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The cancellation of the body whorl is strongly developed, so that the pittings between the cross- ridges are deep and striking. The suture is deep and channelled. The uppermost of the six revolving lirae borders the channelled suture, and the umbilicus is encompassed by a swollen ridge, which is in addition to the six line referred to. The microscopic striae are seen upon the lirae.
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The length of the shell attains 4.5 mm, its diameter 2 mm. (Original description) This is a pure white, curtly pyramidal species, the surface not shining. It contains six turreted whorls, angled at the suture, ventricose, longitudinally thickly ribbed, transversely ornamented with few lirations. In the middle of the upper whorl and doubly-ranked in the body whorl, are transverse regular deep pittings, squarrose, profound, between tlie ribs, which suggest the trivial name (from Ancient Greek : thyridotos : furnished with windows or doors).
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In 1900, Franz Eduard Suess pointed out that the gravel-size moldavites exhibited curious pittings and wrinkles on the surface, which could not be due to the action of water, but resembled the characteristic markings on many meteorites. He attributed the material to a cosmic origin and regarded moldavites as a special type of meteorite for which he proposed the name of tektite. Because of their difficult fusibility, extremely low water content, and chemical composition, the current consensus among earth scientists is that moldavites were formed about 14.7 million years ago during the impact of a giant meteorite in the present-day Nördlinger Ries crater. Splatters of material that was melted by the impact cooled while they were actually airborne and most fell in Bohemia.
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