PBDB Collection

Hidden Valley Quarry (HVQ): Middle Campanian - Late Campanian, Montana

List of taxa

Where & when

Geology

Taphonomy & methods

Metadata & references

Taxonomic list

Chondrichthyes - Hybodontiformes - Hybodontidae

	Hybodus sp. Agassiz 1834	Fiorillo 1997
Chondrichthyes - Lamniformes - Carchariidae

	Carcharias sp. Rafinesque 1810	Fiorillo 1997
Chondrichthyes - Lamniformes - Otodontidae

	Cretolamna sp. Glikman 1958	Fiorillo 1997
Chondrichthyes - Rajiformes - Rhinobatidae

	Myledaphus sp. Cope 1876	Fiorillo 1997
Acipenseriformes - Acipenseridae

	Acipenser sp. Linnaeus 1758
Reptilia - Pterosauria - Azhdarchidae

	Azhdarchidae indet. Nessov 1984
Reptilia - Theropoda

	Theropoda informal indet. A	Fiorillo 1997
	"A"
Reptilia - Dromaeosauridae

	Richardoestesia sp. Currie et al. 1990	Fiorillo 1997
	= Richardoestesia gilmorei Currie et al. 1990	Fiorillo 2005

	Dromaeosaurus sp. Matthew and Brown 1922	Fiorillo 1997
	= Dromaeosaurus albertensis Matthew and Brown 1922	Fiorillo 2005

	Saurornitholestes sp. Sues 1978	Fiorillo 1997
	= Saurornitholestes langstoni Sues 1978	Fiorillo 2005
Reptilia - Troodontidae

	Troodon sp. Leidy 1856	Fiorillo 1997
	= Troodon formosus Leidy 1856	Fiorillo 2005
Reptilia - Ornithomimidae

	Ornithomimidae indet. Marsh 1890
Reptilia - Hadrosauridae

	Hadrosaurinae indet. Lambe 1918
Reptilia - Baenidae

	Boremys sp. Lambe 1906	Fiorillo 1997
Reptilia - Testudines - Nanhsiungchelyidae

	Ceratopsia indet. Marsh 1890	Fiorillo 1989
	tracks
	= Basilemys sp. Hay 1902	Fiorillo 2005
Reptilia - Testudines - Adocidae

	Adocus sp. Cope 1868	Fiorillo 1997
Reptilia - Testudines - Trionychidae

	Aspideretes sp. Hay 1904	Fiorillo 1997
	= Trionychinae indet. Gray 1825	Alroy 2007
Mammalia

	Alphadon sp. Simpson 1927	Fiorillo 1997
	= Metatheria indet. Huxley 1880	Alroy 2002
Mammalia - Stagodontidae

	Eodelphis sp. Matthew 1916	Fiorillo 1997
Actinopteri - Elopiformes - Phyllodontidae

	Paralbula sp. Blake 1940
see common names

Country:	United States	State/province:	Montana	County:	Golden Valley
Coordinates:	46.5° North, 109.3° West (view map)
Paleocoordinates:	56.4° North, 66.5° West (Wright 2013)
Basis of coordinate:	estimated from map
Geographic resolution:	small collection

Period:	Cretaceous	Epoch:	Late Cretaceous
Stage:	Campanian	10 m.y. bin:	Cretaceous 7
*Epoch:	Senonian
Key time interval:	Middle Campanian - Late Campanian
Age range of interval:	83.6 - 72.1 m.y. ago
* legacy (obsolete) database fields

Geological group:	Montana	Formation:	Judith River
Local section:	JRWGV	Local bed:	2
Local order:	bottom to top
Stratigraphic resolution:	group of beds
Stratigraphy comments: Judithian based on fauna

Primary lithology:	fine,medium,gray sandstone
Secondary lithology:	planar lamination,burrows,bioturbation siltstone
Includes fossils?	Y
Includes fossils?	Y
Lithology description: "tracks are preserved in a finely laminated dark gray siltstone...[that] occurs within a sequence of alternating light to medium gray, fine- to medium-grained sandstones and dark gray silststones."
Environment:	levee

Modes of preservation:	body,mold/impression,trace
Size of fossils:	macrofossils,mesofossils
Disassociated major elements:	some
Disassociated minor elements:	some

Collection methods:	field collection,observed (not collected)
Reason for describing collection:	general faunal/floral analysis

Database number:	14462
Authorizer:	J. Alroy, M. Carrano	Enterer:	J. Alroy, M. Carrano
Modifier:	M. Carrano	Research group:	taphonomy,vertebrate
Created:	1998-09-21 00:00:00	Last modified:	2025-02-22 15:12:02
Access level:	the public	Released:	1998-09-21 00:00:00
Creative Commons license:	CC0

6294		J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
19636		J. Alroy. 2007. Synonymies and reidentifications of North American fossil vertebrates and so forth. [J. Alroy/J. Alroy]
14262	ETE	A. R. Fiorillo. 1989. First occurrence of supposed ceratopsian footprints from the Judith River Formation (Upper Cretaceous) of south-central Montana. Journal of Vertebrate Paleontology 9(3, suppl.):20A [M. Carrano/M. Carrano/M. Carrano]
1488		A. R. Fiorillo. 1997. Stratigraphic distribution of fossil vertebrates in the Judith River Formation (Upper Cretaceous) of Wheatland and Golden Valley counties, south-central Montana. Northwest Geology 27:1-12 [J. Alroy/J. Alroy/M. Carrano]
13591	ETE	A. R. Fiorillo. 2005. Turtle tracks in the Judith River Formation (Upper Cretaceous) of south-central Montana. Palaeontologia Electronica 9(1):1-11 [M. Carrano/M. Carrano/M. Carrano]
13752	ETE	A. R. Fiorillo and P. J. Currie. 1994. Theropod teeth from the Judith River Formation (Upper Cretaceous) of south-central Montana. Journal of Vertebrate Paleontology 14(1):74-80 [M. Carrano/M. Carrano/M. Carrano]