| 词条 | Gelli Formation |
| 释义 |
| name = Gelli Formation | image = | caption = | type = Formation | age = Ordovician | period = Ordovician | prilithology = | otherlithology = | namedfor = | namedby = | region = Wales | country = {{UK}} | coordinates = | unitof = | subunits = | underlies = | overlies = | thickness = | extent = | area = | map = | map_caption = }} The Gelli Formation is a geologic formation in Wales. It preserves fossils dating back to the Ordovician period. See also{{Portal|Earth sciences|Wales|Paleontology|Ordovician|Prehistory of Europe}}
References
3 : Geologic formations of Wales|Ordovician System of Europe|Ordovician Wales |
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