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MIDS Element - 10. GeologicalAge #61

Open emhaston opened 1 year ago

emhaston commented 1 year ago
Information Element GeologicalAge
Modified 2023/12/14
Label Geological Age
Definition Refers to the geological age of a Earth Science specimen (i.e. Fossil, Rock, Mineral or Meteorite) and can be any kind of stratigraphic age, isotopically determined age or structural age.
Purpose To provide information about the age of the geological, mineralogical, fossil or meteorite specimen.
Applicable standard(s)/recommendation(s) It is recommended follow the International Commission on Stratigraphy chart, and that litho- and biostratigraphy, where available, should also be provided.
Examples To be added
Required Yes (Geology & Palaeontology)
Constraints
Element specification status agreed; accepted in specification
Notes none
PipBrewer commented 1 year ago

MIDS level 2, I would say chronostratigraphy (from and to i.e., Miocene to Pliocene) should be mandatory for palaeontological objects and to the most granular level available.

Minimum of one of these: dwc:earliestAgeOrLowestStage dwc:earliestEpochOrLowestSeries dwc:earliestEraOrLowestErathem dwc:earliestPeriodOrLowestSystem

and one of these: dwc:latestAgeOrHighestStage dwc:latestEpochOrHighestSeries dwc:latestEraOrHighestErathem dwc:latestPeriodOrHighestSystem

Recommended that aligns with International Commission on Stratigraphy chart

Recommended that litho- and biostratigraphy, where available, should also be provided

emhaston commented 1 year ago

This needs input from the Geological and Palaeontological community.

smrgeoinfo commented 1 year ago

For the sample location stratigraphic context, need to distinguish lithostratigraphy (correlation of rock bodies base on similar lithology and lithology of overlying and underlying units), biostratigraphy (correlation of rock bodies base on similar fossil assemblages), and chronostratigraphy (correlation based on known or inferred depositional age). All of these are subject to various caveats and exceptions

PipBrewer commented 1 year ago

I would propose that chronostratigraphy is essential at MIDS 2 level for palaeontological specimens and that including lithostratigraphy and/or biostratigraphy is highly recommended (but not essential) at this level

PipBrewer commented 1 year ago

In my first comment on 29th September 2022, I forgot the following 2 terms as part of core terms for mids2:

dwc: earliestEonOrLowestEonothem dwc: latestEonOrHighestEonothem

PipBrewer commented 1 year ago

I would suggest definition to be: Terms denoting the names of strata and/or their age from which a specimen is derived

I would suggest purpose to be: To provide geological context to the specimen

emhaston commented 12 months ago

From meeting on 13 July 2023: Proposal to replace Stratigraphy with GeologicalAge Would map to DWC GeologicalContext terms https://dwc.tdwg.org/terms/#geologicalcontext Would map to ABCDEFG terms (Rachel can help provide these & Sam has also done some work here) How will it map to Latimer Core?

Term name updated