Tag Archives: upper cretaceous

Sep. 27 Field Trip

When: Sunday, Sept 27, 2020

Where: Chemainus River

Directions: Meet at Helmcken Park & Ride at 9am. Carpooling optional/personal decision; masks must be worn if/while carpooling, social distancing mandatory throughout the field trip.

Exposure: Cliffs along the deep canyon of the Chemainus River expose the black mudstones of the Haslam Formation, an ancient marine environment deposited in the Upper Cretaceous (85MY before present). Fossils can be found high above on the cliff face and loose in the steep piles of scree stretching to river level. Fossil are common in large and small concretions and in situ on this stretch of the river.

Many of the fossils of the Haslam Formation are representatives of extinct animal groups which have no modern counterparts. The ancient Haslam environment was a shallow sea populated by molluscs, fishes, and giant marine reptiles. Some of the fossils, such as clams and snails, are similar to their modern relatives, but others, such as the extinct ammonites, provide an excellent opportunity to explore changing life and environment over geological time.

Contact: RSVP Jerri Wilkins via the VicPS Facebook page or via email.