Cap rock is an impervious layer of hard rock that acts as a barrier which, in the case of an oil reservoir can prevent the upward migration of petroleum and other hydrocarbons. In open-cut coal mining the term refers to a hard and horizontally jointed competent layer above an unconsolidated (weathered) layer overlying a coal seam…
Read MoreCap rock is an impervious layer of hard rock that acts as a barrier which, in the case of an oil reservoir can prevent the upward migration of petroleum and other hydrocarbons. In open-cut coal mining the term refers to a hard and horizontally jointed competent layer above an unconsolidated (weathered) layer overlying a coal seam…
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