Geology and Minerals
The Kondyor Massif (Russian: горы Кондёр) or Konder is a circular intrusion of igneous rock, about 8 kilometres (5 mi) in diameter. It is located in Khabarovsk Krai, Russia, c. 600 km (373 mi) west-southwest of Okhotsk, or c. 570 km (354 mi) south-east of Yakutsk. It is reached from Yakutsk by road via Amga. It is an important source of platinum. The Kondyor Massif stands as a textbook example of a ring intrusion, renowned for its remarkable geometric circularity and distinct ridge-and-depression topography. It serves as a global reference site for the study of alkaline-ultramafic magmatism and associated platinum-group element mineralization. Since 1984, Artel Starateley "Amur" (part of the Russian Platinum group) has developed this alluvial platinum deposit.
Environmental impact of the oil shale industry.
Geology and geological history of California.
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