#structural basin
- Almas-Agrij — The name of a complex landform unit in northwestern Transylvania (Romania), representing the Almaș-Agrij Depression or the depressional sector bounded by the valleys of the Almaș and Agrij rivers in Sălaj County. This contact zone between the Apuseni Mountains and the Someșan Plateau is recognized for its hilly landscape, dense hydrographic network, and Roman and medieval historical remains.
- Argeșel — The name of a river in southern Romania, a left tributary of the Dâmbovița River, which originates in the Făgăraș Mountains and flows through Argeș County. Structurally, the term represents a hydronymic diminutive form derived from the Argeș River, also identifying the local village of Argeșelu in the aforementioned county, a microregion historically recognized for its picturesque rural settlements and well-developed hydrographic network.