EntityQ43712· pop 15· linked from 101 articles

Drumian

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 million years ago. The top is defined as the first appearance of another trilobite Lejopyge laevigata around million years ago.

Key facts

Geologic timespan.name: Drumian
Geologic timespan.color: Drumian
Geologic timespan.time_start: 504.5
Geologic timespan.time_start_prefix: ~
Geologic timespan.time_end: 500.5
Geologic timespan.time_end_prefix: ~
Geologic timespan.timeline: Cambrian
Geologic timespan.name_formality: Formal
Geologic timespan.name_accept_date: 2006
Geologic timespan.former_names: Cambrian Stage 6
Geologic timespan.celestial_body: earth
Geologic timespan.usage: Global (ICS)
Geologic timespan.timescales_used: ICS Time Scale
Geologic timespan.chrono_unit: Age
Geologic timespan.strat_unit: Stage
Geologic timespan.proposed_by: Babcock et al., 2006
Geologic timespan.timespan_formality: Formal
Geologic timespan.lower_boundary_def: FAD of the Trilobite Ptychagnostus atavus

via Wikipedia infobox

Article

5 sections

Contents

GSSP
Major events
Paleontology
References
External links

==GSSP== The GSSP is defined in the Drumian section () in the Drum Mountains, Millard County, Utah, United States. The stage was also named after the Drum Mountains. The section is an outcrop of the Wheeler Formation, a succession of calcareous shales. The precise base of the Drumian is a laminated limestone above the base of the Wheeler Formation.