twinning

alkali feldspar phenocrysts in monzogranite — Sant'Andrea is an open-air museum of igneous geology.

What are the white ‘stones’ nestled in the rocks of Sant’Andrea (Elba)?

s.papeschi
08/01/202209/01/2022
2 Comments
On the rocks

I was a student the first time I visited the outcrops of Sant’Andrea in the far 2011. We must have looked really weird: a class… Read More »What are the white ‘stones’ nestled in the rocks of Sant’Andrea (Elba)?

Walking on a carpet of HUGE calcite crystals (Moriglion di Penna, Lucca, Italy)

s.papeschi
28/08/202130/08/2021
On the rocks

When I was teaching with the course of Geology I in Pisa, I used to tell students: “the best way to learn how to recognize… Read More »Walking on a carpet of HUGE calcite crystals (Moriglion di Penna, Lucca, Italy)

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