Description :
Orthopyroxene-biotite monzogranite-diorite gneiss (unit Pmdg) east of York Sound, Meta Incognita Peninsula, Baffin Island, Nunavut. Monzogranite host is white to brown, whereas the diorite is black and occurs as enclaves. View to the west. Hammer is 35 centimetres long. Photograph by M.R. St-Onge (2014).