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55.0 Dark gray slate. Central Virginia. This aphanitic rock displays typical slaty structure and a slight red coloration, probably due to oxidation of iron-bearing minerals to hematite. [Scale shows cm divisions.]
Image 114 of 156
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![55.0 Dark gray slate. Central Virginia. This aphanitic rock displays typical slaty structure and a slight red coloration, probably due to oxidation of iron-bearing minerals to hematite. [Scale shows cm divisions.]](../55.0.JPG)