FOSSILS

Madagascar also presents the prestige of the past, witnesses of distant eras. The company ZO.A.RA offers ammonites, petrified wood and septarian.

AMMONITES

Ammonites are a group of fossil marine animals of the class of cephalopod molluscs.

The shell is generally the only fossilized part. It is in the form of a flat spiral with contiguous towers. Some forms have a non-contiguous, helical or totally uncoiled spiral: these are called heteromorphous ammonites.

The ammonite shell is subdividedThe shell is subdivided into a phragmocone divided into boxes (separated by lines of sutures characteristic of each species) and in a box of habitation where the soft body of the animal is located. All the boxes communicate thanks to a ventral siphon.

The term “ammonite” applies only to species that have lived in the Mesozoic (Triassic-Jurassic-Cretaceous). The present animal morphologically closest to ammonites is the nautilus.

PETRIFIED  WOODS

Petrified wood is a very special substance. Originally a tree trunk composed of fossilized wood where all traces of organic matter have been replaced by minerals (mostly silicates, such as quartz), while retaining the original structure of the wood.

Petrification occurs when wood is buried under a layer of sediment, where it is preserved first due to lack of oxygen, before mineral-rich water circulates in the sediment and replaces little To little wood cells by minerals. Less than a hundred years are probably necessary for certain pieces of wood to be petrified

 

SEPTARIAS

Composed of a mixture of Yellow Calcite and Sandstone, Septaria is a very soft stone that works on the deep mechanisms governing the construction of the emotional plane and its memories.