Cambrian Stage 10

Short description: Final stage of the Cambrian Period

Cambrian Stage 10

~491 – 486.85 ± 1.5 Ma

PreЄ

Chronology

Cambrian graphical timeline

This box: view * talk * edit

-540 --

-535 --

-530 --

-525 --

-520 --

-515 --

-510 --

-505 --

-500 --

-495 --

-490 --

-485 --

Ediacaran

Fortunian

"Stage 2"

"Stage 3"

"Stage 4"

Wuliuan

Drumian

Guzhangian

Paibian

Jiangshanian

"Stage 10"

Tremadocian

Orsten Fauna

Burgess Shale

Kaili biota

Archaeocyatha extinction

Emu Bay Shale

Sirius Passet biota

Chengjiang biota

First Trilobites

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 2021.[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 the Trilobite Lotagnostus americanus
Lower boundary GSSP candidate section(s)| Duibian, Zhejiang, China
Upper boundary definition| FAD of the Conodont Iapetognathus fluctivagus.
Upper boundary GSSP| Greenpoint section, Green Point, Newfoundland, Canada
[ ⚑ ] 49°40′58″N 57°57′55″W﻿ / ﻿49.6829°N 57.9653°W﻿ / 49.6829; -57.9653
GSSP ratified| 2000[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]

## Contents

* 1 Naming
* 2 Stratotype
* 3 Subdivisions
* 4 References
* 5 External links

## Naming

The 10th stage of the Cambrian has not been formally named by the ICS yet,[3] although a number of local names exist. Several authors favor the name "Lawsonian" after Lawson Cove, in the Wah Wah Mountains of Utah.[6][7] The lower part of the North American Skullrockian Stage corresponds roughly to the Cambrian Stage 10.[8] The name "Nelegerian", after the Neleger River in Yakutia, was also proposed in 2011.[9]

## Stratotype

The ICS is still discussing which geological section and biostratigraphic marker will be used to define the base of the 10th Cambrian stage.[10][11]

Likely candidates for the section are still investigated. A first proposal was a section near Duibian, Zhejiang province (China). Note recent publications favor Steamboat Pass in the House Range of Utah. If a conodont is used for the base the stage then many more sections would be likely candidates for the GSSP, e.g. in Australia, Kazakhstan and Canada.[6]

Candidates for the biostratigraphic marker are the first appearance of a trilobite or conodont species. The trilobite Lotagnostus americanus was first suggested by the ICS, but has proven to be problematic.[6][12] In 2006 another working group proposed the first appearance of Cordylodus andresi.[13] The first appearance of Eoconodontus notchpeakensis is favored by many authors because it is globally widespread and is independent of facies (known from continental rise to peritidal environments).[6]

The Eoconodontus notchpeakensis proposal would also incorporate a non-biostratigraphic marker to correlate the beginning of stage 10 globally. A carbon isotope excursion (the HERB-event) occurs in the lower part of the E. notchpeakensis range.[6]

## Subdivisions

Cambrian Stage 10 can be subdivided using different biostratigraphic zones. Several conodont zone and subzones can be distinguished. The same is true for trilobites.[6]

## References

1. ↑ "Chart/Time Scale". International Commission on Stratigraphy. http://www.stratigraphy.org/index.php/ics-chart-timescale.
2. ↑ Cooper, Roger; Nowlan, Godfrey; Williams, S. H. (March 2001). "Global Stratotype Section and Point for base of the Ordovician System". Episodes 24 (1): 19–28. doi:10.18814/epiiugs/2001/v24i1/005. https://stratigraphy.org/gssps/files/tremadocian.pdf. Retrieved 2024-03-25.
3. ↑ 3.0 3.1 "Latest version of international chronostratigraphic chart". International Commission on Stratigraphy. https://stratigraphy.org/chart#latest-version.
4. ↑ "Stratigraphic Chart". International Commission on Stratigraphy. http://stratigraphy.org/column.php?id=Chart/Time Scale.
5. ↑ "GSSP Table - Paleozoic Era". Geologic Timescale Foundation. https://engineering.purdue.edu/Stratigraphy/gssp/index.php?parentid=77.
6. ↑ 6.0 6.1 6.2 6.3 6.4 6.5 Landing, E.; Westrop, S.R.; Adrain, J.M. (19 September 2011). "The Lawsonian Stage - the Eoconodontus notchpeakensis FAD and HERB carbon isotope excursion define a globally correlatable terminal Cambrian stage". Bulletin of Geosciences: 621–640. doi:10.3140/bull.geosci.1251. http://www.geology.cz/bulletin/fulltext/1251_Landing.pdf.
7. ↑ Miller, J.F.; Evans, K.R.; Freeman, R.L.; Ripperdan, R.L.; Taylor, J.F. (4 August 2011). "Proposed stratotype for the base of the Lawsonian Stage (Cambrian Stage 10) at the First Appearance Datum of Eoconodontus notchpeakensis (Miller) in the House Range, Utah, USA". Bulletin of Geosciences: 595–620. doi:10.3140/bull.geosci.1255.
8. ↑ Freeman, Rebecca L.; Miller, James F.; Dattilo, Benjamin F. (September 2018). "Linguliform brachiopods across a Cambrian–Ordovician (Furongian, Early Ordovician) biomere boundary: the Sunwaptan–Skullrockian North American Stage boundary in the Wilberns and Tanyard formations of central Texas". Journal of Paleontology 92 (5): 751–767. doi:10.1017/jpa.2018.8. Bibcode: 2018JPal...92..751F.
9. ↑ N. P. Lazarenko, Ivan Ya. Gogin, T. V. Pegel, G. P. Abaimova (2011). "The Khos-Nelege River section of the Ogon'or Formation: a potential candidate for the GSSP of Stage 10, Cambrian System". Bulletin of Geosciences 86 (3): 555–568. doi:10.3140/bull.geosci.1270. https://www.researchgate.net/publication/270213769.
10. ↑ "ISCS Working Groups: Working Group on the Stage 10 GSSP". International Subcommission on Cambrian Stratigraphy. http://www.palaeontology.geo.uu.se/ISCS/ISCS_working_groups.html#6.
11. ↑ P. Yu. Parkhaev, Yu. E. Demidenko, M. A. Kulsha (2020). "Zooproblematica Mobergella radiolata as Index Species of the Lower Cambrian Stage Units". Стратиграфия. Геологическая корреляция 28 (2): 34. doi:10.31857/S0869592X20020064. http://csl.isc.irk.ru/bd/Журналы/Стратиграфия. Геологическая корреляция 2020 Т28/№ 2/33-54.pdf#page=2.
12. ↑ James Frederick Miller (2019). "Study and Use of Upper Cambrian to Lower Ordovician conodonts in central, southern, and western Laurentia, 1933–2018" (in en). Palaeobiodiversity and Palaeoenvironments 100 (4): 95–133. doi:10.1007/s12549-019-00380-9.
13. ↑ Miller, James F.; Ethington, Raymond L.; Evans, Kevin R.; Holmer, Lars E.; Loch, James D.; Popov, Leonid E.; Repetski, John E.; Ripperdan, Robert L. et al. (31 July 2006). "Proposed stratotype for the base of the highest Cambrian stage at the first appearance datum of Cordylodus andresi, Lawson Cove section, Utah, USA". Palaeoworld 15 (3–4): 384–405. doi:10.1016/j.palwor.2006.10.017.

