It was annotations like these which helped Charles Lapworth solve the Highlands controversy. In 1882, he began #mapping Durness and Eriboll. He was familiar with the latest #research in the Alps, and realised that the superposition of #metamorphosed #gneiss above #limestone was due to thrusting!

Microscope photo of an ovoid fossil preserved as blue green phosphate. It has a crinkled margin and a chagrinate surface texture.

#FossilFriday another of type of preservation of the #metamorphosed #fossils are these blue and green types. These are preserved as a mix of phosphate, and Fe-Clay with organic matter. #geology #paleontology ⚒️ 🧪

Greenstone is a common generic term for valuable, green-hued minerals and metamorphosed igneous rocks and stones which early cultures used in the fashioning of hardstone carvings such as jewelry, statuettes, ritual tools, and various other artifacts. Greenstone artifacts

#Greenstone is a common generic term for valuable, green-hued minerals and #metamorphosed igneous rocks and stones which early cultures used in the fashioning of hardstone carvings such as jewelry, statuettes, ritual tools, and various other artifacts. Greenstone artifacts

#Greenstone is a common generic term for valuable, green-hued minerals and #metamorphosed igneous rocks and stones which early cultures used in the fashioning of hardstone carvings such as jewelry, statuettes, ritual tools, and various other artifacts. Greenstone artifacts