Edinburgh Castle

Not sure what to blip, so I ended up a bit of a wander in the city centre, where, I blipped a nighttime view of the castle.

The castle stands upon the plug of an extinct volcano, which is estimated to have risen about 350 million years ago during the lower Carboniferous period. The Castle Rock is the remains of a volcanic pipe, which cut through the surrounding sedimentary rock before cooling to form very hard dolerite, a type of basalt. Subsequent glacial erosion was resisted by the dolerite, which protected the softer rock to the east, leaving a crag and tail formation.

I thought you might like a bit of geology instead of history!

Nearly the weekend, hurrah!