Blog & News

‘Gneiss’ Rocks

Mon 05 August 2019

Category: Gneiss Rocks

Meteor Crater in Arizona. The crater is approximately one mile across and 550 feet deep.It is believed to have formed 50,000 years ago.

From Dr David Dutton

Share your ‘Gneiss’ Rocks
Email rosy@pesgb.org.uk with your photos