| 1. | It is part of the Early Pennsylvanian / Upper Carboniferous period.
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| 2. | This Upper Carboniferous outcrop is part of the Ibbenb�ren Coalfield.
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| 3. | Kilmond Scar is a prominent south-facing scarp of Upper Carboniferous Limestone.
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| 4. | The geologic range of the order extends from the Upper Carboniferous to the Triassic.
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| 5. | Geologically, the region is defined by coal-bearing layers from the upper Carboniferous period.
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| 6. | A major geological feature of the Upper Carboniferous rocks in south Wales is the south Wales coalfield.
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| 7. | Previously, the Oegophiurida were known only to exist from the lower Ordovician to the upper Carboniferous periods.
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| 8. | To the extreme east is the Red Rock fault, and the older rocks from the Upper Carboniferous period surface.
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| 9. | An inlier of upper Carboniferous rocks occurs to the south of Chester though it too is obscured by superficial deposits.
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| 10. | A major geological feature of the Upper Carboniferous sub-period in South Wales is the South Wales Coalfield syncline.
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