Rabbitkettle Formation

The Rabbitkettle Formation is a geologic formation in the Yukon, comprising thin bedded silty and occasionally siliciclastic limestones deposited in deep (below storm wave base) waters. It preserves fossils dating back to the Ordovician period.

According to it:
 * Starts in the Late Cambrian; ends in late Tremadoc
 * reaches 750m in thickness
 * transitional slope facies
 * Alternation of black calcareous mudstones and grey, burrowed wackestones