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This illustration shows the calcareous shell Fusulina cylindrica. These shells are mostly very small, and yet through their abundance they have been very important in limestone-making.

Fusulina Cylindrica

This illustration shows the calcareous shell Fusulina cylindrica. These shells are mostly very small,…

This illustration shows the calcareous shell Fusulina cylindrica. These shells are mostly very small, and yet through their abundance they have been very important in limestone-making.

Fusulina Cylindrica

This illustration shows the calcareous shell Fusulina cylindrica. These shells are mostly very small,…