English Geology of the Rocky Mountains Cited by user Hike395 on 18 Nov 2023 The geology of the Rocky Mountains is that of a discontinuous series of mountain ranges with distinct geological origins.
English Grouse Creek block Cited by user Graeme Bartlett on 28 Nov 2012 The Grouse Creek block is a block of 2.5 to 2.6 billion year old orthogneisses (a type of gneiss) and similar metasedimentary rocks.
English Geology of Idaho Cited by user Graeme Bartlett on 28 Nov 2012 The Geology of Idaho is complex, with outcroppings of differing ages of volcanics, undifferentiated metamorphics and sedimentary structures.