Cambrian Stage 10

Cambrian Stage 10
~489.5 – 485.4 ± 1.9 Ma
↓
Chronology
Etymology
Name formalityInformal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitAge
Stratigraphic unitStage
Time span formalityFormal
Lower boundary definitionNot formally defined
Lower boundary definition candidatesFAD of the Trilobite Lotagnostus americanus
Lower boundary GSSP candidate section(s)Duibian, Zhejiang, China
Upper boundary definitionFAD of the Conodont Iapetognathus fluctivagus.
Upper boundary GSSPGreenpoint section, Green Point, Newfoundland, Canada
49°40′58″N 57°57′55″W / 49.6829°N 57.9653°W / 49.6829; -57.9653
Upper GSSP ratified2000[2]

Stage 10 of the Cambrian is the still unnamed third and final stage of the Furongian series.[3] It follows the Jiangshanian and precedes the Ordovician Tremadocian Stage.[4] The proposed lower boundary is the first appearance of the trilobite Lotagnostus americanus around 489.5 million years ago, but other fossils are also being discussed (see below). The upper boundary is defined as the appearance of the conodont Iapetognathus fluctivagus which marks the beginning of the Tremadocian and is radiometrically dated as 485.4 million years ago.[5]

  1. ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. September 2023. Retrieved November 10, 2024.
  2. ^ Cooper, Roger; Nowlan, Godfrey; Williams, S. H. (March 2001). "Global Stratotype Section and Point for base of the Ordovician System" (PDF). Episodes. 24 (1): 19–28. doi:10.18814/epiiugs/2001/v24i1/005. Archived (PDF) from the original on 2023-11-27. Retrieved 2024-03-25.
  3. ^ "Latest version of international chronostratigraphic chart". International Commission on Stratigraphy. Retrieved 2024-03-25.
  4. ^ "Stratigraphic Chart". International Commission on Stratigraphy. Archived from the original on 2012-10-30. Retrieved 2024-03-25.
  5. ^ "GSSP Table - Paleozoic Era". Geologic Timescale Foundation. Archived from the original on 2023-10-08. Retrieved 2024-03-25.