Figure 11. Meander belt facies:

(a)    point bar lithology: very fine-grained porous quartz sandstone with variably dipping paper-thin planar to slightly concave upward black shale partings (convolute bedding), possibly representing trough cross bedding that is commonly present in the lower part of point bar sandstones. Imperial Volmer 1-1-55-25 W4M, depth 3689 ft.

(b)   shale-filled channel lithology: fairly massive black shale containing near horizontally bedded thin brown siderite nodule. Imperial Volmer 7-1-55-25 W4M, depth 3709 ft.

(c)    shale-filled channel lithology: interlaminated black shale and white siltstone, penecontemporaneously deformed in overturned soft sediment slump structure. Imperial Volmer 7-1-55-25 W4M, depth 3712 ft.