Aragonite ps. After Belemnites (1919 - Philadelphia Academy)

Item Description

This classic old-time South New Jersey locale is famous for Cretaceous sedimentary rock with fossils, minerals, phosphate nodules and phosphate replacement of fossils (belemnites). Mullica Hill has long been known for vivianite which occurs principally as a replacement of calcareous fossils, belemnites and oyster-like shells of the genus Exogyra (MINDAT). The large limonitic matrix hosts sections of belemnites that have been replaced by both aragonite and vivianite. The impresssive large aragonite pseudo is 5.3 cm long and dramatically shows the radial replacment by the aragonite. Ex Philadelphia Academy of Sciences Collection # 9225 and collected by famous Academy Curator, Sam Gordon, in 1919. The numbers match. See the Mullica Hill article in the 1980 Mineralogical Record, Vol. 11, No. 5.