SOLD | Fossilisierter Holzstamm Araucarioxylon arizonicum | Arizona, USA Black Kalium und Titan können vorhanden

Kalium und Titan können vorhanden sein

Its physical properties correspond to those of quartz

usually silicon dioxide (SiO2) or calcium carbonate (CaCO3)

this impressive mass extinction plate contains ammonites of various sizes

ist eine etwa 46 cm dicke

SOLD | Fossilisierter Holzstamm Araucarioxylon arizonicum | Arizona, USA Black Kalium und Titan können vorhandenOrigin: Arizona, USA Age: Triassic, 220 million years Size: H81cm W43cm L54cm Weight: 338kg Description: This attractive stem of Araucarioxylon arizonicum was cut and trimmed from a larger stem found near Petrified Forest National Park in Arizona. The outer surface is almost entirely covered in fossilized bark, which is an extreme rarity as the softer material is not often preserved. The tree trunk is cut open in cross section and polished to reveal