You see all that unconsolidated lots of boulder, lots of mud, sand, etc.
from there up is all up until the soil horizon
which is right below the tree roots just well, actually
even the tree roots are it this is all glacial.
till from the last ice age, Wisconsin ice age, about
10 to 14,000 years ago.
But this level here is the 70, about 74 million year old Wapiti Formation.
And these rocks are part of it as well.
So that's the situation.
74 million year old rocks overlain by a 14,000 year old glacial,
unstratified glacial till.
In geology speak we call that an unconformity.