Deformed Belemnite

LEFT: Stretched beleminite fossil exposed on a cleavage plane in the Swiss Alps. The boudinaged segments of the fossil are dark-colored whereas newly precipitated calcite (white) fills the gaps. The belemnite fossil was more competent (higher viscosity) than the shales around it at the time of deformation. Photo credit: Rob Knipe. Image from the website:

Right: Part of a stretched belemnite from the Rhone valley, Switzerland. The space between the broken pieces of the belemnite are filled with precipitated material. The more translucent material in the middle of the gaps is quartz, the material closer to the pieces is calcite. Photo credit: Martin Casey. Image from the website: