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Late Miocene Mount Messenger Formation exposures in north Taranaki, New Zealand, demonstrate contrasting styles of deepwater basin-floor fan and slope fan development. Some of these attributes may have analogs in subsurface thin-bedded, deepwater reservoirs.

Basin-floor fan settings are characterized by thick-bedded sandstone litho-facies (central lobe) and thin-bedded sandstone/siltstone lithofacies (lobe fringe). The thick- and thin-bedded sandstones were deposited by high-density mass flows. Stratigraphically higher slope fan units are invariably thin bedded. They display scouring at various scales and well-developed sedimentary structures that are indicative of deposition by turbidity flows. The slope fan depositional settings include individual and nested channels, and vertically stacked and shingled levee complexes.

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