GCMD Chronostratigraphic Units Types Keywords

DRUMIAN

https://gcmdservices.gsfc.nasa.gov/kms/concept/dddaa5c1-3f72-44aa-9147-9b171782956b

broader
https://gcmdservices.gsfc.nasa.gov/kms/concept/ea5250b7-79a4-4f27-a5c5-9ebd41ab627b original
narrower
dddaa5c1-3f72-44aa-9147-9b171782956b original
change note
2019-12-17 13:12:50.0 [tstevens] Insert Concept
add broader relation (DRUMIAN [dddaa5c1-3f72-44aa-9147-9b171782956b,532323] - MIAOLINGIAN [ea5250b7-79a4-4f27-a5c5-9ebd41ab627b,532295]);
2019-12-19 08:04:58.0 [tstevens]
insert Definition (id: null
text: The Drumian is a stage of the Miaolingian Series of the Cambrian. It succeeds the Wuliuan and precedes the Guzhangian. The base is defined as the first appearance of the trilobite Ptychagnostus atavus around 504.5 million years ago. The top is defined as the first appearance of another trilobite Lejopyge laevigata around 500.5 million years ago.
language code: en);
definition The Drumian is a stage of the Miaolingian Series of the Cambrian. It succeeds the Wuliuan and precedes the Guzhangian. The base is defined as the first appearance of the trilobite Ptychagnostus atavus around 504.5 million years ago. The top is defined as the first appearance of another trilobite Lejopyge laevigata around 500.5 million years ago.
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in scheme chronounits original