Lewisian Gneiss Rock, Isle of Lewis -the Geology of the Outer Hebrides is important - as the predominant rock type is a Lewisian Gneiss - a metamorphic rock which is astonishingly up to 3 billion years old, making it the oldest rock in Britain - two thirds the age of the Earth.
Two activities to introduce or review information about the types of rocks; Igneous, Sedimentary, and Metamorphic. One focuses on the 3 main types of rocks, and the other is a simplified Rock Cycle Diagram with interpretation questions. Can be a teacher led activity or individual work time, or center activity.
The cliffs at Millook Haven in north Cornwall, England, have very striking folded rock formations. Their zig-zag recumbent folds form unusual chevrons. The metamorphic sedimentary rock of the cliffs is known as Killas and the folds were caused by the intrusion of granite.