The St. John Del Rey Mining Company, Limited, Minas Geraes, Brazil
The St. John Del Rey Mining Company, Limited, is an English company owning 150 square miles -of mining lands near Belo Horizonte, Minas Geraes, Brazil. The area is 2,300 to 5,000 feet above sea level, with a pleasant and healthy climate. Bedrock is Precambrian. The Nova Lima series of metamorphosed sediments and some volcanics is overlain unconformably by the Minas series of quartzites, itabirites. etc. Batholithic granite and gneiss cut both series and basic dykes cut all these rocks.
banded iron formation, dolomite, Nova Lima, quartzite, schist, Gold, Itabirite, Mine, Mines, Ore, Ores, Quartzites