Sedimentology and depositional environment of the Middle Ordovician Black Cove and American Tickle Formations - western Newfoundland
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The Middle Ordovician (Darriwilian) Black Cove (Nicholsonograptus fasciculatus biozone) and overlying American Tickle Formations (Pterograptus elegans biozone) represent the lower portion of the Goose Tickle Group located in western Newfoundland. The succession consists of a total of seven lithofacies, four siliciclastic and three carbonate that are grouped into three distinct facies associations. Facies association 1 (FA1) contains intercalations of clay-rich mudstones (Facies A) with silt-bearing, clay-rich mudstones (Facies B) and in places, foresets of alternating siltstone and clay-rich ...