Abstract

ABSTRACT Deposits resulting from a single violent typhoon that struck a Pacific atoll consist of (1) coarse gravel ridges on the reef flat, (2) new or augmented beach ridges of gravel, (3) gravel sheets, ranging from one-half to three feet in thickness, across two-thirds of some islets, and (4) sediment redeposited on the lagoon sides of many islets. These storm deposits differ greatly in texture and structure from those formed in corresponding places under normal environmental conditions. In addition, storm sediments of the lagoon floor are relatively coarser at any particular depth than those formed under other conditions. Both storm and normal types are recognized in sections that expose earlier islet deposits.

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