Triple S Geotur 2010
The following account of a recent MVFN field trip was written by Cathy Keddy (MVFN Programme Chair) with photos by Cathy Keddy except as indicated. Read full story with 5 photos as pdf
This was not just another bicycle rodeo, but a fantastic geological outing in Lanark County led by Dr. Allan Donaldson. The tour really began just downstream from the road bridge at Pakenham where we were carried back to Paleozoic times (about 500 million years ago), when the area was beneath a warm, shallow sea.
Cross-sections of sea lily stems, appearing as half-centimeter-diameter washers, were scattered across the exposed, flat riverside rock pavement. Among them were the fossil remains of long, straight, conical shells of nautiloid cephalopods (like squids with shells on their bodies)—orthocones. The one in this photo, however, was just a baby. Some grew to lengths of meters! >>>>>>>>> Read full story as pdf with link above.