In geology and geomorphology a paleosurface is a surface made by erosion of considerable antiquity.
[1] Irregular paleosurfaces, albeit usually smaller than flat ones, occur across the globe,[1] one example being the Sudetes etchsurfaces.
[2] In the case of peneplains it is argued that they become paleosurfaces once they are detached from the base level they grade to.
Geologists look into the endogenic or constructive processes occurring to create that surface, such as crustal uplift and igneous activity.
The stratigraphic record is valued by geologists allowing for a broader range of surface types to be considered.