抄録
Three main textures may occur in optically granular walls of hyaline calcareous foraminifera : mosaic granular, jagged granular, and minute granular. The size and shape of the optical granules within them indicates that these wall textures are intimately related to the crystalline arrangement of the units and their elements, and also to the wall thicknesses of the foraminiferal tests. Highly complex minute-granular textures are observed if the foraminiferal tests are large and walls are thick. In general, crystallographically compound and intermediate wall structures correspond to the minute-granular texture. Both formsize (ratio of perimeter to area) and Shannon-Wiener index for polarized crystal units explain these different wall textures well. This study suggests a method for quantification of wall textures based on image processing.
