Back الدرومي (الكمبري) Arabic Друмий Bulgarian Drumium German Drumiense Spanish درومین FA Drumien French Drumium ID ドラミアン Japanese Drumien Dutch Drum (geologia) Polish
| Drumian | ||||||||||||||||||||||||||||||||||||||
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| Chronology | ||||||||||||||||||||||||||||||||||||||
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| Etymology | ||||||||||||||||||||||||||||||||||||||
| Name formality | Formal | |||||||||||||||||||||||||||||||||||||
| Name ratified | 2006[2] | |||||||||||||||||||||||||||||||||||||
| Former name(s) | Cambrian Stage 6 | |||||||||||||||||||||||||||||||||||||
| Usage information | ||||||||||||||||||||||||||||||||||||||
| Celestial body | Earth | |||||||||||||||||||||||||||||||||||||
| Regional usage | Global (ICS) | |||||||||||||||||||||||||||||||||||||
| Time scale(s) used | ICS Time Scale | |||||||||||||||||||||||||||||||||||||
| Definition | ||||||||||||||||||||||||||||||||||||||
| Chronological unit | Age | |||||||||||||||||||||||||||||||||||||
| Stratigraphic unit | Stage | |||||||||||||||||||||||||||||||||||||
| First proposed by | Babcock et al., 2006[3] | |||||||||||||||||||||||||||||||||||||
| Time span formality | Formal | |||||||||||||||||||||||||||||||||||||
| Lower boundary definition | FAD of the Trilobite Ptychagnostus atavus | |||||||||||||||||||||||||||||||||||||
| Lower boundary GSSP | Drumian section, Wheeler Shale, Utah, U.S.A. 39°30′42″N 112°59′29″W / 39.5117°N 112.9915°W | |||||||||||||||||||||||||||||||||||||
| Lower GSSP ratified | 2006[2] | |||||||||||||||||||||||||||||||||||||
| Upper boundary definition | FAD of the Trilobite Lejopyge laevigata | |||||||||||||||||||||||||||||||||||||
| Upper boundary GSSP | Luoyixi section, Luoyixi, Guzhang, Hunan, China 28°43′12″N 109°57′53″E / 28.7200°N 109.9647°E | |||||||||||||||||||||||||||||||||||||
| Upper GSSP ratified | 2008[4] | |||||||||||||||||||||||||||||||||||||
39°30′42″N 112°59′29″W / 39.5117°N 112.9915°W 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.
- ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. September 2023. Retrieved December 16, 2024.
- ^ a b Babcock, Loren; Robison, Richard; Rees, Margaret; Peng, Shanchi; Saltzman, Matthew (June 2007). "The Global boundary Stratotype Section and Point (GSSP) of the Drumian Stage (Cambrian) in the Drum Mountains, Utah, USA" (PDF). Episodes. 30 (2): 85–89. doi:10.18814/epiiugs/2007/v30i2/003. Archived (PDF) from the original on 2024-03-28. Retrieved 2024-04-03.
- ^ Babcock, Loren; Robinson, Richard; Rees, Margaret; Shanchi, Peng; Saltzman, Matthew. "PROPOSED GLOBAL STANDARD STRATOTYPE-SECTION AND POINT FOR THE DRUMIAN STAGE (CAMBRIAN)" (PDF). International Subcommission on Cambrian Stratigraphy. Archived (PDF) from the original on 2020-07-09. Retrieved 2024-04-03.
- ^ Peng, Shanchi; Babcock, Loren; Zuo, Jingxun; Lin, Huanling; Zhu, Xuejian; Yang, Xianfeng; Robison, Richard; Qi, Yuping; Bagnoli, Gabriella; Chen, Yong’an (March 2009). "The Global Boundary Stratotype Section and Point (GSSP) of the Guzhangian Stage (Cambrian) in the Wuling Mountains, Northwestern Hunan, China". Episodes. 32 (1): 41–55. doi:10.18814/epiiugs/2009/v32i1/006. Retrieved 2024-04-03.