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Oil shale layers

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P1001609.jpg Abandoned branch缩略图No swimmingAbandoned branch缩略图No swimmingAbandoned branch缩略图No swimmingAbandoned branch缩略图No swimmingAbandoned branch缩略图No swimmingAbandoned branch缩略图No swimmingAbandoned branch缩略图No swimming

Слои сланца и породы

Põlevkivi kihid