December 4, 2017

Monday Geology Picture: Garnet Biotite Tabletop

Posted by Evelyn Mervine

Red garnet and black biotite… in a tabletop! South African coin for scale.

Since re-starting my blogging, I missed a few weeks of weekly pictures. My apologies! Life with a newborn does not leave much extra time, I’m afraid! I’ll try to be more consistent with my blogging in December and going into the new year.

However, I have a great picture for today: a close-up snap of a lovely stone tabletop that I recently saw, believe it or not, at a McDonald’s here in Cape Town — the one near the stadium downtown. You can see some beautiful minerals in this particular tabletop: garnet, biotite, feldspar, and quartz. The dark red garnet and black biotite stand out in particular.

The tabletop was really lovely, with some light and dark gneissic banding.

Here are a couple more views:

Another view of the tabletop.

One last view of the tabletop.