DENMAN ISLAND CONCRETION
Northumberland Fm, Upper Cretaceous Nanaimo Group
A concretion found eroding out of the grey shales at Denman Island.
Thee Upper Cretaceous Nanaimo Group of southwest British Columbia is a >4 km-thick succession consisting mostly of deep marine siliciclastics deposited directly on the Insular Superterrane. As such, this succession has been the focus of several paleomagnetic, isotope