Boudinaged Dike

Boudinaged amphibolite dike (dark) within gneisses of the Laxfordian complex near Durness, Scotland. Note how the gneiss has "flowed" into the spaces between the amphibolite boudins. The amphibolite was more competent (higher viscosity) than the gneisses at the time of deformation. Photo credit: Rob Knipe. Image from the website: http://earth.leeds.ac.uk/learnstructure/index.htm