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关于海洋的英语文章

发表时间：2024-07-19 07:05:38 来源：网友投稿

Oceancoversalmostthreequarters(71%)ofthesurfaceoftheEarth,andnearlyhalfoftheworld'smarinewatersareover3000mdeep.Thisglobal,interconnectedbodyofsaltwater,calledtheWorldOcean,isgenerallydividedbythecontinentsandarchipelagosintothefollowingbodies,fromthelargesttothesmallest:thePacificOcean,theAtlanticOcean,theIndianOcean,theSouthernOcean,andtheArcticOcean.Thelastoneisoceanographicallybetterdescribedasamediterraneansea,however.Smallerregionsoftheoceansarecalledseas,gulfs,straitsandothernames.Geologically,anoceanisanareaofoceaniccrustcoveredbywater.OceaniccrustisthethinlayerofsolidifiedvolcanicbasaltthatcoverstheEarth'smantlewheretherearenocontinents.Fromthispointofview,therearethreeoceanstoday:theWorldOcean,andtheBlackandCaspianSeasthatwereformedbythecollisionofCimmeriawithLaurasia.TheMediterraneanSeaisverynearlyitsownocean,beingconnectedtotheWorldOceanthroughtheStraitofGibraltar,andindeedseveraltimesoverthelastfewmillionyearsmovementoftheAfricanContinenthasclosedthestraitoffentirely,makingtheMediterraneanafourthocean.(TheBlackSeaisconnectedtotheMediterraneanthroughtheBosporus,butthisisineffectanaturalcanalcutthroughcontinentalrocksome7000yearsago,ratherthanapieceofoceanicseafloorliketheStraitofGibraltar.)不好意思，只有这么长的，委屈你一下了

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