Kammala jumla mai zuwa: Spit wani sabon abu ne a cikin yanayin ilimin ƙasa, kuma a cikin 'yan shekarun nan an shimfiɗa shi zuwa yamma da ƙasa ta hanyar tasirin ruwa da guguwa. An yi imanin cewa an ƙara samun wannan ci gaban ne ta wurin yin amfani da ruwan gishiri da ke wannan bakin tekun a ƙarni na baya bayan nan, wanda ya kawar da wani abu da ke hana shinge yin motsi. Adadin shingle da guguwa guda ɗaya ta motsa na iya zama "mai ban mamaki"; wani lokacin ana iya karya tsutsa, ya zama tsibiri na ɗan lokaci, kuma wannan na iya sake faruwa. An rasa ɓangaren arewacin ƙauyen Snitterley (yanzu Blakeney) zuwa teku a farkon Zamanin Zamani, mai yiwuwa saboda guguwa. A cikin shekaru ɗari biyu da suka gabata, taswirori sun kasance daidai don auna nesa daga rushewar Blakeney Chapel zuwa teku. Mita 400 (440 yd) a 1817 ya zama 320 m (350 yd) ta 1835, 275 m (300 yd) a 1907, kuma 195 m (215 yd) a ƙarshen karni na 20. Gishiri yana motsawa zuwa gabar ƙasa a kusan 1 m (1 yd) a kowace shekara; kuma da yawa tsoffin tsibiran da aka ɗaga ko "idanu" sun riga sun ɓace, da farko shingle mai ci gaba ya rufe su, sannan kuma ya ɓace cikin teku. Ƙasar mai girma
Ambaliyar ruwa ta 1953 ta mamaye babban rairayin bakin teku, kuma kawai mafi girman dunes sun kasance sama da ruwa. An wanke yashi a cikin salt marshes, kuma an keta ƙarshen ƙarshen, amma kamar yadda yake tare da sauran sassan halitta na bakin teku, kamar Scolt Head Island, an yi mummunan lalacewa.