| 词条 | Ash Hollow Formation |
| 释义 |
| name = Ash Hollow Formation | image = | caption = | type = Formation | age = Neogene | period = Neogene | prilithology = | otherlithology = | namedfor = | namedby = | region = South Dakota | country = United States | coordinates = | unitof = | subunits = | underlies = | overlies = | thickness = | extent = | area = | map = | map_caption = }} The Ash Hollow Formation of the Ogallala Group is a geological formation found in Nebraska and South Dakota. It preserves fossils dating back to the Neogene period. It was named after Ash Hollow, Nebraska and can be seen in Ash Hollow State Historical Park.[1] See also{{Portal|Earth sciences|South Dakota|Paleontology|Neogene|Cenozoic}}
References1. ^{{cite web | url = https://www.researchgate.net/publication/267197598_Geologic_History_of_Ash_Hollow_State_Historical_Park_Nebraska | year = 1996 | title = Geologic History of Ash Hollow State Historical Park, Nebraska | publisher = University of Nebraska - Lincoln | author = Robert Diffendal, Jr., Roger K. Pabian, and J. R. Thomasson}}
4 : Neogene United States|Neogene geology of Nebraska|Neogene geology of South Dakota|Neogene geology of Wyoming |
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