Unit Name: Jameson Bay Formation
Unit Type: Lithostratigraphic
Rank: Formation
Status: Formal
Usage: Currently in use
Age Interval: Early Jurassic - Middle Jurassic (199.6 - 161.2 ma)
Age Justification: Ammonites collected from the Jameson Bay Formation have been dated to Pliensbachian, Toarcian and Aalenian (Frebold, 1960, 1975; Tozer, 1963b; Tozer and Thorsteinsson, 1964; Balkwill, 1983).
Province/Territory: Arctic Offshore; Northwest Territories; Nunavut; Yukon Territory

Originator: Embry, 1984b

Type Locality:
Type locality in the Elf Jameson Bay C-31 well, where the formation is 254 m thick.

Distribution:
Occurs over much of the Sverdrup Basin, generally thickening basinward.

Locality Data:
WELL 300C317650116300; JAMESON BAY C-31. Interval(m): From 601, To 855.

Lithology:
"Consists mainly of medium to dark green-grey shale with siltstone laminae and interbeds. Very fine grained, glauconitic sandstone units up to one meter thick are also present in many sections but comprise only a small percentage of the formation. Shale units are parallel laminated to burrowed and siltstones and sandstones are usually extensively burrowed. Calcareous, dolomitic and sideritic concretions are very common throughout the Jameson Bay Formation." (Embry, 1984b)

Relationship:
In the western Sverdrup, the Jameson Bay conformably to unconformably (at basin margins) overlies sandstone of the King Christian Formation. In the central and eastern Sverdrup, the Jameson Bay conformably overlies the Heiberg Formation. Over much of the basin, the Jameson Bay is conformably overlain by the Sandy Point Formation. In the basin center the Sandy Point is absent due to facies change and the Jameson Bay is conformably overlain by the McConnell Island Formation.

History:
The Jameson Bay Formation, as established by Embry (1984b), is synonymous with the following units from previous publications: - Lower portion of the Wilkie Point Formation, western Sverdrup Basin (Tozer, 1956; Tozer and Thorsteinsson, 1964) - Lower Savik, Savik Formation, western Ellesmere and southern Axel Heiberg (Tozer, 1963b) - Units 1-3, Section S1 and units 1-4, Section S2, Savik Formation, Expedition Fiord, western Axel Heiberg (Fricker, 1963) - Units 1-4, Savik Formation, northwestern Ellef Ringnes (Stott, 1969) - Member JjC, Jaeger Formation, Cornwall Island (Balkwill, 1983) - Lower Savik, Savik Formation, Amund Ringnes and King Christian islands (Balkwill, 1983; Balkwill and Roy, 1977) - Lower Wilkie Point and Savik, Sabine Peninsula (Henao-Londono, 1977) Named after Jameson Bay, on the east coast of Prince Patrick Island.

References:
Balkwill, H.R. and Roy, K.J., 1977. Geology of King Christian Island, District of Franklin; Geological Survey of Canada, Memoir 386, 28 p. + "A" Series Map 1445A, Geology of King Christian Island, District of Franklin, Scale: 1:125 000.
Balkwill, H.R., 1983. Geology of Amund Ringnes, Cornwall and Haig-Thomas Islands, District of Franklin; Geological Survey of Canada, Memoir 390, 76 p.
Embry, A., 1984b. The Wilkie Point Group (Lower-Upper Jurassic), Sverdrup Basin, Arctic Islands; Geological Survey of Canada, Paper 84-1B, pp. 299-308.
Frebold, H., 1960. The Jurassic faunas of the Canadian Arctic. Lower Jurassic and lowermost Middle Jurassic ammonites: Geological Survey of Canada, Bulletin 59, 33 p.
Frebold, H., 1975. The Jurassic faunas of the Canadian Arctic, Lower Jurassic ammonites, biostratigraphy and correlations; Geological Survey of Canada, Bulletin 243.
Fricker, P.E., 1963. Geology of the expedition area, western central Axel Heiberg Island Canadian Arctic Archipelago; in, Jacobsen-McGill Arctic Research Expedition, 1959-1962; McGill University, Montreal, Quebec, Axel Heiberg Research Reports, Geology No. 1, 156 p.
Henao-Londono, Diego, 1977. Correlation of producing formations in the Sverdrup Basin; Canadian Society of Petroleum Geologists (CSPG), Bulletin of Canadian Petroleum Geology, vol. 25, no. 5 (September), pp. 969-980.
Stott, D.F., 1969. Ellef Ringnes Island, Canadian Arctic Archipelago; Geological Survey of Canada, Paper 68-16, 44 p.
Tozer, E.T. and Thorsteinsson, R., 1964. Western Queen Elizabeth Islands, Arctic Archipelago: Geological Survey of Canada, Memoir 332, 242 p.
Tozer, E.T., 1956a. Geological reconnaissance, Prince Patrick, Eglinton and western Melville islands, Arctic Archipelago, Northwest Territories; Geological Survey of Canada, Paper 55-5, 32 p.
Tozer, E.T., 1963b. Northwestern Bjorn Peninsula, pp. 363-370: in Fortier, Y.O. et al. Geology of the north-central part of the Arctic Archipelago (Operation Franklin), Geological Survey of Canada, Memoir 320, 671 p.

Source: GEOLOGICAL SURVEY OF CANADA, CALGARY
Contributor: G.E. McCune
Entry Reviewed: No
Name Set: Lithostratigraphic Lexicon
LastChange: 24 Jan 2008