Abstract

A part of the oolite-forming area in Laguna Madre contrasts with the "high energy" environment suggested in the "classical theory" for oolite generation. Although the wave-swept shoreline is the principle site of formation, an important and distinctive type of oolite is forming offshore in quiet water. Rooted "grass" of the species Ruppia maritima testifies to the low energy level of the latter environment, which is is protected by an adjacent barrier bar. The low energy of the offshore area is reflected in: 1) the lack of mechanically produced polish on the oolites and associated shell fragments, and 2) the high degree of asymmetry developed in many of the oolitic growths.

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