A Fossil Fir Cone Slice 81mm with a great fossil lineage discovered in Argentina, previously Patagonia, from the prehistoric supercontinent of Pangea. The fir cone displays attractive and variegated colour minerals, some in the form of quartz. The fossil fir cones of this origin of Patagonia are of the genus Araucaria. The specimen featured here is an interesting example of a female seeded fir cone, displaying familiar attributes exceedingly well.
The colouration of ovules which are the immature seeds and a darker mineral filling towards the outer edges of the now cut and polished slices are darker in tone, the ovules picked out in even darker mineral colours. The delightful preservation of the petrified fir cone is a joy to behold. Also evident is the outer woody leaves or scales as they are scientifically known, These have maintained the familiar shape of a modern fir cone.
The interesting process of per-mineralisation is one of water carrying minerals of the surrounding earth is forced through the soft tissues of the once living fir cone. In a reaction which affects the fir cone at a molecular level, the cone is petrified, the cone absorbs the minerals which grow to what we see today, quartz in the form of Jasper.