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Ontario OnyxFrom the deepest formation of the Black River comes a wonderfully dramatic landscape and architectural material called Ontario Onyx. The size ranges from massive outcropping, wallstone, flagstone, handstack, natural and guillotine steps, to ashlar, veneer building stones.

Applications for retaining walls, seawalls, waterfeatures as well as steps & footpaths.


Geologist Notes:
An attractive medium to dark gray argillacious uniformly-bedded, fine-grained limestone of high compressive strength with a weathered subtle yellow edge. Quarried from terrain between the Saint Lawrence lowlands and the Adirondak Mountains from the Pamelia Formation of Middle Ordovician age.