Depositional environments and revised stratigraphy along the Black River-Trenton boundary in New York and Ontario

Cameron, Barry; Mangion, S.

doi:10.2475/ajs.277.4.486

Cited by 17 publications

(30 citation statements)

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“…The use of corals and many other benthic organisms is far from ideal in most instances, since their distributions are often strongly ecologically controlled. Tetradium itself appears almost totally ecologically controlled, preferentially inhabiting, or inhabiting most successfully, low-to moderate-energy'lagoons and other sheltered environments as seen in the St. Lawrence Lowland (Clark 1972;Clark andGlobensky 1975, 1976;Harland and Pickerill 1982), Ontario, and New York State (Walker 1972;Cameron and Mangion 1 977).…”

Section: Comments and Conclusionmentioning

confidence: 98%

Ordovician intracratonic sediments from the Lac-St-Jean and Chicoutimi areas, Quebec, eastern Canada

Harland¹,

Pickerill²,

Fillion³

1985

Can. J. Earth Sci.

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The transgressive sequence of the Ordovician intracratonic basin of the present-day Lac-St-Jean and Chicoutimi areas is characterized by a variety of sediments that were deposited in a number of environments. Marginal and nearshore sediments of the basin were a complicated system of clastics derived from the adjacent rugged coastal hinterland and intertidal and shallow subtidal carbonates with variably admixed clastics. Farther from shore, in sheltered bays or lagoons partly enclosed by offshore shoals and bars of skeletal lime sands, fine-grained carbonates with coral-algal-bryozoan thickets accumulated. These sediments exhibit numerous submarine hardgrounds or firm grounds. Variations in sedimentation rate and the development of periodically exposed banks of sediment also resulted in the formation of subaerial microkarstic surfaces. The offshore skeletal shoals and bars, which were composed mainly of pelmatozoan debris but included patches of incipient reef growth, provided an incomplete barrier to circulation. Deeper water offshore subtidal sediments consisted of mixed carbonate and argillaceous muds.Sudden increased rates of transgression, probably related to isostatic movements, resulted in the drowning of these coastal environments and the deposition of dark-coloured argillaceous shales in deeper water. These shales are partly of latest Utica and mainly Lorraine in age and it is likely that the initial submergence of this part of the Canadian Shield was much later than that in the St. Lawrence Lowland, probably occurring in Cobourg time.

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Section: Comments and Conclusionmentioning

confidence: 98%

Ordovician intracratonic sediments from the Lac-St-Jean and Chicoutimi areas, Quebec, eastern Canada

Harland¹,

Pickerill²,

Fillion³

1985

Can. J. Earth Sci.

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“…The Lourdes carbonate ramp is equivalent to Late Ordovician epicontinental foreland platforms along eastern Laurentia represented by Black River and Trenton platform successions of eastern Ontario and southern Quebec (e.g., Lavoie 1995;Lavoie and Asselin 1998;Prave et al 2000;Salad Hersi and Dix 1999;Stait 1988), central and eastern New York (Cameron and Mangion 1977), and sequences Holland and Patzkowsky (1996), or supersequence 2 of Pope and Read (1998), of the central Appalachians.…”

Section: Late Ordovician Platform Successions Eastern North Americamentioning

confidence: 99%

Facies development of a Late Ordovician mixed carbonate-siliciclastic ramp proximal to the developing Taconic orogen: Lourdes Formation, Newfoundland, Canada

Hender

Dix

2007

Facies

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The Upper Ordovician (late Whiterockian to Mohawkian) Lourdes Formation represents a narrow (tens of kilometers), short-lived [*5-7 million years (my)], open-ocean (high-energy) mixed siliciclastic-carbonate ramp that onlapped allochthonous strata along the orogen side of the local Taconic foreland basin. Platform development followed a 6-8 my hiatus during which weathering had concentrated chemically mature siliciclastics that were admixed with initial carbonate sediments. A cross-platform facies gradient contains paleokarst and peritidal carbonates and sandstones, shallow-ramp carbonate bioherms and skeletal shoals, and deeper ramp calcareous shales. Transgressive systems tracts are marked by ramp-wide sheets and shoals of skeletal grainstone and low accumulation rates, and highstand systems tracts are marked by significant admixture and interbedding of siliciclastics with cross-ramp carbonate facies. Platform demise coincides with increased siliciclastic input, which is likely tectonically influenced. The Lourdes platform is equivalent to epicontinental foreland ramps along eastern Laurentia, but its narrower width precluded formation of oceanographically restricted platform-interior facies.

