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.[1] 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.[2] 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.[3] 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,[4] this member is the primary source of the vertebrate fossils within the formation.[5][6] Elsewhere the unit is undifferentiated.
Vertebrate paleobiota
Amphibians
Turtles
Lepidosaurs
Dinosaurs
| Dinosaurs reported from the Lulworth Formation |
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Echinodon | E. becklesii[10] | Durlston Bay, Swanage[10] | | Teeth and dentary | A small heterodontosaurid | |
| Owenodon | O. hoggii[11] | Durlston Bay, Swanage | | Partial dentary | An iguanodontoid | |
| Nuthetes | N. destructor[12] | Feather Quarry, Durlston Bay, Swanage | | Teeth, dentary fragment | Small dromaeosaur | |
Mammals
| Mammals reported from the Lulworth Formation |
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Albionbaatar | A. denisae | Sunnydown Farm Quarry | | | Albionbaataridae | |
| Amblotherium | A. pusillum, A. soricinum, A. nanum | Mammal Bed | | | | |
| Bolodon | B. minor, B. crassidens, B. osborni, B. elongatus, B. falconeri | Mammal Bed | | | Plagiaulacidae | |
| Chunnelodon | C. alopekodes | Sunnydown Farm Quarry | | | | |
| Ctenacodon | C. minor | Mammal Bed | | | Allodontidae | |
| Dorsetodon | D. haysomi | Sunnydown Farm Quarry | | | Paurodontidae | |
| Durlstotherium | D. newmani | Mammal Bed | | | | |
| Durlstodon | D. ensomi | Mammal Bed | | | | |
| Gerhardodon | G. purbeckensis | Sunnydown Farm Quarry | | | Pinheirodontidae | |
| Kouriogenys | K. minor | Mammal Bed | | | Peramuridae | |
| Magnimus | M. ensomi | Sunnydown Farm Quarry | | | | |
| Peraiocynodon | P. inexpectatus | Mammal Bed | | | Docodontidae | |
| Peramuroides | P. tenuiscus | Mammal Bed | | | Peramuridae | |
| Peramus | P. tenuirostris, P. dubius, P. minor | Mammal Bed | | | Peramuridae | |
| Peraspalax | P. talpoides | Mammal Bed, Sunnydown Farm Quarry | | | Dryolestidae | |
| Phascolestes | P. mustelula | Mammal Bed, Sunnydown Farm Quarry | | | Dryolestidae | |
| Plagiaulax | P. becklesii | Mammal Bed | | | Plagiaulacidae | |
| Purbeckodon | P. batei | Sunnydown Farm Quarry | | | Morganucodonta | |
| Spalacotherium | S. tricuspidens, S. evansae, S. hookeri | Mammal Bed, Sunnydown Farm Quarry | | | Spalacotheriidae | |
| Sunnyodon | S. notleyi | Sunnydown Farm Quarry | | | Paulchoffatiidae | |
| Thereuodon | T. taraktes | Sunnydown Farm Quarry | | | | |
| Tinodon | T. micron | Sunnydown Farm Quarry | | | Tinodontidae | |
| Triconodon | T. mordax | Mammal Bed, Sunnydown Farm Quarry | | | | |
| Trioracodon | T. bisulcus, T. major, T. oweni | Mammal Bed, Feather Quarry | | | | |
See also
References
- ^ "Lulworth Formation". BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 28 August 2018.
- ^ "Mupe Member". BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 28 August 2018.
- ^ "Ridgeway Member". BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 28 August 2018.
- ^ "Warbarrow Tout Member". BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 28 August 2018.
- ^ "Sunnydown Farm Quarry (clay: upper horizon; equivalent to DB 102/103 )". Paleobiology Database. Retrieved 28 August 2018.
- ^ "Mammal Bed, Durlston Bay (DB83)". Paleobiology Database. Retrieved 28 August 2018.
- ^ Evans, Susan E.; McGowan, Gerard J. (2002). "Lissamphibian remains from the Purbeck Limestone Group, southern England". Special Papers in Palaeontology: 104–119.
- ^ Milner, Andrew R. (November 2004). "The turtles of the Purbeck Limestone Group of Dorset, southern England" (PDF). Palaeontology. 47 (6): 1441–1467. Bibcode:2004Palgy..47.1441M. doi:10.1111/j.0031-0239.2004.00418.x. ISSN 0031-0239.
- ^ Pérez-García, A. (May 2014). "Revision of the poorly known Dorsetochelys typocardium, a relatively abundant pleurosternid turtle (Paracryptodira) in the Early Cretaceous of Europe". Cretaceous Research. 49: 152–162. Bibcode:2014CrRes..49..152P. doi:10.1016/j.cretres.2014.02.015. ISSN 0195-6671.
- ^ a b "Type specimen: BMNH 48209, 48210, a mandible. Its type locality is cliff face, Durlston Bay, which is in a Berriasian fluvial-lacustrine limestone in the Lulworth Formation of the United Kingdom". fossilworks.org.
- ^ "Type specimen: BMNH R2998. Its type locality is Durlston Bay, Swanage (DB105-107), which is in a Berriasian marine limestone in the Lulworth Formation of the United Kingdom".
- ^ "Type specimen: DORCM G913, a mandible. Its type locality is Feather Quarry, Durlston Bay (DB102), which is in a Berriasian marine shale in the Lulworth Formation of the United Kingdom".
