Additional notes

A view of Gneiss

A boulder of Lewisioan Gneiss, clearly showing its stripes

Not just any lump of rock, but a boulder of Lewisian gneiss, clearly showing its stripes, bands of higher and lower density minerals separated out by huge temperatures and pressures thirty miles underground where it was formed. The picture below is a good indicator of what geologists like to call ‘hummocky terrain’.