--> Figure 9

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Figure 9. Photographs of Pliocene shelf-deltaic deposits of Gros Morne Formation of the Columbus Basin outcropping along the southeast coast of Trinidad show soft-sediment deformation, including (a) large channel scour truncating underlying fine-grained sandstone, siltstone, and claystones deposited in a shelf deltaic setting. The channel scours into structurally tilted sediments. Its irregular base is filled with large rectangular blocks, which were semicohesive when deposited and are composed of the substrate material. The remainder of the channel is filled with alternating wavy-bedded silty sands and shales. (b) Flame structure, characteristic of these rapidly deposited sediments. Location of photos shown in Figure 4.