Whidbey Formation

I really do not like seeing this unit on steep shoreline slopes. It is ill behaved. This particular exposure is likely the Whidbey Formation, an interglacial unit deposited approximately 100,000 years ago. It contains some clay, has a bad habit of soft sediment deformation and is associated with a number of large deep-seated land slides. I was not happy to see this unit on a recent field project assessing slope stability. More on this after I get the report written.