Phonolite Thin Section Photos. Click on any photo for a larger image. Some of the larger images may be on other web sites and will open in a new window.

Phonolite Thin Section

phonts_001. Phonolite from Wolf Rock Island, England. This fine-grained phonolite was intruded approximately 130Ma and contains sanidine, nepheline, augite, and pyroxene. The border scales are in mm. Image from the UK Virtual Microscope.



Phonolite Thin Section

phonts_001. This phonolite is from the Cape Verde Islands, and presents phenocrysts of hornblende, sanidine, nepheline, aegirine, and sodalite that lie in a fine groundmass. The border scales are in mm. Image from the UK Virtual Microscope.