Earth:Bradgate Formation

From HandWiki
Bradgate Formation
Stratigraphic range: Ediacaran 561–557 Ma[1]
↓
Bradgate Park, which gave the name to the formation, which itself can be found here.
TypeFormation
Unit ofMaplewell Group
Sub-unitsHallgate and Sliding Stone Slump Breccia Members
UnderliesHanging Rocks Formation[2]
OverliesBeacon Hill Formation[2]
Thickness649 m (2,129 ft)[2]
Lithology
PrimaryPelite
OtherTuff, Graywacke, Breccia
Location
RegionLeicestershire
CountryUnited Kingdom
Type section
Named forBradgate Park

The Bradgate Formation is a geologic formation in Leicestershire, and lies within the wider Bradgate Park area. It preserves fossils dating back to the Lower Ediacaran period.

Paleobiota

The Bradgate Formation contains the richest fossil beds within the Charnian Supergroup, from frondose organisms like Bradgatia and Charnia, which when the latter was discovered, showed definitive proof that macroscopic life did indeed exist before the Cambrian,[3] to discoid forms like Aspidella.

Template:Paleobiota-key-compact

Petalonamae

Genus Species Notes Images
Bradgatia[4]
  • B. linfordensis
 Sessile frondose organism.
Charnia[3]
  • C. masoni
 Sessile frondose organism, and first organism found within this formation.
Charniodiscus[3]
  • C. concentricus
 Sessile frondose organism.
Hylaecullulus[5]
  • H. fordi
 Sessile frondose organism.
Primocandelabrum[6]
  • P. aelfwynnia
  • P. aethelflaedia
  • P. boyntoni
 Sessile frondose organism.
Vinlandia[7]
  • V. antecedens
 Sessile frondose organism.

Cnidaria

Genus Species Notes Images
Auroralumina[8]
  • A. attenboroughii
 Early sessile crown-group medusozoan cnidarian.

incertae sedis

Genus Species Notes Images
Aspidella[9]
  • Aspidella sp.
 Enigmatic discoidal fossil.
Thectardis[9]
  • T. avalonensis
 Discoid organism, possibly holdfasts of petalonamids.

Undescribed forms

Genus Species Notes Images
Gladius form[4]
  • ???
 Enigmatic fossil, described to be in the shape of a gladius sword.
Hemispherical form[4]
  • ???
 Enigmatic fossil, described to be hemispherical in shape, with bifurcating radial ribs.
Lanceolate frond[10]
  • ???
 Enigmatic frondose fossil, described to be in the shape of a lance head, which has collapsed in onto itself.

See also

  • List of fossiliferous stratigraphic units in England

References

  1. ↑ Noble, Stephen R.; Condon, Daniel J.; Carney, John N.; Wilby, Philip R.; Pharaoh, Timothy C.; Ford, Trevor D. (January 2015). "U-Pb geochronology and global context of the Charnian Supergroup, UK: Constraints on the age of key Ediacaran fossil assemblages". Geological Society of America Bulletin 127 (1-2): 250–265. doi:10.1130/B31013.1. 
  2. ↑ 2.0 2.1 2.2 Moseley, John; Ford, Trevor. "The Sedimentology of the Charnian Supergroup". Mercian Geologist. https://www.emgs.org.uk/uploads/1/4/9/1/149143154/mg11_4_1989_251_moseley_ford_sedimentology_of_the_charnian_supergroup_2.pdf. 
  3. ↑ 3.0 3.1 3.2 Ford, T. D. (September 1958). "PRE-CAMBRIAN FOSSILS FROM CHARNWOOD FOREST". Proceedings of the Yorkshire Geological Society 31 (3): 211–217. doi:10.1144/pygs.31.3.211. 
  4. ↑ 4.0 4.1 4.2 Kenchington, Charlotte G.; Harris, Simon J.; Vixseboxse, Philip B.; Pickup, Chris; Wilby, Philip R. (June 2018). "The Ediacaran fossils of Charnwood Forest: Shining new light on a major biological revolution". Proceedings of the Geologists' Association 129 (3): 264–277. doi:10.1016/j.pgeola.2018.02.006. 
  5. ↑ Kenchington, Charlotte G.; Dunn, Frances S.; Wilby, Philip R. (October 2018). "Modularity and Overcompensatory Growth in Ediacaran Rangeomorphs Demonstrate Early Adaptations for Coping with Environmental Pressures". Current Biology 28 (20): 3330–3336.e2. doi:10.1016/j.cub.2018.08.036. 
  6. ↑ Kenchington, Charlotte G.; Wilby, Philip R. (January 2017). "Rangeomorph classification schemes and intra-specific variation: are all characters created equal?". Geological Society, London, Special Publications 448 (1): 221–250. doi:10.1144/SP448.19. 
  7. ↑ Brasier, Martin D.; Antcliffe, Jonathan B.; Liu, Alexander G. (September 2012). "The architecture of Ediacaran Fronds". Palaeontology 55 (5): 1105–1124. doi:10.1111/j.1475-4983.2012.01164.x. 
  8. ↑ Dunn, F. S.; Kenchington, C. G.; Parry, L. A.; Clark, J. W.; Kendall, R. S.; Wilby, P. R. (25 July 2022). "A crown-group cnidarian from the Ediacaran of Charnwood Forest, UK". Nature Ecology & Evolution 6 (8): 1095–1104. doi:10.1038/s41559-022-01807-x. 
  9. ↑ 9.0 9.1 Wilby, Philip R.; Carney, John N.; Howe, Michael P.A. (1 July 2011). "A rich Ediacaran assemblage from eastern Avalonia: Evidence of early widespread diversity in the deep ocean". Geology 39 (7): 655–658. doi:10.1130/G31890.1. 
  10. ↑ Bowers, Aron. "Further Precambrian (Ediacaran) fossil discoveries in Charnwood Forest, Leicestershire". Mercian Geologist. https://www.monash.edu/__data/assets/pdf_file/0009/85626/mercian-2014-v18-p175-further-ediacaran-fossils-charwood-forest-bowers.pdf. 



Retrieved from "https://handwiki.org/wiki/index.php?title=Earth:Bradgate_Formation&oldid=3994634"