The New Encyclopaedia Britannica, Volumes 1-10Encyclopaedia Britannica, 1974 - Reference [1] Propaedia: outline of knowledge and guide to the Britannica.--[2]-[11] Micropaedia: ready reference and index.--[12]-[30] Macropaedia: knowledge in depth. |
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Page 150
... rock strata ) , east of the Yenisey River , the Paleozoic strata are cut by numerous intrusive sills ( lay- ers ) of a dark , fine - grained , basaltic rock known as trap- rock , locally associated with copper and nickel ores and ...
... rock strata ) , east of the Yenisey River , the Paleozoic strata are cut by numerous intrusive sills ( lay- ers ) of a dark , fine - grained , basaltic rock known as trap- rock , locally associated with copper and nickel ores and ...
Page 384
... rocks . Sim- ilar to metal - bearing greenstone rock belts occurring in the nuclei of the ancient shield areas of other continents , these are being studied in the hope that the origin of these rock belts and their ore bodies will be ...
... rocks . Sim- ilar to metal - bearing greenstone rock belts occurring in the nuclei of the ancient shield areas of other continents , these are being studied in the hope that the origin of these rock belts and their ore bodies will be ...
Page 389
... rocks . In the far southwest , the Darling Range forms an up- faulted block underlain mainly by granite but capped by laterite , a reddish , iron - rich product of weathering rock . The Gawler Block in the southeast , is complex . There ...
... rocks . In the far southwest , the Darling Range forms an up- faulted block underlain mainly by granite but capped by laterite , a reddish , iron - rich product of weathering rock . The Gawler Block in the southeast , is complex . There ...
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The New Encyclopaedia Britannica, Volumes 1-10 Encyclopaedia Britannica Publishers, Inc. Staff No preview available - 1974 |
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