Discussion
...................... is a type of cross bedding which is characterised by oppositely dipping directions of foreset laminae in adjacent sediment layers.
Answer: C
This is herringbone cross bedding.
Where currents reverse direction, as with flood and ebb tides, successive sets of cross-strata have foresets dipping in opposite directions. In section the alternating sets look like the bones of a fish, hence the name, and the structure is a classic indicator of tidal deposition.
Flaser and lenticular bedding are also tidal structures, but they describe mud drapes in ripple-laminated sand (flaser) or isolated sand lenses in mud (lenticular), not opposed foreset directions. Hummocky cross bedding is a storm-wave structure of gently curved, low-angle laminae.
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