Changes

Shoreface sands are deposited along shorelines, and they generally form extensive, high-quality reservoir systems ([[Figure 191]]). Wave action and occasional storms act to deposit sand along the shoreface. The lower shoreface lies below fair-weather wave base but can be affected by storms; the sands tend to be siltier and more poorly sorted by comparison to the upper shoreface, where the sands have been subjected to wave winnowing. A shoreface deposit separated by a lagoon from the land is known as a barrier island.

Shoreface sands are deposited along shorelines, and they generally form extensive, high-quality reservoir systems ([[Figure 191]]). Wave action and occasional storms act to deposit sand along the shoreface. The lower shoreface lies below fair-weather wave base but can be affected by storms; the sands tend to be siltier and more poorly sorted by comparison to the upper shoreface, where the sands have been subjected to wave winnowing. A shoreface deposit separated by a lagoon from the land is known as a barrier island.

[[File:M91FG191|thumb|300px|{{figure number{{1}}|The photograph shows a shoreface profile on St. Cyrus Beach, Scotland. The beach is just over a hundred meters wide. Reservoir properties are influenced by the degree of wave reworking up the shoreface profile. Lower figure from McCubbin (1982). Reprinted with permission from the AAPG.]]

[[File:M91FG191.JPG|thumb|300px|{{figure number{{1}}|The photograph shows a shoreface profile on St. Cyrus Beach, Scotland. The beach is just over a hundred meters wide. Reservoir properties are influenced by the degree of wave reworking up the shoreface profile. Lower figure from McCubbin (1982). Reprinted with permission from the AAPG.]]

==Shoreface sands form layer-cake geometries==

==Shoreface sands form layer-cake geometries==