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Ptygmatic folding in migmatite on Naissaar Island, Estonia Migmatite on the coast of Saaremaa, Estonia Intricately-folded migmatite from near Geirangerfjord, Norway. Migmatite is a composite rock found in medium and high-grade metamorphic environments, commonly within Precambrian cratonic blocks.
Volcanogenic massive sulfide ore deposit at Kidd Mine, Timmins, Ontario, Canada, formed 2.7 billion years ago on an ancient seafloor A cross-section of a typical volcanogenic massive sulfide (VMS) ore deposit as seen in the sedimentary record [1]
Pegmatite with blue corundum crystals Pegmatite containing lepidolite, tourmaline, and quartz from the White Elephant Mine in the Black Hills, South Dakota Proterozoic pegmatite swarm in the headwall of the cirque of a small mountain glacier, northeastern Baffin Island, Nunavut
The geology of Egypt includes rocks from Archaean - early Proterozoic times onwards. These oldest rocks are found as inliers in Egypt ’s Western Desert . In contrast, the rocks of the Eastern Desert are largely late Proterozoic in age.
The Aravalli Mountain Range in Rajasthan, India The Aravalli Mountain Range is in the northwestern part of India.. The Aravalli Mountain Range is a northeast-southwest trending orogenic belt in the northwest part of India and is part of the Indian Shield that was formed from a series of cratonic collisions. [1]
Modelling of a fold and thrust belt in a sand box. A fold and thrust belt (FTB) is a series of mountainous foothills adjacent to an orogenic belt, which forms due to contractional tectonics.
Gangotri glacier (Sanskrit and Hindi: गंगोत्री) is located in Uttarkashi District, Uttarakhand, India in a region bordering Tibet.This glacier, one of the primary sources of the Ganges, has a volume of over 27 cubic kilometers. [1]
There are two principal phases of underground mining: development mining and production mining. Development mining is composed of excavation almost entirely in (non-valuable) waste rock in order to gain access to the orebody. There are six steps in development mining: remove previously blasted material (muck out round), scaling (removing any unstable slabs of rock hanging from the roof and ...