| 1. | The coal formation is estimated to be long, several miles wide, and thick.
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| 2. | The "'Mecsek Coal Formation "'is a Mesozoic geologic formation in Hungary.
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| 3. | The San Juan Basin contains the Fruitland coal formation.
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| 4. | Mill Creek passes through the Llewellyn coal formation at an elevation of approximately above sea level.
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| 5. | Based on his past studies of European peat bogs, Lesquereux developed theories on the origin of coal formations.
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| 6. | As sometimes happens in coal formations, the bone hadn't fossilized _ the organic material hadn't been replaced with rock.
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| 7. | The Carbondale coal formation occurs near Big Wapwallopen Creek and also appears as far away as the Wyoming Valley.
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| 8. | The coal industry of Maverick County is located along a section of the Olmos Coal Formation immediately north of Eagle Pass.
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| 9. | The wide, shallow seas of the Carboniferous Period provided ideal conditions for coal formation, although coal is known from most geological periods.
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| 10. | The Wealden dome is a Mesozoic structure lying on a Palaeozoic foundation, which can often create the right conditions for coal formation.
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