Pant 5 (St. Bride's Island) (Jurassic to of the United Kingdom)

Also known as Pant Quarry, St. Brides

Where: Wales, United Kingdom (51.5° N, 3.6° W: paleocoordinates 37.7° N, 1.8° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Hettangian to Hettangian (201.3 - 190.8 Ma)

• Fissure fills in Late Carboniferous (Dinantian) limestone. Deposits resulting from Liassic transgression over Carboniferous limestones. Kermack, Mussett, and Rigney (1981) note that a Lower Sinemurian age for the Welsh fissures is supported by evidence in David Pacey's unpublished thesis (1978).

• bed-level stratigraphic resolution

Environment/lithology: fissure fill; limestone and hematitic, gray, green, red, yellow marl

• Fissures in limestone filled with silt, acting as traps for small animals. Localities lie on a small limestone plateau that formed an island (Robinson, 1971) or archipelago in Jurassic times. Triassic to Jurassic subsidence and a transgression by Tethys Ocean gradually resulted in inundation by Early Jurassic (Sinemurian). Such fissure fills formed in open joints in the limestone and are from 0.3 to 1 m wide.
• The matrix filling of the fissures ranges from soft clay to hard marl and often is rich in hematite grains. Matrix color varies from red to yellow, green and gray, and the bone can be white to dark gray and brown. Typically bone is white and matrix is red. Plant fossils are often preserved as charcoal (fusain) in gray matrix (also in yellow and red).

Size classes: mesofossils, microfossils

Reposited in the BMNH

Collection methods: quarrying, chemical,

Primary reference: W. A. Clemens. 2007. Early Jurassic allotherians from South Wales (United Kingdom). Fossil Record 10(1):50-59 [R. Butler/R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 137123: authorized by Richard Butler, entered by Richard Butler on 10.12.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Rhynchocephalia -
Sphenodontia indet. rhynchocephalian
 Therapsida - Tritylodontidae
Oligokyphus sp. Hennig 1922 therapsid
 Holotheria -
Kuehneotherium "undescribed species" Kermack et al. 1968 mammal
 Allotheria -
Allotheria indet. mammal
NHMUK M45425, a poorly preserved, molariform tooth
Thomasia cf. moorei Owen 1871 mammal
NHMUK M45421 (= Specimen A), left upper molariform; M45422 (= Specimen B), left upper molariform; M45423 (= Specimen C), fragment of a molariform with two cusps, central basin, and one complete root; M45426 (= Specimen F), fragment of a molariform: M45424 (= Specimen D), upper incisiform.