Chazy Group
Geology
Formations: unnamed (34), ?Aylmer (1), Aylmer (1), Crown Point (68), Crown Point? (1), Day Point (47), Day Point? (1), Laval (1), Valcour (65), Valcour? (1)
Lithologies: not reported (19), claystone (2), mudstone (1), "shale" (15), sandstone (5), lime mudstone (20), grainstone (23), "reef rocks" (11), framestone (2), "limestone" (156), dolomite (10)
Paleoenvironments: marine indet. (144), carbonate indet. (53), reef, buildup or bioherm (23)
Age range: Sandbian or 458.20000 to 452.80000 Ma
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