Highway 401

Explore details about location Highway 401. Highway 401 is a location situated within the Kingston alongside other areas such as Wellington Street, Brock Street, Johnson Street.

Mid-Ordovican 470 million year old limestone shows different periods of sedimentation. The thin dark layer between the dark and light limestone is volcanic ash. The lighest colour stone is the purest carbonate rock. Silt content darkens it. Looking south. Other than some 12,800 year old glacial sediments, the top 470 million years of geological history is missing. There is a dramatic change to the sediments, for a million years immediately following the volcanic ash. What happened? by Steve Manders