McCoy Brook Formation
Introduction The '''McCoy Brook Formation''' is a geological formation dating to roughly between 200 and 190 million years ago and covering the Hettangian to Sinemurian stages. The McCoy Brook Formation is found in outcrops around the Bay of Fundy, Nova Scotia.
Agen The McCoy Brook Formation rests on the North Mountain Basalt, one of the volcanic flows associated with the Triassic–Jurassic boundary in the Newark Supergroup. The base of the McCoy Brook Formation is probably within 100,000 to 200,000 years of the boundary.
Scots Bay Member This thin unit (9 m) of lacustrine sediments is preserved in six small synclinal outcrops around Scots Bay on the west side of the Blomidon Peninsula. Originally named as the ''Scots Bay Formation'', it is now correlated with the lowermost part of the McCoy Brook Formation, where it is referred to as the ''Scots Bay Member''. The Scots Bay Member accumulated in an aerobic lake on the floor of the subtropical Fundy Rift Valley, associated with Silica-rich Hydrothermal Springs derived from the CAMP vulcanism, where the biota is composed of algal Stromatolites, Oncolites, Charophyta, Ostracoda, Gastropoda, Conchostraca, fish bones, calcispheres and logs.
Fossil content === Sharks ==='''Sharks''' Name Species Location Stratigraphic position Material Notes cf. ''Hybodus'' IndeterminateWasson Bluff Scots Bay member Teeth & Coprolites A hybodont shark. Recovered from lacustrine facies Two ''Hybodus''=== Ray-finned fish ==='''Ray-finned fish''' Name Species Location Stratigraphic position Material Notes Images ?Redfieldiid None designatedWasson Bluff Scots Bay member Scales and skull bones Found in lacustrine limestone and lacustrine basalt aggregate aff. ''Semionotus'' sp. None designatedWasson Bluff Scots Bay memberDisarticulated remains  Found in lacustrine limestone, lacustrine basalt aggregate, and lacustrine mudstone''Semionotus''=== Synapsids ==='''Synapsids''' Name Species Location Stratigraphic position Material Notes Images Cynodontia IndeterminateWasson BluffScots Bay Member*Partial right unla*Proximal portion of a right ischium A  cynodont ''Oligokyphus'' ''Oligokyphus sp. ''Wasson BluffScots Bay MemberFragment of a right Dentary. A tritheledontid cynodont, found in the layers of the Scots Bay member. ''Oligokyphus'' ''Pachygenelus'' cf. ''P. monus''Wasson BluffUpper MemberExcellently preserved fragments of two premaxillae, ten maxillae, and six dentaries A tritheledontid cynodont''Pachygenelus'' Tritylodontidae IndeterminateWasson BluffScots Bay MemberRight humerus A tritylodontid cynodont, found in the layers of the Scots Bay member.=== Sphenodonts ==='''Sphenodonts''' Name Species Location Stratigraphic position Material Notes Images ''Clevosaurus'' ''C. bairdi''Wasson Bluff Lower McCoy Brook Formation Partial skulls and jaws, isolated cranial bones, partial postcranium, postcranial bones A sphenodontian of relatively small size, found in fluvio-lacustrine sandstone and mudstone, and basalt agglomerate''Clevosaurus'' cf. ''Palycymalia'' IndeterminateWasson Bluff Middle McCoy Brook Formation Isolated Remains A sphenodontian   cf. ''Sigmala'' IndeterminateWasson Bluff Middle McCoy Brook Formation Isolated Remains A sphenodontian  === Crocodyliforms ==='''Protosuchidae''' Genus Species Location Stratigraphic position Material Notes Images ''Protosuchus'' ''P. micmac'' Wasson Bluff Lower McCoy Brook Formation Partial lower jaw, several other skull bones Found in fluvio-lacustrine sandstone and mudstone, and basalt agglomerate ''Protosuchus'' Sphenosuchid Indeterminate*Blue sack west*Wasson Bluff Lower McCoy Brook Formation *A maxilla*Isolated Osteoderms Found in fluvio-lacustrine sandstone and mudstone, and basalt agglomerate=== Dinosaurs ======= Ornithischia ===='''Ornithischians''' Genus Species Location Stratigraphic position Material Notes Ornithischia IndeterminateWasson BluffScots Bay Member  *Impressions of teeth (YPM VP 008668, VP 008691)*Vertebral centra (YPM VP 008693) *Possible rib fragments (YPM VP008694, VP 008695) Suggested to be similar to ''Scutellosaurus'' and to ''Leshotosaurus''. Represent among the oldest reliable Ornithischian remains of North America.==== Theropoda ===='''Ornithischians''' Genus Species Location Stratigraphic position Material Notes Theropoda IndeterminateWasson BluffScots Bay Member  Teeth Theropod dinosaur teeth similar to ''Megapnosaurus''.==== Sauropodomorpha ===='''Sauropodomorph dinosaurs''' Genus Species Location Stratigraphic position Material Notes Images ''Fendusaurus'' ''F. eldoni''Wasson BluffMiddle McCoy Brook Formation *YPM VPPU 022196, several vertebrae and limb-bone fragments*FGM994GF69, postcranial skeleton*FGM998GF9, partial skeleton *FGM998GF13_I, large, articulated specimen*FGM998GF13/FGM998GF13_III postcranea and dissociated skull*NSM005GF009/FGM998GF46, partial, badly deformed and fragmentary skeleton with gastroliths  Although long assigned to ''Ammosaurus'', the material actually represents a new genus and species; represents the most abundant dinosaur in the formation, and has yield specimens with preserved stomach contents that suggest migration patterns. The possibility that represents more than one genus is open.=== Ichnotaxa ==='''Ichnotaxa''' Genus Species Location Stratigraphic position Material Notes Images  ''Anchisauripus''  *''A. sillimani''*''A. ispp. ''*Blue sack west *McKay Head*Wasson BluffMiddle McCoy Brook Formation   Footprints  Small Theropod Footprints  ''Anomoepus'' *''A. scambus''*''A. ispp.'' *Blue sack west*McKay Head*Old Wife Point tracksite  Middle McCoy Brook Formation Footprints  Ornithischian Footprints   ''Batrachopus''  *''B. deweyii''*''B. dispar''*''B. ispp. ''*McKay Head  *Old Wife Point tracksite *Wasson Bluff tracksite Middle McCoy Brook Formation  Footprints  Crocodrylomorph Footprints   ''Eubrontes'' *E. giganteus *''E. sillimani''*''E. minusculus''*''E ispp.'' *Five Islands Provincial Park *Old Wife Point tracksite *Wasson Bluff tracksite Middle McCoy Brook Formation  Footprints  Medium-sized Theropod Footprints   ''Grallator''  *''G. cursorius''*''G. tenuis''*''G. ispp.'' *McKay Head *Old Wife Point tracksite Middle McCoy Brook Formation   Footprints  Small Theropod Footprints ''Grallator''  ''Otozoum''  *''O. moodi''*''O. ispp.'' *Blue sack east *McKay Head*Minas Basin tracksite Middle McCoy Brook Formation  Footprints  Sauropodomorph Footprints ''Otozoum''
See also * List of dinosaur-bearing rock formations** List of stratigraphic units with few dinosaur genera
References