GCMD Chronostratigraphic Units Types Keywords

STAGE 4

https://gcmdservices.gsfc.nasa.gov/kms/concept/81103299-c23d-4a11-9a04-c1041fea5d1b

broader
https://gcmdservices.gsfc.nasa.gov/kms/concept/c98a4c91-1b1d-464d-8380-497a186db7eb original
narrower
81103299-c23d-4a11-9a04-c1041fea5d1b original
change note
2019-12-17 13:13:33.0 [tstevens] Insert Concept
add broader relation (STAGE 4 [81103299-c23d-4a11-9a04-c1041fea5d1b,532331] - SERIES 2 [c98a4c91-1b1d-464d-8380-497a186db7eb,532299]);
2019-12-19 08:04:03.0 [tstevens]
insert Definition (id: null
text: Cambrian Stage 4 is the still unnamed fourth stage of the Cambrian and the upper stage of Cambrian Series 2. It follows Cambrian Stage 3 and lies below the Wuliuan. The lower boundary has not been formally defined by the International Commission on Stratigraphy. One proposal is the first appearance of two trilobite genera, Olenellus or Redlichia. Another proposal is the first appearance of the trilobite species Arthricocephalus chauveaui. Both proposals will set the lower boundary close to 514 million years ago. The upper boundary corresponds to the beginning of the Wuliuan.
language code: en);
definition Cambrian Stage 4 is the still unnamed fourth stage of the Cambrian and the upper stage of Cambrian Series 2. It follows Cambrian Stage 3 and lies below the Wuliuan. The lower boundary has not been formally defined by the International Commission on Stratigraphy. One proposal is the first appearance of two trilobite genera, Olenellus or Redlichia. Another proposal is the first appearance of the trilobite species Arthricocephalus chauveaui. Both proposals will set the lower boundary close to 514 million years ago. The upper boundary corresponds to the beginning of the Wuliuan.
type
Resource original
Concept original
in scheme chronounits original