McCoy Brook Formation facts for kids

Quick facts for kids McCoy Brook Formation Stratigraphic range: Hettangian-Sinemurian
Breccia in the McCoy Brook Formation (Jurassic), Wasson's Bluff, Nova Scotia.
Type	Geological formation
Unit of	Newark Supergroup  Meriden Group
Sub-units	Scots Bay Member
Underlies	Erosional top
Overlies	North Mountain Basalt
Thickness	more than 230 m (750 ft)
Location
Coordinates	45°24′N 64°12′W / 45.4°N 64.2°W / 45.4; -64.2
Approximate paleocoordinates	27°24′N 13°18′W / 27.4°N 13.3°W / 27.4; -13.3
Region	Nova Scotia
Country	Canada
Extent	Bay of Fundy
Type section
Named for	McCoy Brook, Nova Scotia

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.

Fossil content

Sharks

Sharks
Name	Species	Location	Stratigraphic position	Notes
cf. Hybodus	None designated			A hybodont shark, found in lacustrine limestone and lacustrine basalt aggregate	Two Hybodus

Ray-finned fish

Ray-finned fish
Name	Species	Location	Stratigraphic position	Material	Notes	Images
?Redfieldiid	None designated			Scales and skull bones	Found in lacustrine limestone and lacustrine basalt aggregate
aff. Semionotus sp.	None designated				Found in lacustrine limestone, lacustrine basalt aggregate, and lacustrine mudstone	Semionotus

Synapsids

Synapsids
Name	Species	Location	Stratigraphic position	Material	Notes
Pachygenelus	cf. P. monus				A tritheledontid cynodont, found in fluvio-lacustrine sandstone and mudstone, and basalt agglomerate	Pachygenelus
Oligokyphus	sp.			Fragment of a right Dentary.	A tritheledontid cynodont, found in the layers of the Scots Bay member.	Oligokyphus
Tritylodontidae	unnamed			Right humerus	A tritylodontid cynodont, found in the layers of the Scots Bay member.
Cynodontia	unnamed			Partial right unla	A cynodont, found in the layers of the Scots Bay member.
Cynodontia	unnamed			Proximal portion of a right ischium.	A cynodont, found in the layers of the Scots Bay member.

Sphenodonts

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			A maxilla	Found in fluvio-lacustrine sandstone and mudstone, and basalt agglomerate

Dinosaurs

Ornithischia

Sauropodomorpha

Ichnotaxa

Ichnotaxa
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Anomoepus	A. scambus			Footprints	Found in fluvio-lacustrine sandstone and mudstone
Batrachopus sp.	None designated			Footprints	Found in fluvio-lacustrine sandstone and mudstone
Grallator sp.	None designated			Footprints	Found in fluvio-lacustrine sandstone and mudstone	Grallator
Otozoum	O. moodi			Footprints	Found in fluvio-lacustrine sandstone and mudstone	Otozoum

See also

In Spanish: Formación McCoy Brook para niños