Is Winiger Ridge a Glacial Deposit?

On the way back from the post office, I notice a large white van parked on Lazy Z at about the .5 mile marker.  There where about 10 people standing at the side of the road.

Curious, I stopped and joined them.

The group was a geology class being lead by Ken Hopkins of the University of Northern Colorado.

I learned that IF this was a glacial deposit, then it would be between 600,000 and 1.2 million years old.  However, it is uncertain if this is what Winiger Ridge actually is.