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Gigapans

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  1. There is one rock exposed along the Billy Goat Trail which is a bit more enigmatic. It is amphibolite, a metamorphic rock very rich in the mineral amphibole (a.k.a. hornblende), which shows up as black in this picture. The white portions of the rock are plagioclase feldspar. This is a very mafic metamorphic rock, with ...

  2. 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...