Fyord ewbaya hir ha kul gen tenwednow pur serth, gwres genrewliv. Furvyes enjei pan wrelho rewliv usyanans U dre'n processys adhestryppya haskravinas. Ma dhe'n rewliv gordhownnhes an nans kensrewlivek rag gara nans U pur dhown. Woja rewlivans ma level an mor ow terevel dhe veudhi an fyord.
En pedn an fyord ryb an mor ma treudhow lebmath ew an nans bassa (le down). Mars uji level an treudhow a-ugh level an mor, lydn dowr fresk ew an sewyans.
WojaOos an Rew, ma teudhans an rew ow hwarvos war-barth ha derevyans en level an tir. Ma le a boos war an tir woja teudhans an rew hag usuyans radn a'n godhas. Hanow an process ma ewisostasi. Terweythyow derevyans an tir drefen isostasi ew moy ages derevyans en level an mor. An brassa radn a fyordow ew downna ages an mor en ogas: ma dhe Sognefjord enNorgagh downder a 1,300m en-dadn level an mor. Dell ew usys makrib gwres agarrek weli ogas dh'y aber drefen bos le a usyans gen an rewliv ena po bos godhasa pednmarian ena. Ma an treudhow ma ow kawsya frosow ha trobollow, pekar ha Saltstraumen en Norgagh.
Nag ew fyord an keth tra hamorval. Fyord ew tirfurv rewlivek, gwres der usyans ha derevyans en level an mor. Morval ew tirvurv gwres dre dherevyans en level an mor hepken.
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