Nonskeletal Carbonates
87
Fig. 3.9. Calcareous oolites, produced within tidal zone by algal activity. Upper Air photo of oolite
sand bars, Bahama Banks. Note tidal channels. [Photo courtesy D. L. Eiche r] . Lower SEM photos of
oiids, scale bar 5 J..lm; left slightly etched section. Three secondarily filled borings (h) intersect the
concentric laminae of primary oolite coating; right close-up of oolite laminae, showing acicular
aragonite needles. [Photos D. Fiitterer]
87
Fig. 3.9. Calcareous oolites, produced within tidal zone by algal activity. Upper Air photo of oolite
sand bars, Bahama Banks. Note tidal channels. [Photo courtesy D. L. Eiche r] . Lower SEM photos of
oiids, scale bar 5 J..lm; left slightly etched section. Three secondarily filled borings (h) intersect the
concentric laminae of primary oolite coating; right close-up of oolite laminae, showing acicular
aragonite needles. [Photos D. Fiitterer]