▁M 3 ▁motor way ▁was ▁proposed ▁but ▁after ▁much ▁protest ▁it ▁was ▁incorpor ated ▁into ▁the ▁scheme . ▁ ▁The ▁two ▁hal ves ▁of ▁the ▁parish ▁are ▁linked ▁by ▁Shaw ford ▁Down ▁which ▁runs ▁alongside ▁the ▁River ▁It chen . ▁However ▁they ▁are ▁now ▁symbol ically ▁separated ▁by ▁the ▁motor way ▁with ▁Com pton ▁on ▁its ▁west ▁side ▁and ▁Shaw ford ▁on ▁its ▁east . ▁ ▁Ge ology ▁The ▁parish ▁lies ▁on ▁the ▁Upper ▁C ret ace ous ▁ch alk ▁at ▁the ▁northern ▁edge ▁of ▁the ▁Ham pshire ▁Bas in , ▁di pping ▁south ▁from ▁the ▁Win chester ▁ant ic line , ▁with ▁success ively ▁younger ▁b eds ▁being ▁exposed ▁from ▁north ▁to ▁south . ▁In ▁the ▁north ▁the ▁Se af ord ▁Ch alk ▁formation ▁of ▁Sant onian ▁age ▁makes ▁up ▁Com pton ▁Down . ▁South ▁of ▁this ▁the ▁New h aven ▁Ch alk ▁out cro ps ▁in ▁the ▁dry ▁valley ▁running ▁down ▁from ▁Oliver ' s ▁B atter y ▁to ▁Shaw ford . ▁In ▁the ▁south ▁of ▁the ▁parish ▁the ▁C ul ver ▁Ch alk ▁of ▁Camp an ian ▁age ▁is ▁largely ▁over lain ▁by ▁a ▁layer ▁of ▁' cl ay - with - fl ints ' ▁weather ed ▁out ▁of ▁the ▁ch alk . ▁In ▁the ▁east ▁the ▁ch alk ▁is ▁cut ▁through ▁by ▁the ▁It chen ▁valley ▁and ▁over lain ▁by ▁cal care ous ▁t uf a . ▁ ▁A ▁feature ▁of ▁the ▁ge ology ▁is ▁the ▁hill ▁immediately ▁south west ▁of ▁the ▁village ▁of ▁Shaw ford ▁known ▁as ▁Shaw