Presentation :
Etymology: from the Greek "barrus" = heavy, due to its high density.
Its genesis is mainly hydrothermal. It consists of barium, a crumb of lead, a hint of calcium and may co...
Presentation :
Etymology: from the Greek "barrus" = heavy, due to its high density.
Its genesis is mainly hydrothermal. It consists of barium, a crumb of lead, a hint of calcium and may co...
Presentation :
Stromatolites are limestone rocks in thin superimposed layers at the limit of the organic and mineral kingdom: A kind of green algae. It appeared at the very beginning of life on...
Presentation :
Stromatolites are limestone rocks in thin superimposed layers at the limit of the organic and mineral kingdom: A kind of green algae. It appeared at the very beginning of life on...
Presentation :
Stromatolites are limestone rocks in thin superimposed layers at the limit of the organic and mineral kingdom: A kind of green algae. It appeared at the very beginning of life on...
Presentation :
Stromatolites are limestone rocks in thin superimposed layers at the limit of the organic and mineral kingdom: A kind of green algae. It appeared at the very beginning of life on...
