Bradgate Formation

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Bradgate Formation
Stratigraphic range: Ediacaran 561–557 Ma[1]
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File:Bradgate park rocks.jpg
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

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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.

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Petalonamae

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Genus Species Notes Images
Bradgatia[4]
  • B. linfordensis
 Sessile frondose organism.
File:Bradgatia.svg
Charnia[3]
  • C. masoni
 Sessile frondose organism, and first organism found within this formation.
File:Charnia.png
Charniodiscus[3]
  • C. concentricus
 Sessile frondose organism.
File:Charniodiscus.png
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.
File:Vinlandia.jpg

Cnidaria

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

incertae sedis

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

Undescribed forms

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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

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References

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