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“…Our stratigraphic terminology and boundary definitions, therefore, are based on work by Cushing et al (1910) and Kay (1929), later modified by Cameron and Mangion (1977) and McFarlane (1992), as well as our study. Three Blackriveran formations occur in eastern Ontario: Pamelia, Lowville, and Chaumont.…”

Section: Blackriveran Lithostratigraphymentioning

confidence: 99%

“…Beginning with Logan (1863) and Cushing et al (1910), many previous workers have recognized a gross stratigraphic similarity among strata in upstate New York and the Kingston and Ottawa regions of Ontario (Raymond 1914;Wilson 1932Wilson , 1936Kay 1942;Young 1943aYoung , 1943bCameron and Mangion 1977;McFarlane 1992). Historically, studies have introduced a mixture of litho-, bio-, and chronostratigraphic terminology (see Cameron and Mangion 1977). Whereas Cameron and Mangion (1977) and McFarlane (1992) provided some resolution of definition and correlation among formations between the New York and the Kingston regions (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…Historically, studies have introduced a mixture of litho-, bio-, and chronostratigraphic terminology (see Cameron and Mangion 1977). Whereas Cameron and Mangion (1977) and McFarlane (1992) provided some resolution of definition and correlation among formations between the New York and the Kingston regions (Fig. 2), the problem has remained for eastern Ontario geology.…”

Section: Introductionmentioning

confidence: 99%

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

Hersi¹,

Dix²

1999

Can. J. Earth Sci.

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The Ottawa Embayment contains erosional remnants of a shallow-water carbonate platform (St. Lawrence Platform) of Late Ordovician (Caradocian) age. Stratigraphy of three Blackriveran formations -in ascending order, Pamelia, Lowville, and Chaumont -documents regional changes in continuity and types of depositional facies. The Pamelia Formation contains two members, each containing basin-wide basal siliciclastic units overlain by interbedded limestone, dolostone, and shale. An alternate division recognizes six shallowing-upward units; regionally extensive, intertidal to supratidal, dolomitic sandstone and (or) sandy dolostone define their tops. Sedimentary structures and isotope (C, O) geochemistry support a syngenetic origin of this stratigraphic (bedded) dolomite. The Lowville Formation contains two facies associations: subtidal to lower intertidal bioclastic and oolitic packstone -grainstone followed by lagoonal to intertidal mudflat facies. Lateral facies continuity is reduced compared to the Pamelia Formation. The Chaumont Formation contains thick beds of burrowed, bioclastic, peloidal mudstone to packstone, and minor shale. No rhythmic pattern is recognized in these subtidal facies. Upsection decrease of rhythmic sedimentation, with a decrease in lateral facies continuity of the studied strata reflects a progressive increase in net accommodation space related to Taconic transgression. Higher order rhythmicity of dolostone and sandstones of the Pamelia Formation can be traced into adjacent regions (New York and Kingston, Ont.). Dolomitic units may identify basin-wide chronostratigraphic markers, potentially useful for future sequence analysis. Regional correlation reveals a good oceanographic linkage between the Ottawa Embayment and the Appalachian Basin during Pamelia time and a restricted access across a paleohigh in the Montréal region. By the time of Lowville deposition, Taconic transgression had breached this restriction.Résumé : Le rentrant d'Ottawa contient les vestiges d'érosion d'une plate-forme de carbonate déposés à faible profondeur (Plate-forme du Saint-Laurent) durant l'Ordovicien tardif (Caradocien). L'étude stratigraphique de trois formations blackrivériennes -en ordre ascendant, Pamélia, Lowville, et Chaumont -documente les changements régionaux dans la continuité et des types de faciès sédimentaires. La Formation de Pamélia comprend deux membres, chacun contenant des unités silicoclastiques basales étendues dans tout le bassin, et recouvertes par des interstrates de calcaire, dolomie et shale. D'autre part, une autre division propose six unités de comblement : régionalement étendue, intertidale à supratidale, grès dolomitique et (ou) dolomie sableuse définissant les polarités. Les structures sédimentaires et les données de géochimie isotopique (C, O) suggèrent que cette dolomie stratigraphique (litée) a une origine syngénétique. La Formation de Lowville renferme deux associations de faciès : packstone bioclastique et oolitiquegrainstone subtidal à intertidal inférieur, suivi par la slikke vas...

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Depositional environments and revised stratigraphy along the Black River-Trenton boundary in New York and Ontario

Cited by 17 publications

References 0 publications

Ordovician intracratonic sediments from the Lac-St-Jean and Chicoutimi areas, Quebec, eastern Canada

Ordovician intracratonic sediments from the Lac-St-Jean and Chicoutimi areas, Quebec, eastern Canada

Facies development of a Late Ordovician mixed carbonate-siliciclastic ramp proximal to the developing Taconic orogen: Lourdes Formation, Newfoundland, Canada

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

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