Conodonts of the Hull Formation, Ottawa Group (Middle Ordovician), of the Ottawa-Hull area, Ontario and Quebec

Abstract

A conodont fauna consisting of ten species and seven form - species is described from the Hull Formation of the Ottawa Group of the Ottawa-Hull area in Ontario and Quebec. The collection of over 10,000 specimens indicates that the Hull conodont fauna is typical of the North American Midcontinent Province, and of the eastern subprovince (Barnes et al. , 1973) , and may be assigned to Fauna 8 of Sweet et al. (1971 ) . In New York and Ontario, Fauna 8 ranges from the uppermost part of the Chaumont Formation to the mid- part of the Kings Fall s Limestone (Schopf , 1966; Sweet et al , 1971) . In terms of North American s t ages, Fauna 8 is of late Porterfieldian through mid-Kirkfieldian age, or approximately late Wlildernessian (Bergstrtlm, 197lb). The Hull Formation is redefined in litho stratigraphic terms.

Evolution of faulting and paleo-stress field within the Ottawa graben, Canada

“…In the Ottawa area, the Paleozoic sedimentary rocks consist mainly of a sequence of Middle to Upper Ordovician carbonate and siliclastic units belonging to formations of the Ottawa Group (Uyeno, 1974;Sanford, 1993;Salad Hersi and Dix, 1999;Sharma et al, 2003). These formations include the Pamelia, Lowville, Chaumont, Bobcaygeon, Verulam and Lindsay (Williams and Rae, 1983;Williams et al, 1984;Salad Hersi and Dix, 1999;Sharma et al, 2003).…”

The Role of Regional and Local Structure in a Late Ordovician (Edenian) Foreland Platform-to-Basin Succession Inboard of the Taconic Orogen, Central Canada

“…The Upper Ordovician platform succession is of Turinian to Edenian age and is represented by the Ottawa Group [27] (Figure 3), a mostly limestone succession overlain by a structural remnant of a once more expansive (Maysvillian-lower Richmondian) siliciclastic foreland-basin succession ( Figure 2). Initial dysoxic foreland basin deposits are represented by pyritic black shale (Billings Formation) equivalent to the Utica or Indian Head facies in Quebec and New York State, respectively ( Figure 3).…”

Blackriveran (lower Mohawkian, Upper Ordovician) lithostratigraphy, rhythmicity, and paleogeography: Ottawa Embayment, eastern Ontario, Canada

“…2), each having a member-equivalent status, while recognizing that the "paleontological limits of these members are quite indefinite" (Wilson 1946, p. 24). Modifi-cation of Wilson's Ottawa Formation stratigraphy (e.g., Barnes 1964Barnes , 1967Kay 1942;Uyeno 1974) followed in the hope of reconciling the confusion of bio-, litho-, and chronostratigraphic terminologies, yet retaining the gross biostratigraphic division introduced by Raymond (1914) and Wilson (1946). Uyeno (1974) raised the Ottawa Formation and constituent members to group and formation status, respectively.…”

“…Modifi-cation of Wilson's Ottawa Formation stratigraphy (e.g., Barnes 1964Barnes , 1967Kay 1942;Uyeno 1974) followed in the hope of reconciling the confusion of bio-, litho-, and chronostratigraphic terminologies, yet retaining the gross biostratigraphic division introduced by Raymond (1914) and Wilson (1946). Uyeno (1974) raised the Ottawa Formation and constituent members to group and formation status, respectively. Wilson's (1946) nomenclature, as modified by Barnes (1964Barnes ( , 1967 and Uyeno (1974), has been in common use since then.…”

“…Uyeno (1974) raised the Ottawa Formation and constituent members to group and formation status, respectively. Wilson's (1946) nomenclature, as modified by Barnes (1964Barnes ( , 1967 and Uyeno (1974), has been in common use since then. Liberty (1969) concluded that the stratigraphic terms Pamelia, Lowville, and Chaumont for Blackriveran strata in New York were unacceptable for the Lake Simcoe region of south-central Ontario because (1) equivalent rocks..... all contain "Lowville lithologies"; and (2) "lithological correlation of [Lake Simcoe's] Gull River [Formation] with Pamelia, Lowville and Chaumont units is not considered possible" (p. 22).…”