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The Marcellus Formation or the Marcellus Shale is a Middle Devonian age unit of sedimentary rock found in eastern North America. Named for a distinctive outcrop near the village of Marcellus, New York, it extends throughout much of the Appalachian Basin.
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| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Marcellus Formation | Extent | 600 miles (970 km) | 1.00 | infobox |
| Marcellus Formation | Named by | James Hall, 1839 | 1.00 | infobox |
| Marcellus Formation | Named for | Marcellus, New York | 1.00 | infobox |
| Marcellus Formation | Other | Slate, limestone, sandstone, tuff | 1.00 | infobox |
| Marcellus Formation | Overlies | Huntersville Chert, Needmore Shale, and Onondaga Formation | 1.00 | infobox |
| Marcellus Formation | Primary | Shale | 1.00 | infobox |
| Marcellus Formation | Region | Appalachian Basin of eastern North America | 1.00 | infobox |
| Marcellus Formation | Sub-units | See: Named members | 1.00 | infobox |
| Marcellus Formation | Thickness | up to 900 feet (270 m) | 1.00 | infobox |
| Marcellus Formation | Type | Geological formation | 1.00 | infobox |
| Marcellus Formation | Underlies | Mahantango Formation and Skaneatales Formation/Stafford Lime Mbr | 1.00 | infobox |
| Marcellus Formation | Unit of | Hamilton Group | 1.00 | infobox |
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