episodes of ridge and mudflat formation on prograding
shore sectors. Mudflat progradation must bracket the
ridge: a marsh-covered or barren preexisting mudflat in
its rear, and a younger, possibly still active mudflat seaward (Otvos and Price, 1979; Otvos, 2000).
There are two main types of chenier plains depending
on the type of coast in which they develop. Bight-coast
chenier plains include those forms of the West Louisiana
and Guiana coasts. In this setting, a broad indentation of
the bight coast contributes to a decrease of wave energy
Cheniers and Regressive Bedforms, Figure 2 Development of gravel and chenier plains of the San Sebastia ´n Bay, Tierra del Fuego
(Modified after Vilas et al., 1999).
Cheniers and Regressive Bedforms, Figure 3 Development of the Parana ´-Uruguay composite delta (Modified from Cavalotto
et al., 2005).
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