Vol. 12 Núm. 1 (2005)

					Ver Vol. 12 Núm. 1 (2005)

Cover Photo: Jasperoid body as a result of the replacement of calcite (Jurasic travertine) by silica. Manantial Espejo Mining District, Santa Cruz Province, Argentina. Coin diameter 31 mm. Foto: H. Echeveste.

Publicado: 2005-07-01