Jurassic Ammonite Large Kranaosphinctes Rabei Ammonite...

Large fossil ammonite of the species Kranaosphinctes rabei, from southwestern Madagascar and dating to the Upper Jurassic, Oxfordian, approximately 161–156 million years ago. An impressive specimen, with a maximum diameter of 370 mm and a weight of 14,900 grams. The shell displays the typical structure of Kranaosphinctes: a broad, well-defined spiral, a deep central umbilicus, regular whorls, and robust radial ribs that give the fossil an architectural, highly decorative appearance. The surface features light shades ranging from creamy white and ivory to warm beige and honey, with ochre, brown, and rust-colored undertones. These colors are associated with fossilization in Madagascar’s ancient carbonate-rich marine sediments, which contain abundant calcite and pale materials. An important fossil from both a paleontological and ornamental perspective, ideal for a natural history collection, a study, a Wunderkammer, or as a striking decorative feature. Technical details Species: Kranaosphinctes rabei Family: Perisphinctidae Origin: Southwestern Madagascar Area: Sakaraha, Atsimo-Andrefana region, former province of Toliara/Tuléar Period: Upper Jurassic Age: Oxfordian, approximately 161–156 million years ago Maximum diameter: 370 mm Weight: 14,900 grams

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