Saanich Inlet Core Model (ODP 178)

Summary:

This core shows an abrupt 30cm layer of silty clay containing preserved pollen and freshwater microfossils.
Topic: 
Climate Change
Topic: 
Cores
Activity Type: 
Kits and Loan Items
Grade level: 
5-8
Grade level: 
9-12
Grade level: 
Informal

The sediment cored at Saanich Inlet off Vancouver Island, British Columbia contains evidence of catastrophic flooding events – called Jokulhlaups (Icelandic, o-kul-loop) that took place at the end of the Pleistocene and Early Holocene. This is when the Ice Age came to an end and increasing global temperatures caused glacial dams to form large lakes that eventually drained dramatically when the dams melted and broke. This core shows an abrupt 30cm layer of silty clay containing preserved pollen and freshwater microfossils (diatoms and silicoflagellates) whose source can be traced back to glacial lakes 200km inland. This layer is positioned between two laminated layers of mud containing marine microfossils.

How to use the core model with students:

  1.     Review the Saanich Inlet background information, the Glacial Flood Poster (42MB) and other resources provided with the kit.
  2.     Use What You See Is What You Get< with the core model instead of or along with the core photos referenced in the activity.