4. – Rock, line and clay – Te Ara Encyclopedia of New ZealandJun 12, 2006 . Line, a sedimentary rock abundant in New Zealand, consists mainly of the bones and shells of tiny marine fossils made of lime (calcium carbonate). Rocks with more than 50% calcium carbonate are considered to be line. Most New Zealand line deposits formed in the Oligocene and.Geology of the Kamo Mine areaBy DAVID KEAR, New Zealand Geological Survey, Department of . Whangarei Line (Landon), and Waitakian sandstones arc referred to the. Te Kuiti Gronp. . to New Kamo No. 3 Mine, and further holes were drilled following the complcrt:e flooding of the mines in November 1955. The present. N,Z.,f. Ceol, Ceophys.
line mining in new zealand,Mineral exploration in the Northland region of New Zealand .Currently mining is dominated by line produced for New Zealand's largest cement plant at Portland, south of Whangarei, and for agriculture. High quality halloysite clay for ceramic manufacture is produced near Matauri Bay in the north of the region by industrial minerals company Imerys. Over the last 50 years, mainly.Mineral resources / Economic and applied geology / The Geology of .The large open pit mines at Macraes in Otago and Waihi in the Coromandel region are the largest in New Zealand. Copper has been mined as sulphide ore in . Suitable rocks for aggregate are some volcanic rocks, hard sandstone and line, plutonic rocks and some metamorphic rocks. Although many areas of New.
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4. – Rock, line and clay – Te Ara Encyclopedia of New Zealand
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Mineral exploration in the Northland region of New Zealand .
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