Charlotte J. Mehrtens, 1988. "Comparison of Foreland Basin Sequences: The Trenton Group in Southern Quebec and Central New York", The Trenton Group (Upper Ordovician Series) of Eastern North America: Deposition, Diagenesis, and Petroleum, Brain D. Keith
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Numerous high-angle faults that were active during deposition are recognizable within the autochthonous, Upper Ordovician, Trenton Group ramp sequence in southern Quebec/The facies of the Trenton Group in southern Quebec can be compared to those in New York and can be shown to be controlled by proximity to, or position within, the Taconic foreland basin.
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The Trenton Group (Upper Ordovician Series) of Eastern North America: Deposition, Diagenesis, and Petroleum
Regional facies for the Upper Ordovician Series (global classification) of eastern North America consist of clean (pure) carbonates, mixed carbonates and terrigenous clastics, shale, terrigenous clastics coarser than shale, and terrigenous clastics prograding over carbonates. The last facies is characteristic of the Upper Ordovician. Maps and cross sections for stages of the Upper Ordovician demonstrate the influence of regional tectonic events on the sedimentation pattern of these facies.