| 词条 | Petersburg Formation |
| 释义 |
| name = Petersburg Formation | image = | caption = | type = Formation | age = Pennsylvanian | period = Pennsylvanian | prilithology = | otherlithology = | namedfor = | namedby = | region = Indiana | country = United States | coordinates = | unitof = Carbondale Group | subunits = | underlies = Dugger Formation | overlies = Linton Formation | thickness = | extent = | area = | map = | map_caption = }} The Petersburg Formation is a geologic formation in Indiana. It preserves fossils dating back to the Carboniferous period. See also
References
2 : Carboniferous Indiana|Carboniferous southern paleotropical deposits |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。