The Lulworth Formation is a geologic formation in England. It dates from the late Tithonian to the mid Berriasian. It is a subunit of the Purbeck Group. In Dorset, it consists of three members, which are in ascending order, the Mupe Member, the Ridgway Member, and the Warbarrow Tout Member. The Mupe Member is typically 11 to 16 m thick and largely consists of marls and micrites with interbeds of calcareous mudstone. The Ridgeway Member is about 3 to 7 m thick and consists of in its western portion carbonaceous muds, marls and micrites, in the east the muds are replaced by micritic limestone. The Warbarrow Tout Member is 17 to 39 m thick and consists of limestone at the base and micrite and mudstone for the rest of the sequence, this member is the primary source of the vertebrate fossils within the formation. Elsewhere the unit is undifferentiated.
Vertebrate paleobiota
Amphibians Amphibians reported from the Lulworth FormationGenusSpeciesLocationStratigraphic positionMaterialNotesImagesApricosirenA. ensomiWorbarrow Tout MemberSalamanderCeltedens C. megacephalusWorbarrow Tout MemberAlbanerpetontidSunnybatrachusS. purbeckensisWorbarrow Tout MemberFrog, affinites to Discoglossidae?BatrachosauroididaeIndeterminateWorbarrow Tout MemberSalamander
Turtles Turtles reported from the Lulworth FormationGenusSpeciesLocationStratigraphic positionMaterialNotesImagesDorsetochelysD. typocardium, D. delairiBoth species probably represent the same taxonHelochelydra H. anglica HylaeochelysH. latiscutataPleurosternon P. bullocki
Lepidosaurs Lepidosaurs reported from the Lulworth FormationGenusSpeciesLocationStratigraphic positionMaterialNotesImagesBecklesiusIndeterminateDorsetisaurusD. hebetidens, D. purbeckensis Durotrigia D. triconidens HomoeosaurusIndeterminateRhynchocephalianOpisthias IndeterminateRhynchocephalianParamacellodusP. oweniParasaurillusP. pseudobtususParviraptor P. estesiStem-snakePseudosaurillusP. becklesiPurbicellaP. rageiSaurillusS. robustidens
Crocodyliformes Crocodyliformes reported from the Lulworth FormationGenusSpeciesLocationStratigraphic positionMaterialNotesImagescf. Bernissartia IndeterminateTeethGoniopholis IndeterminateNannosuchus N. gracilidensTheriosuchus T. pusillus
Dinosaurs Dinosaurs reported from the Lulworth FormationGenusSpeciesLocationStratigraphic positionMaterialNotesImagesEchinodonE. becklesii Durlston Bay, SwanageTeeth and dentaryA small heterodontosaurid OwenodonO. hoggiiDurlston Bay, Swanage Partial dentaryAn iguanodontoidNuthetesN. destructor Feather Quarry, Durlston Bay, SwanageTeeth, dentary fragmentSmall dromaeosaur
Mammals Mammals reported from the Lulworth FormationGenusSpeciesLocationStratigraphic positionMaterialNotesImagesAlbionbaatarA. denisaeSunnydown Farm QuarryAlbionbaataridaeAmblotheriumA. pusillum, A. soricinum, A. nanumMammal BedBolodonB. minor, B. crassidens, B. osborni, B. elongatus, B. falconeri Mammal BedPlagiaulacidaeChunnelodon C. alopekodesSunnydown Farm QuarryCtenacodon C. minorMammal BedAllodontidaeDorsetodonD. haysomi Sunnydown Farm QuarryPaurodontidaeDurlstotherium D. newmani Mammal BedDurlstodon D. ensomi Mammal BedGerhardodonG. purbeckensisSunnydown Farm QuarryPinheirodontidaeKouriogenys K. minorMammal BedPeramuridaeMagnimusM. ensomi Sunnydown Farm QuarryPeraiocynodon P. inexpectatusMammal BedDocodontidaePeramuroides P. tenuiscusMammal BedPeramuridaePeramus P. tenuirostris, P. dubius, P. minorMammal BedPeramuridaePeraspalaxP. talpoidesMammal Bed, Sunnydown Farm QuarryDryolestidae PhascolestesP. mustelulaMammal Bed, Sunnydown Farm QuarryDryolestidae PlagiaulaxP. becklesiiMammal BedPlagiaulacidaePurbeckodonP. bateiSunnydown Farm QuarryMorganucodontaSpalacotherium S. tricuspidens, S. evansae, S. hookeriMammal Bed, Sunnydown Farm QuarrySpalacotheriidaeSunnyodon S. notleyiSunnydown Farm QuarryPaulchoffatiidaeThereuodon T. taraktes Sunnydown Farm QuarryTinodon T. micronSunnydown Farm QuarryTinodontidaeTriconodon T. mordaxMammal Bed, Sunnydown Farm QuarryTrioracodon T. bisulcus, T. major, T. oweniMammal Bed, Feather Quarry
See also List of fossiliferous stratigraphic units in England List of dinosaur bearing rock formations
References