Phonolite Hand Sample 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 Hand Sample

phonhs_001.Phonolite from Wolf Rock Island, England. This fine-grained phonolite was intruded approximately 130Ma and contains sanidine, nepheline, augite, and pyroxene. Image from the UK Virtual Microscope.



phonolite Hand Sample

phonhs_002. This phonolite is from the Cape Verde Islands, and presents phenocrysts of hornblende, sanidine, nepheline, aegirine, and sodalite that lie in a fine groundmass. Image from the UK Virtual Microscope.



phonolite Hand Sample

phonhs_003. Phonolite from the Leucite Hills, Sweetware County, Wyoming, USA. Vesicular hand smaple with small phenocrysts of sanidine and leucite visible. Cenitmeter scale. US Geological Survey Study Collection, Hamilton College (USGS-72). To see the original, zoomable image on ArtStor click here.