Wollastonite, Calc-silicate hornfels
Allanfield quarry, Leslie Vale, Kingborough municipality, Tasmania, Australia
Cut slab of calc-silicate hornfels, mostly wollastonite, plus diopside, quartz, feldspar, etc. It is fossil rich: the wriggly lines are fenestallid bryzoans, ovoid fossils are Branchiopoda, and dark grey to brown clasts are glacial dropstones.
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© R Bottrill