inclined seam
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- precision processing
- artificial radioactive element
- discharge hydrograph
- ala twin
- temperature barrier
- sial
- acid geochemical barrier
- volcanic ejecta
- old plate tectonics
- organoclay
- greenwich meridian
- layering of relief
- cuesta
- Suspended solids
- limonite
- ferganite
- rock terrace
- soil subtype
- speciation
- descloizite