Earth:Patrick Burn Formation

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Patrick Burn Formation
Stratigraphic range: Upper Llandovery
TypeFormation
Unit ofPriesthill Group
UnderliesCastle Formation
OverliesPonesk Burn Formation (presumed, actual boundary is cut by a fault)
Thickness850 m
Lithology
PrimarySandstone, Siltstone, Mudstone
Location
RegionScotland
CountryUnited Kingdom

The Patrick Burn Formation is a Silurian aged geological formation outcropping near Lesmahagow in Lanarkshire in the Scottish Lowlands. Fossils are known from the formation, including from the Birk Knowes locality.[1][2]

Description

According to the British Geological Survey, the primary lithology of the formation consists of "Alternating beds of grey feldspathic, medium-grained turbiditic sandstone and grey siltstone with beds of grey laminated siltstone and silty mudstone."[3] The Birk Knowes site contains fossils from non-marine or marginal marine environment.[4] In 2000, Birk Knowes was closed by the Scottish government agency Scottish Natural Heritage (now NatureScot), due to the theft of specimens from the site by amateur collectors during the preceding decades, who essentially exhausted the fossiliferous deposit. At least some of the fossils ended up in a museum in Berlin, who refused to return them.[5][6][7][8]

Paleobiota

Arthropods

Arthropods
Species Notes Images
Slimonia acuminata A slimonid eurypterid.
Erettopterus bilobus A pterygotid eurypterid.
Selkiepterella lanceolata An adelophthalmid eurypterid, previously a species of Nanahughmilleria.[9]
Waterstonopterus lanarkensis A hardieopterid eurypterid, previously a species of Hardieopterus.
Loganamaraspis dunlopi A chasmataspidid.
Cyamocephalus loganensis A synziphosurine.
Pseudoniscus falcatus A synziphosurine.
Ainiktozoon loganense A thylacocephalan.
Ceratiocaris papilio A phyllocarid.

Chordates

Chordates
Species Notes Images
Loganellia scotica A loganelliid thelodont.
Jamoytius kerwoodi An enigmatic chordate.

See also

  • List of fossiliferous stratigraphic units in Scotland

References

  1. D., Dineley; S., Metcalf (1999). Fossil Fishes of Great Britain.. Geological Conservation Review Series. 16. Peterborough. ISBN 1-86107-470-0. https://hub.jncc.gov.uk/assets/f722dcd3-4cf1-46d8-9624-56abff537c8d. 
  2. Žigaitė, Živile; Goujet, Daniel (2012). "New observations on the squamation patterns of articulated specimens ofLoganellia scotica(Traquair, 1898) (Vertebrata: Thelodonti) from the Lower Silurian of Scotland". Geodiversitas 34 (2): 253–270. doi:10.5252/g2012n2a1. ISSN 1280-9659. http://dx.doi.org/10.5252/g2012n2a1. 
  3. "Patrick Burn Formation". British Geological Survey. https://webapps.bgs.ac.uk/lexicon/lexicon.cfm?pub=PKB. 
  4. Tetlie, O. Erik; Braddy, Simon J. (2003). "The first Silurian chasmataspid, Loganamaraspis dunlopi gen. et sp. nov. (Chelicerata: Chasmataspidida) from Lesmahagow, Scotland, and its implications for eurypterid phylogeny" (in en). Earth and Environmental Science Transactions of the Royal Society of Edinburgh 94 (3): 227–234. doi:10.1017/S0263593300000638. ISSN 1473-7116. https://www.cambridge.org/core/journals/earth-and-environmental-science-transactions-of-royal-society-of-edinburgh/article/abs/first-silurian-chasmataspid-loganamaraspis-dunlopi-gen-et-sp-nov-chelicerata-chasmataspidida-from-lesmahagow-scotland-and-its-implications-for-eurypterid-phylogeny/F2355DC34D69BB2A800023B67F4A4581. 
  5. Williams, Huw (2003). "Filched Fish Fossils". https://www.bbc.co.uk/radio4/today/reports/archive/science_nature/fossils.shtml. 
  6. Hose, Thomas A. (2012-04-01). "3G's for Modern Geotourism" (in en). Geoheritage 4 (1): 7–24. doi:10.1007/s12371-011-0052-y. ISSN 1867-2485. Bibcode2012Geohe...4....7H. https://doi.org/10.1007/s12371-011-0052-y. 
  7. Langlands, Eva (2023-09-01). "Looters destroy Scotland's fossil heritage sites" (in en). The Times. ISSN 0140-0460. https://www.thetimes.com/best-law-firms/profile-legal/article/looters-destroy-scotlands-fossil-heritage-sites-69kgjzjwzlp. 
  8. University of Glasgow 23 May 2002 MOVE TO HALT FOSSIL THEFT AND DAMAGE IN SCOTLAND
  9. Lamsdell, James C. (2025). "Codex Eurypterida: A Revised Taxonomy Based on Concordant Parsimony and Bayesian Phylogenetic Analyses" (in en). Bulletin of the American Museum of Natural History 2025 (473). doi:10.1206/0003-0090.473.1.1.full. ISSN 0003-0090. https://bioone.org/journals/bulletin-of-the-american-museum-of-natural-history/volume-2025/issue-473/0003-0090.473.1.1/Codex-Eurypterida--A-Revised-Taxonomy-Based-on-Concordant-Parsimony/10.1206/0003-0090.473.1.1.full. Retrieved 27 July 2025.