Nerita versicolor Gmelin, 1791 - four-toothed nerite snails exposed in a rocky shore intertidal zone.
These nerite snails are on an epikarstified aragonitic limestone surface in the intertidal zone. They are grazing on algal/bacterial films by scraping the rocks with their radulae. The limestone rocks are cross-bedded, aragonitic, calcarenitic eolianites, formed in a terrestrial, near-shore, wind-dominated, sand dune environment.
Stratigraphy: North Point Member, Rice Bay Formation, middle Holocene, ~5300 years old
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