Microsection of Syenitic Rock showing the occurrence of metallic sulphides as original constituents of igneous rocks. Black grains consist of PbS and FeS. Photographer: Unknown
Scope & Content:
Genre: Scientific Photography Photomicrograph, circular image, mounted facing p. 162.
The veinlet, VV, shows a very fine grained structure due to metasomatic replacement of country rock by the irregular veins of calcite. Photographer: Unknown
Scope & Content:
Genre: Scientific Photography Photomicrograph, circular image, mounted facing p. 158.