In days gone by, earth was an inexpensive material for holding stone walls together. If built properly and protected from rain by a coping, they did their job. Various names for the technique in French.

https://fr.wikipedia.org/wiki/Hourdage

"En France, le mortier de terre a été appelé quelquefois mortier ordinaire ou bauge.
Dans le toulousain, en Camargue, dans la Crau, on l'appelait mortier d'agasse4, en référence à la pie bavarde, et en Périgord, mortier d'hirondelle, pour l'usage particulier de la terre qu'ont ces oiseaux dans la construction de leur nid.
Dans les pays industrialisés, il a été remplacé par le mortier de ciment à partir du XIXe siècle."
https://fr.wikipedia.org/wiki/Mortier_de_terre

The Wikipedia article on bauge here https://fr.wikipedia.org/wiki/Bauge
gives the following as English terms :

"clay dab, clay dabbin, clob, clom, cob, dab, daubin, dung wall, korb, mudwall, mud walling, puddled earth, tai clom, tai mwd, tai prid, witchert, wychert."

Of those, 'puddled earth' is the word I'm most familiar with, ahead of 'daub' which is Norfolk (a friend and neighbour had a fishing lake near here in Normandy, the track to which he often described as 'dauby'), and there is also 'rammed earth' which is a more recent term.

So I'd say "wall of stone and rammed/puddled earth" (probably no need to specify 'sandstone'; French has distinct words for grès, calcaire, etc., we have a prefix with 'stone', and that is really all that matters in such cases).




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Note added at 3 hrs (2024-04-10 12:17:33 GMT)
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@ Mpoma - Thanks for the vote of confidence (Discussion).