Sold Quick view Microbial mat. - cambrian - (Possible précambrian?) - Mt Simon Sandstone - Central Wisconsin - USA See details
Sold Quick view CYANOBACTERIA: YUKNESSIA SIMPLEX (walcott, 1919) - middle cambrian - Marjum Formation - Millard County, Utah, USA See details
Sold Quick view Chlorellopsis sp. - algae agate (Eukaroyte) avec des ostracodes - Eocène - Wyoming - USA See details