The matrix of the ore is a dark-green chlorite rock with grains and kernels of quartz. Sometimes reef quartz replaces the chlorite. The chlorite rock is in all probability a dyke, originally erupted as a quartzosedionte, and which has subsequently undergone...
Bowen River Coalfields: Preliminary Report Relating To) - Page 4
by Robert Logan Jack - 1883 - 2 pages
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