What is this geomorphological form?
There are a couple of possibilities, depending on what you're paying the most attention to.  This falls in an overlap area of terms that vary from region to region and even from person to person. 

The key thing to notice in your photo is the whitish band running along the top of the escarpment that borders your landform.  This shows that it's held up by a resistant, mostly horizontal, layer of sedimentary rock.

This French page refers to it as a cuesta; this is plausible, but the strata underlying cuestas usually slope more than what appears in your picture.  



(generalized cuesta image from Wikipedia)

"Plateau" is also plausible, but this is not very specific. The landform in your picture doesn't have quite the extent of the Colorado Plateau. 

Tableland or table is probably the most generic name for the entire regional structure under the rock layer. 

If you are talking about the remnant under the pin in your image (and especially if this were in America),  then we'd have no trouble calling it a mesa or even a  butte. 



(Wikipedia image of a mesa in Monument Valley)