KwiGulf yaseBothnia

IBotnia

El KwiGulf yaseBothnia Umsantsa ophakathi kwentshona yeFinland nempuma yeSweden. Umphezulu wayo uyi-116.300 km², ingama-725 km ubude, phakathi kwe-80 kunye ne-240 yeekhilomitha ububanzi kunye ne-avareji yobunzulu be-60 m, ubuninzi bayo bungama-295. Yeyona ngalo isemantla yoLwandle lweBaltic. Amanzi ayo aphantsi, ayabanda kakhulu, elona candelo lisemantla lihlala limile okomkhenkce iinyanga ezintlanu ngonyaka, kwaye linetyuwa encinci, kwaye iintlobo ngeentlobo zeentlanzi zamanzi amnandi zinokuhlala nasemanzini.

IBotnia kukudibanisa ulwimi lwakudala lwesiNorse expression expression, okuthetha "okuphantsi." Igama le-botn lasetyenziswa kwi-gulf njenge-Helsingjabotn kulwimi lwakudala lwaseNorse, ngokuchaseneyo neHälsingland, igama elo lalinikezelwe kummandla wonxweme osentshona we-gulf. Emva koko, i-botten yafakwa kwiingingqi ze-Västerbotten kwicala lasentshona kunye ne-Österbotten kwicala lasempuma ("East East" kunye ne "West Bottom"). Igama lesiFinnish Österbotten, Pohjanmaa, okanye "Pohja" -land, linika umkhondo kwintsingiselo yalo kuzo zombini iilwimi: pohja lithetha "isezantsi" kunye "neMantla" ngaxeshanye.

IGulf of Bothnia, kunye noLwandle lweBaltic, yinxalenye yezo zangaphambili, de kwaba yiPleistocene, yakha ithafa elibanzi lomlambo woMlambo i-Eridanos. Lo mlambo wavela kwingingqi yeLapland, wadlula kuloo ndawo ngoku iyiGulf yaseBothnia, kwaye wathululela kuLwandle lwaseMantla wenza i-delta enkulu kakhulu.

Ukusuka kwiPleistocene kwakukho iziqendu ezininzi zomkhenkce apho loo ndawo yatshona khona ngaphantsi komphakamo wolwandle ngenxa yobunzima bomkhenkce. Oku kwenzeka malunga neminyaka engama-700.000 eyadlulayo. Ukusukela ngoko ukuya phambili, iimpawu ezichonge ukuba yintoni le gulf yangoku yenziwe bubunzima beqhwa elalitshona kulo mmandla kunye nohlengahlengiso olulandelayo lwe-isostatic.


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