Category:Helms Formation
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Subcategories
This category has the following 2 subcategories, out of 2 total.
Categories:
- Geologic formations in Texas
- Carboniferous formations in Texas
- Fossil bearing geologic formations in Texas
- Geologic formations in New Mexico
- Carboniferous formations in New Mexico
- Fossil bearing geologic formations in New Mexico
- Carboniferous fossil bearing formations in the United States
- Shale formations in Texas
- Shale formations in New Mexico
- Limestone in Texas
- Carboniferous limestone in New Mexico
- Carboniferous sedimentary rocks in Texas
- Carboniferous sedimentary rocks in New Mexico
- Carboniferous shale in the United States
- Carboniferous limestone in the United States
- Carboniferous southern paleotropical deposits in the United States