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To explore outcrop-scale gigapans of this ignimbrite, click here: gigapan.com/gigapans?order=most_recent&categories=&since=&query=green+ignimbrite&submit=Go
187 images taken on a home-brewed microscope (meiji biological microscope modified by me to work with polarised light and a Zeiss objective which gives a perfect, flat, field) with a Nikon D60 using direct objective projection. The section is from an OU set and is simply listed as an ignimbrite from Italy. The section...