agree with Björn and Jiri that a detailed and hierarchical timescale is essential. Attached is an example that we use at NRM PAL. The numerical ages are a few years old but should mostly be correct. And they can be used for sorting or validation; i.e., if a range of ages is given, the upper stage should not be allowed to be older than the lower stage.

Cheers, Steffen


Von: cetaf_earthsc@cetaf.simplelists.com <cetaf_earthsc@cetaf.simplelists.com> im Auftrag von Jiří Frank <jiri_frank@nm.cz>
Gesendet: Montag, 14. Oktober 2019 16:52:41
An: cetaf_earthsc@cetaf.simplelists.com; cetaf_earthsc@cetaf.simplelists.com
Betreff: Re[2]: [CETAF_ESG] Advice need: about how earth science collections defined stratigraphically in institutions.
 
Dear Laura,

same here. The international and official valid scale for chronostratigraphy is here. http://stratigraphy.org/index.php/ics-chart-timescale 

Indeed especially column Stage/age is important in combination with local Lithostratigraphy units, this is usually the most important information related to specimen localisation. (together with locality and taxonomy).

Best regards,
Jiri

------ Původní zpráva ------
Od: "Kröger, Björn" <bjorn.kroger@helsinki.fi>
Komu: "cetaf_earthsc@cetaf.simplelists.com" <cetaf_earthsc@cetaf.simplelists.com>
Odesláno: 14. 10. 2019 16:23:55
Předmět: Re: [CETAF_ESG] Advice need: about how earth science collections defined stratigraphically in institutions.

Hello Laura,

I am not 100% sure what for these categories are needed and why there is some constraint for the number of categories. But properly defined global chronostratigraphic units are the only choice and I would also go for a hierarchical solution with codes for e.g. the Mesozoic unspecified and then lower in the hierarchy toward the periods. The latest international standard can be found here:  http://stratigraphy.org/index.php/ics-chart-timescale

Kind regards,

Björn

 

 

From: <cetaf_earthsc@cetaf.simplelists.com> on behalf of "laura.tilley@cetaf.org" <laura.tilley@cetaf.org>
Reply-To: "cetaf_earthsc@cetaf.simplelists.com" <cetaf_earthsc@cetaf.simplelists.com>
Date: Monday, 14 October 2019 at 17:10
To: ESG <cetaf_earthsc@cetaf.simplelists.com>
Subject: [CETAF_ESG] Advice need: about how earth science collections defined stratigraphically in institutions.

 

Dear colleagues,

 

I am writing to ask for some advice on how I should define the stratigraphic levels for the SYNTHESYS+ Collections Digitisation Dashboard. I have attached an excel sheet with classification of Stratigraphy from the  ICEDIG project (sheet 1 in black ink) – I have added some categories in red – but I think there are too many to be filled in. Could Precambrian material be lumped together?

 

I would like to ask do we need that many categories really? – based on how earth science collections are categorised in institutions.

Do you have any insight into how Earth Science collections are classified?

 

I need to add a category for unknown.

 

In sheet two, CSIC Madrid has given an alternative classification.

 

I would be grateful for any feedback before the end of this week.

 

Best wishes

 

Laura

 

Dr. Laura Tilley

Project Assistant

CETAF, AISBL

+32 (0) 2 627 42 50

laura.tilley@cetaf.org

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