Figure 13.--Photographs of features in proximal turbidites
(classification of Walker, 1967) in the main turbidite member
of the Minturn Formation at stop 3.
A) Bouma sequences with massive to graded intervals
separated by shaley partings. Note large shale clast beneath pick..
B) Granules and small pebbles are visible in
many graded intervals of Minturn Bouma sequences.
C) Proximal turbidite showing a thick graded
interval, a prominent shale clast, and a basal contact that appears
to be erosional on underlying thin beds.
D) Prominent flame structures above pick are assymetric
load casts, suggestive of formation during deposition. The upper
part of the graded bed with flame structure has been scoured by
the overlying graded bed (middle of photo).
E) Amalgamation of two graded beds (center),
suggestive of 1) erosion and scouring by turbidity flows, or 2)
separation of a single turbidity flow into two flows.
F) Zoophycus trace fossils in float (examples
can be found at stop 3, but this photograph was taken west of
of Cotton Lake).