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| Cambrian - Conococheague limestone; Elbrook formation; Waynesboro formation; Tomstown limestone; Antietam sandstone; Harpers schist; Montalto quartzite ; Weverton sandstone (1) |
| Devonian - Chemung formation; Oriskany formation (1) |
| Geology -- Pennsylvania -- Franklin County -- Maps (1) |
| Geology -- Pennsylvania -- Fulton County -- Maps (1) |
| Geology -- United States --Maps (1) |
| Neogene - unnamed strata (1) |
| Ordovician - Juniata formation; Martinsburg shale; Chambersburg limestone; Stones River limestone; Beekmantown limestone (1) |
| Paleogene - unnamed strata (1) |
| Pre-Cambrian - unnamed strata (1) |
| Silurian - Helderberg limestone; Cayuga formation; Clinton shale; Tuscarora sandstone (1) |