Polished Trochactaeon.
From collection Fossil collection by Lukas Wallentin
Polished Trochactaeon specimen
This specimen is a fossilized gastropod of the genus Trochactaeon, characteristic of the Late Cretaceous period. It is presented as a cut and polished cross-section, which provides a detailed view of the internal shell morphology. The spiral whorls are clearly delineated by mineral replacement, showing a light tan to cream-colored calcification. The chambers of the shell are filled with a dark, fine-grained sedimentary matrix, creating a high-contrast visual pattern. Within some of the central areas, small vugs or cavities are present, lined with minute, translucent crystals (druse). The unpolished side of the specimen reveals the natural state of the fossil within its host rock, which appears as a dark, brownish-grey limestone. The exterior surface is irregular and weathered, showing the typical robust, conical profile of this extinct marine snail. This type of preparation is commonly used for Acteonellid gastropods to highlight the complex internal structures that are otherwise hidden within the solid rock. No external labels or inscriptions are visible on either the polished or the raw surfaces of the specimen.
Trochactaeon sp.
Cretaceous
90.00 Mio. Jahre
Very good
One side is cut and polished to a high gloss; the reverse side is left in its natural, unpolished matrix state.
Cross-section of the fossil showing internal spiral whorls and mineralized chambers.
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection