The formationsformation consists of mudstone and siltstone, partly [[Lamination (geology)|laminated]] and [[AsphaltBitumen|bituminous]], medium to dark grey in colour, with rare fine grained calcareous sandstone beds. [[Limestone]] and [[Phosphorite|phosphatic]] [[Nodule (geology)|nodules]] are present at some levels.<ref name="BGS">{{Cite web|title=Whitby Mudstone Formation|url=http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=WHM|website=The BGS Lexicon of Named Rock Units|publisher=[[British Geological Survey]]}}</ref>

|NHMUK PV R 36712, Humerus<ref>{{Cite journal|last1=O’Sullivan|first1=Michael|last2=Rigby|first2=Martin|date=April 2017|title=The first evidence of a Campylognathoides —like pterosaur in the Toarcian (Lower Jurassic) Whitby Mudstone Formation of Lincolnshire, England|journal=Proceedings of the Geologists' Association|language=en|volume=128|issue=2|pages=287–291|doi=10.1016/j.pgeola.2016.12.009|bibcode=2017PrGA..128..287O }}</ref>

|Single partial skull lacking the snout (GSM 3166), tentantive referral of a humerus and scapulocoracoid (NHMUK PV R36634).<ref>{{Cite journal|last1=O'Sullivan|first1=Michael|last2=Martill|first2=David M.|last3=Groocock|first3=David|date=December 2013|title=A pterosaur humerus and scapulocoracoid from the Jurassic Whitby Mudstone Formation, and the evolution of large body size in early pterosaurs|journal=Proceedings of the Geologists' Association|language=en|volume=124|issue=6|pages=973–981|doi=10.1016/j.pgeola.2013.03.002|bibcode=2013PrGA..124..973O }}</ref>

|YORYM G503, a partial skeleton<ref>{{Cite journal|last=Taylor|first=M. A.|date=May 1992|title=Taxonomy and taphonomy of Rhomaleosaurus zetlandicus (Plesiosauria, Reptilia) from the Toarcian (Lower Jurassic) of the Yorkshire coast|journal=Proceedings of the Yorkshire Geological Society|language=en|volume=49|issue=1|pages=49–55|doi=10.1144/pygs.49.1.49|bibcode=1992PYGS...49...49T |issn=0044-0604}}</ref>

Insect compression fossils are known from nodules found on Alderton Hill near [[Alderton, Gloucestershire|Alderton]] and [[Dumbleton]] in [[Gloucestershire]], including [[Alderton Hill Quarry]] and other nearby localities.<ref>{{Cite journal|last1=Kelly|first1=Richard S.|last2=Ross|first2=Andrew J.|last3=Coram|first3=Robert A.|date=2018|title=A Review of Necrotauliids from the Triassic/Jurassic of England (Trichoptera: Necrotauliidae)|journal=Psyche: A Journal of Entomology|volume=2018|pages=1–12|doi=10.1155/2018/6706120|issn=0033-2615|doi-access=free|hdl=1983/06ae01fb-06bc-41d0-bcbd-f7519cb07df6|hdl-access=free}}</ref>

* {{cite LSAjournal |lastlast1=O'Sullivan |firstfirst1=Michael |last2=Martill |first2=David M. |year=2017 |title=The taxonomy and systematics of Parapsicephalus purdoni (Reptilia: Pterosauria) from the Lower Jurassic Whitby Mudstone Formation, Whitby, U.K |url=https://researchportal.port.ac.uk/portal/files/8204570/The_taxonomy_and_systematics.pdf |journal=[[Historical Biology]] |volume=29 |issue=8 |pages=1009–1018 |accessdate=2020-03-12}}| {{doi|=10.1080/08912963.2017.1281919|bibcode=2017HBio...29.1009O }}

* {{cite LSAbook |editor-last=[[David B. Weishampel|Weishampel]] |editor-first=David B. |editor-last2=[[Peter Dodson|Dodson]] |editor-first2=Peter |editor-last3=[[Halszka Osmólska|Osmólska]] (eds.) |editor-first3=Halszka |year=2004 |title=The Dinosauria, 2nd |edition=2nd |url=https://books.google.com/books?id=vtZFDb_iw40C |publisherlocation=Berkeley:|publisher= University of California Press |pages=1–880 |accessdate=2019-02-21}}{{ISBN|isbn=0-520-24209-2}}