Moreno Formation

The Moreno Formation is a Mesozoic geologic formation located in San Joaquin Valley (California).
Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.^[1]

Moreno Formation
Stratigraphic range: Maastrichtian 70–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Unit of	Chico Group
Underlies	Unconformity with the Martinez Formation and Tejon Formation
Overlies	Panoche Formation
Thickness	1,600–2,000 ft (487.68–609.60 m)
Lithology
Primary	Shale
Other	Sandstone
Location
Region	San Joaquin Valley  California
Country	United States

Paleofauna

Color key Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon		Notes Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Cartilaginous fish

Cartilaginous fishes reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Heptranchias[2]	H. sp

Ray-finned fish

Ray-finned fishes reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Bonnerichthys[3]	B. gladius				A large, filter-feeding pachycormid.	Bonnerichthys
Saurodon[4]	S. sp.				An ichthyodectid.	Saurodon

Dinosaurs

Dinosaurs reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Augustynolophus[5]	A. morrisi[5]				saurolophine.[5]	Augustynolophus
Saurolophus[5]	S. morrisi[5]				Reclassified as Augustynolophus morrisi.[5]

Mosasaurs

Mosasaurs reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Kolposaurus[6]	K. bennisoni[6]				The name Kolposaurus was preoccupied and its two constituent species moved to the new genus Plotosaurus.[6]
	K. tuckeri[6]
Plesiotylosaurus[7]	P. crassidens[7]					Plesiotylosaurus crassidens
Plotosaurus[6]	P. bennisoni[6]					Plotosaurus bennisoni
	P. tuckeri[6]				A junior synonym of P. bennisoni.
Prognathodon[8]	P. cf. waiparaensis
cf. Mosasaurus[8]	cf. M. sp.
Halisaurus[8]	H. sp.

Plesiosaurs

Plesiosaurs reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Aphrosaurus[9]	A. furlongi[9]					Aphrosaurus
Fresnosaurus[10]	F. drescheri[10]					Fresnosaurus
Hydrotherosaurus[9]	H. alexandrae[9]					Hydrotherosaurus
Morenosaurus[10]	M. stocki[10]					Morenosaurus

Turtles

Testudines reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Adocus					J. Howard Hutchison later referred the specimen originally identified as Adocus by to the genus Basilemys.[11]
Basilemys
Osteopygis[10]

Foraminifera

Forams reported from the Moreno Formation
Genus	Species	Location	Member	Material	Notes	Images
Anomalina[2]	A. pseudopopillosa		Tierra Loma Shale Member
Bulimina	B. obtusa		Tierra Loma Shale Member		99% of the foraminifera sampled at the Tierra Loma Shale Member belonged to B. obtusa.[12] [13]
Dentalina[2]	D. legumen		Tierra Loma Shale Member
Frondicularia[2]	F. undulosa		Tierra Loma Shale Member
Gyroidina[14]	G. depressa		Tierra Loma Shale Member
Nodosaria[2]	N. monile		Tierra Loma Shale Member
	N. pomuligera
	N. spinifera
	N. sp
Nodosarella[13]	N. sp		Tierra Loma Shale Member

See also

• Earth sciences portal
• Paleontology portal
• Dinosaurs portal

• List of dinosaur-bearing rock formations
  • List of stratigraphic units with few dinosaur genera