Figures and Plates for the Cold Canyon Geology Report 

  Figures

Figure 1. Stratigraphic column for the southwestern Sacramento Valley showing stratigraphic units, benthic foraminifera zones, and petrofacies units (After Unruh et.al. 1992).

Figure 2. Schematic cross section of the blind thrust system beneath the Rumsey Hills and Dunnigan Hills in the southwestern Sacramento Valley. Uplift in the eastern Coast Ranges and homoclinal tilting of the mountain front result primarily from the growth and propagation of an eastward tapering triangle zone. Folding along the eastern mountain front is believed to be due east-vergent blind thrusting within the triangle (After Unruh et al., 1992).

Plates

Plate I. View to the southwest overlooking Cold Canyon Reserve and Blue Ridge.
Plate II. Bouma divisions and fining upward sequences in sandstone and shale of the Yolo Formation.
Plate III. View to the south of resistant sandstones in the Sites Formation.
Plate IV. Sedimentary structures: convolute bedding, load structures, and scour and fill marks in the Sites Formation.
Plate V. View to the west of Venado Formation with landslide in foreground.  The landslide's contact with the underlying bedrock can be traced just below the rock outcrops .
Plate VI. Anticlinal fold in Venado Formation.
Plate VII. Faulted Sites Formation near the entrance to the reserve.  The fault occurs slightly above-right of the human in the foreground.
Plate VIII. View to the west of recent debris flow scar near spring location.
Plate IX. View of debris flow scarp near spring location.   Note the notebook at bottom center for scale.
Plate X. Outcrop of Yolo (?) Formation at spring location. Note calcium carbonate deposit.
Plate XI. View to the north of exposure of overturned beds in the west bank of Cold Canyon Creek. Tops to the east (right on photo).
Plate XII.  Close-up view of overturned beds in the west bank of Cold Canyon Creek. Tops to the east (right on photo).  Note camera lens for scale in lower left corner.