SSF diversification, first brachiopods & archaeocyatha
←
First halkieriids, mollusсs, hyoliths SSF
←
Baykonurian glaciation
←
Dresbachian extinction
Major Glacial period
Subdivision of the Cambrian according to the ICS, as of 2022.[1] Vertical axis scale: millions of years ago
Etymology
Name formality
Informal
Usage information
Celestial body
Earth
Regional usage
Global (ICS)
Time scale(s) used
ICS Time Scale
Definition
Chronological unit
Age
Stratigraphic unit
Stage
Time span formality
Formal
Lower boundary definition
Not formally defined
Lower boundary definition candidates
FAD of Trilobites
Lower boundary GSSP candidate section(s)
None
Upper boundary definition
Not formally defined
Upper boundary definition candidates
FAD of the Trilobites Olenellus or Redlichia
Upper boundary GSSP candidate section(s)
None
Cambrian Stage 3 is the still unnamed third stage of the Cambrian. It succeeds Cambrian Stage 2 and precedes Cambrian Stage 4, although neither its base nor top have been formally defined. The plan is for its lower boundary to correspond approximately to the first appearance of trilobites, about 521 million years ago,[2] though the globally asynchronous appearance of trilobites warrants the use of a separate, globally synchronous marker to define the base.[3] The upper boundary and beginning of Cambrian Stage 4 is informally defined as the first appearance of the trilobite genera Olenellus or Redlichia around 514 million years ago.[4]
^"Chart/Time Scale". stratigraphy.org. International Commission on Stratigraphy.
^Ahlberg, Per; Babcock, Loren E. "Subcommission on Cambrian Stratigraphy Annual Report 2017" (PDF). International Commission on Stratigraphy. Archived (PDF) from the original on 2023-07-16. Retrieved 2024-03-27.
^"ISCS Working Groups: Working Group on the Stage 3 GSSP". International Subcommission on Cambrian Stratigraphy. Archived from the original on 2023-09-26.
^"GSSP Table - Paleozoic Era". Geologic Timescale Foundation. Archived from the original on 2023-10-08. Retrieved 2024-03-27.
CambrianStage3 is the still unnamed third stage of the Cambrian. It succeeds CambrianStage 2 and precedes CambrianStage 4, although neither its base...
CambrianStage 4 is the still unnamed fourth stage of the Cambrian and the upper stage of Cambrian Series 2. It follows CambrianStage3 and lies below...
Stage 2 of the Cambrian is the unnamed upper stage of the Terreneuvian Series. It lies atop the Fortunian and below Stage3 of the Cambrian. It is commonly...
Stage 10 of the Cambrian is the still unnamed third and final stage of the Furongian series. It follows the Jiangshanian and precedes the Ordovician Tremadocian...
The Cambrian ( /ˈkæmbri.ən, ˈkeɪm-/ KAM-bree-ən, KAYM-) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted...
order of stem-group arthropods that was successful worldwide during the Cambrian period. They may be referred to as radiodonts, radiodontans, radiodontids...
panarthropod animal known from the Cambrian of China. It is known from only a single species, P. atavus, found in the CambrianStage3 aged Chengjiang Biota of...
Chinese Maotianshan shales of Yunnan. It is dated to CambrianStage3 and belongs to late Early Cambrian strata. Scleroctenophorans are easily distinguished...
The Cambrian explosion (also known as Cambrian radiation or Cambrian diversification) is an interval of time approximately 538.8 million years ago in the...
Yuheng; Fu, Dongjing (January 2022). "A new bivalved arthropod from the Cambrian (Stage3) Qingjiang biota expands the palaeogeographical distribution and increases...
Thulaspis is an extinct genus of artiopodan arthropod from the CambrianStage3 aged Sirius Passet site in Greenland. It is thought to be a close relative...
termed Qiongzhusian, a stage correlated to the late Atdabanian Stage in Siberian sequences of the middle of the Early Cambrian. The shales date to ≤518 million...
fragments). The Poleta Formation is correlated with the as-yet unratified CambrianStage3 (Series 2), giving it a provisional date of ~516 million years ago...
the CambrianStage3 Mickwitzia Sandstone (Sweden), providing evidence of diversification of molluscan radulae which happened by the early Cambrian. Evidence...
Kerygmachela kierkegaardi is a kerygmachelid gilled lobopodian from the CambrianStage3 aged Sirius Passet Lagerstätte in northern Greenland. Its anatomy strongly...
Chengjiang Biota of China, which dates to approximately 520 Ma, during CambrianStage3. Omnidens-like mouthparts have also been found in the slightly younger...
Fu, Dongjing (7 March 2024). "A new radiodont from the lower Cambrian (Series 2 Stage3) Chengjiang Lagerstätte, South China informs the evolution of...
appeared during the Cambrian Period. The oldest putative calcarean genus is Gravestockia, from the "Atdabanian" (CambrianStage3) of Australia. Calcareans...
Daniel J.; Chen, Junyuan (2018). "Geochronological constraint on the Cambrian Chengjiang biota, South China" (PDF). Journal of the Geological Society...
chaetognath (arrow worm relative) that lived about 520 million years ago, in the Cambrian. Its fossils are known from the Sirius Passet Lagerstätte in Greenland...
Hallucigenia is a genus of lobopodian known from Cambrian aged fossils in Burgess Shale-type deposits in Canada and China, and from isolated spines around...
Mantou Formation of North China, Sidneyia minor from the Early Cambrian (CambrianStage3) Xiaoshiba Biota of Yunnan, China, and a valid species of Sidneyia...
Lenisicaris is a Cambrian anomalocaridid radiodont, known from the Maotianshan Shales of China, and possibly the Kinzers Formation of Pennsylvania. Lenisicaris...
Chinese Maotianshan shales of Yunnan. It is dated to CambrianStage3 and belongs to late Early Cambrian strata. The species is remarkable for its set of...
Kinzers Formation of the United States. Their fossils date to stage3 and stage 4 of the Cambrian. Vinther J, Stein M, Longrich NR, Harper DA (March 2014)...
possible sister group of Hexapoda". Molecular Biology and Evolution. 29 (3): 1031–1045. doi:10.1093/molbev/msr270. PMID 22049065. Omar Rota-Stabelli;...
Miaolingian of Canada and Peytoia infercambriensis from Poland, dating to CambrianStage3. Its two frontal appendages had long bristle-like spines, it had no...
Global Information