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Subject
- Geology, Stratigraphic51
- Geology31
- Paleontology11
- Petroleum8
- Stratigraphic correlation8
- Natural gas6
- Ammonoidea5
- Geology, Structural4
- Jurassic Geologic Period4
- Groundwater3
- Aquifers2
- Petroleum reserves2
- Rocks, Igneous2
- Albite1
- Ammonoidea, Fossil1
- Animals, Fossil1
- Clastic pipes1
- Clay minerals1
- Coal1
- Coal mines and mining1