Inwood Formation, Manitoba

For Inwood Formation, New York, see Tuckahoe marble.

The Inwood Formation is a geologic formation in Manitoba. The silty and salty dolomites preserve fossils dating back to the Telychian stage of the Silurian period.^[1]

Inwood Formation
Stratigraphic range: Telychian ~436–433 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Formation
Unit of	Interlake Group
Lithology
Primary	Dolomite
Other	Halite, siltstone
Location
Coordinates	53.2°N 99.3°W / 53.2; -99.3
Approximate paleocoordinates	10.0°S 51.4°W / -10.0; -51.4
Region	Manitoba
Country	Canada
Inwood Formation, Manitoba (Canada) Show map of Canada Inwood Formation, Manitoba (Manitoba) Show map of Manitoba

Fossil content

The following fossils have been reported from the formation:^[1]

Trilobites

• ?Encrinurus tuberculifrons^[2]

Ostracods

• Leperditia hisingeri^[2]

Strophomenata

• Brachyprion cf. inflata^[2]
• Fardenia ellipsoides^[2]
• F. transversalis^[2]
• Fardenia cf. elegans^[2]

Rhynchonellata

• Camarotoechia indianensis^[2]
• Hyattidina junea^[2]

Gastropods

• Coelocaulus sp.
• Gastropoda indet.^[2]

Cephalopods

• Lowoceras imbricatum^[2]
• Mandaloceras parvulum^[2]

Stromatoporoidea

• Clathrodictyon drummondense^[2]
• Clathrodictyon cf. striatellum^[2]

Corals

• Amplexoides severnensis^[2]
• Asthenophyllum inwoodense^[2]
• Favosites cf. niagarensis^[2]
• Halysites catenularia^[2]
• Neozaphrentis tyrrelli^[2]
• Paleofavosites poulseni^[2]
• P. transiens^[2]

See also

• List of fossiliferous stratigraphic units in Manitoba