## External links

* "GSSPs - The Cambrian System 2019". International Commission on Stratigraphy. http://www.palaeontology.geo.uu.se/ISCS/ISCS_GSSPs.html.
* "GSSP Table - Paleozoic Era". https://timescalefoundation.org/gssp/index.php?parentid=77.

* v
* t
* e

Geological history of Earth

Cenozoic era
(present–66.0 Mya)|

| Quaternary (present–2.588 Mya)|

* Holocene (present–11.784 kya)
* Pleistocene (11.784 kya–2.588 Mya)

|

Neogene (2.588–23.03 Mya)|

* Pliocene (2.588–5.333 Mya)
* Miocene (5.333–23.03 Mya)

Paleogene (23.03–66.0 Mya)|

* Oligocene (23.03–33.9 Mya)
* Eocene (33.9–56.0 Mya)
* Paleocene (56.0–66.0 Mya)

Mesozoic era
(66.0–251.902 Mya)|

| Cretaceous (66.0–145.0 Mya)|

* Late (66.0–100.5 Mya)
* Early (100.5–145.0 Mya)

|

Jurassic (145.0–201.3 Mya)|

* Late (145.0–163.5 Mya)
* Middle (163.5–174.1 Mya)
* Early (174.1–201.3 Mya)

Triassic (201.3–251.902 Mya)|

* Late (201.3–237 Mya)
* Middle (237–247.2 Mya)
* Early (247.2–251.902 Mya)

Paleozoic era
(251.902–541.0 Mya)|

| Permian (251.902–298.9 Mya)|

* Lopingian (251.902–259.8 Mya)
* Guadalupian (259.8–272.3 Mya)
* Cisuralian (272.3–298.9 Mya)

|

Carboniferous (298.9–358.9 Mya)|

* Pennsylvanian (298.9–323.2 Mya)
* Mississippian (323.2–358.9 Mya)

Devonian (358.9–419.2 Mya)|

* Late (358.9–382.7 Mya)
* Middle (382.7–393.3 Mya)
* Early (393.3–419.2 Mya)

Silurian (419.2–443.8 Mya)|

* Pridoli (419.2–423.0 Mya)
* Ludlow (423.0–427.4 Mya)
* Wenlock (427.4–433.4 Mya)
* Llandovery (433.4–443.8 Mya)

Ordovician (443.8–485.4 Mya)|

* Late (443.8–458.4 Mya)
* Middle (458.4–470.0 Mya)
* Early (470.0–485.4 Mya)

Cambrian (485.4–541.0 Mya)|

* Furongian (485.4–497 Mya)
* Miaolingian (497–509 Mya)
* Series 2 (509–521 Mya)
* Terreneuvian (521–541.0 Mya)

Proterozoic eon
(541.0 Mya–2.5 Gya)|

| Neoproterozoic (541.0 Mya–1 Gya)|

* Ediacaran (541.0–~635 Mya)
* Cryogenian (~635–~720 Mya)
* Tonian (~720 Mya–1 Gya)

|

Mesoproterozoic (1–1.6 Gya)|

* Stenian (1–1.2 Gya)
* Ectasian (1.2–1.4 Gya)
* Calymmian (1.4–1.6 Gya)

Paleoproterozoic (1.6–2.5 Gya)|

* Statherian (1.6–1.8 Gya)
* Orosirian (1.8–2.05 Gya)
* Rhyacian (2.05–2.3 Gya)
* Siderian (2.3–2.5 Gya)

Archean eon (2.5–4 Gya)|

| Eras|

* Neoarchean (2.5–2.8 Gya)
* Mesoarchean (2.8–3.2 Gya)
* Paleoarchean (3.2–3.6 Gya)
* Eoarchean (3.6–4 Gya)

|

Hadean eon (4–4.6 Gya)|

|  |

|

kya = thousands years ago. Mya = millions years ago. Gya = billions years ago.
See also: Geologic time scale

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/Cambrian Stage 10. Read more

|

Retrieved from "https://handwiki.org/wiki/index.php?title=Earth:Cambrian_Stage_10&oldid=3998363"
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template