formation

Hillside where WZSSM VF000011 was collected from the Lujiatun Member of the Yixian Formation in 2012.

Ornithopod trackway at the Villar del Arzobispo Formation

Horseshoe Canyon Formation exposed in Horseshoe Canyon near Drumheller, Alberta

Exposure of the Two Medicine Formation near "Egg Mountain" in northern Montana.

Cloverly Formation near Shell

Elliot Formation Caves in 'Matalane Valley, Leribe, Lesotho

Lance Formation along Cow Creek, Niobrara County, Wyoming

Dinosaur Park Formation in Dinosaur Provincial Park, Alberta

The distictive banding of the Morrison Formation, a group of rock layers that occur throughout Dinosaur National Monument. The formation originated as muds and sands laid down by ancient rivers, and some of its outcrops have been found to contain 150-million-year-old dinosaur fossils like those found at the monument's Dinosaur Quarry.

Bituminous claystone, Lower Jurassic, Hesselberg, Middle Franconia. Sedimentary rock of very thin laminated layers (particles less than 0,0002 mm). Rock formation is known for its rich fossil findings, ex. Ichthyosaur.

Stratigraphy, Tremp Formation in Spain.

Stratigraphy, Tremp Formation in Spain.

Hell Creek Formation near Ft. Peck Reservoir, Montana

Pterodactylus compressirostris, holotype NHMUK PV 39410 (Cenomanian / Turonian, Chalk Formation). A–D proposed lectotype, fragment of the mandibular symphysis A left lateral view B respective line drawing C dorsal view D respective line drawing. E–H referred specimen, portion of the rostrum E left lateral view F respective line drawing G ventral view H respective line drawing. Abbreviations: ch – choanae, d – dentary, m – maxillae, naof – nasoantorbital fenestra, pl – palatine, pm – premaxillae, prid – palatal ridge, sul– sulcus. Arrows indicate alveoli or teeth. Scale bar = 10 mm. Photos courtesy of The Natural History Museum.

Partial skull of Manidens condorensis from the Middle Jurassic Cañadón Asfalto Formation of Argentina. Skull reconstructions in lateral view. Dashed lines indicate estimated edges. Abbreviations: a angular antfo antorbital fossa asaf anterior surangular foramen be buccal emargination bo basioccipital bt basal tubera d dentary d1, 2, 11 dentary tooth 1, 2, 11 emfo external mandibular fossa f frontal gl glenoid gr groove j jugal jfl jugal flange jh jugal horn m maxilla m1, 11 maxillary tooth 1, 11 n nasal pd predentary pm premaxilla po postorbital pof postorbital fossa popr paroccipital process q quadrate qj quadratojugal ri ridge sa surangular sq squamosal.

Cimoliopterus cuvieri. Holotype NHMUK PV 39409 (Cenomanian / Turonian, Chalk Formation), anterior part of the rostrum A right lateral view B respective line drawing C ventral view D respective line drawing. Abbreviations: m – maxillae, pm – premaxillae, pmcr – premaxillary crest, prid – palatal ridge. Arrows and numbers indicate alveoli or teeth and their respective position. Scale bar = 10 mm. Photos courtesy of The Natural History Museum.