Iliso lentlango yaseSahara

sahara desert iliso

Siyazi ukuba iplanethi yethu igcwele izinto ezinomdla kunye neendawo ezingaphaya kwentsomi. Enye yeendawo ezitsalela ingqalelo kakhulu kwizazinzulu yi sahara desert iliso. Yindawo esembindini wentlango enokubonwa emajukujukwini ngokumila kweliso.

Kweli nqaku siza kukuxelela yonke into eyaziwayo malunga neliso lentlango yaseSahara, imvelaphi yayo kunye neempawu.

Iliso lentlango yeSahara

sahara desert iliso esibhakabhakeni

Eyaziwayo kwihlabathi jikelele njenge "Iso le-Sahara" okanye "Iliso leNkunzi", isakhiwo seRichat siyindawo enomdla efumaneka kwintlango yaseSahara kufuphi nesixeko sase-Udane, eMauritania, eAfrika. Ukucacisa, imilo "yeliso" inokuthakazelelwa ngokupheleleyo ukusuka kwindawo.

Isakhiwo esiziikhilomitha ezingama-50 sobubanzi, esenziwe ngemigca emile okwengqukuva, safunyanwa ngehlobo lika-1965 ngoosomajukujuku beNASA uJames McDivit no-Edward White ngexesha lothumo lwasemajukujukwini olubizwa ngokuba yiGemini 4.

Imvelaphi yeLiso leSahara ayiqinisekanga. I-hypothesis yokuqala yacebisa ukuba kungenxa yempembelelo ye-meteorite, eya kuchaza ukumila kwayo kwisetyhula. Nangona kunjalo, uphando lwakutsha nje lucebisa ukuba inokuba sisakhiwo esilinganayo sedome ye-anticlinal eyenziwe lukhukuliseko kwizigidi zeminyaka.

Iliso leSahara likhethekile kwihlabathi kuba liphakathi entlango kungekho nto liyijikelezileyo.Embindini weliso kukho amatye eProterozoic (ukusuka kwi-2.500 yezigidigidi ukuya kwi-542 yezigidi zeminyaka eyadlulayo). Ngaphandle kwesakhiwo, amatye aqala kwixesha le-Ordovician (eyaqala malunga ne-485 yezigidi zeminyaka eyadlulayo kwaye iphele malunga ne-444 yezigidi zeminyaka eyadlulayo).

Olona kwakheka luncinci lukwindawo ekude kakhulu, ngelixa eyona ndlela indala isembindini wedome. Kuwo wonke lo mmandla kukho iindidi ezininzi zamatye afana ne-volcanic rhyolite, i-igneous rock, i-carbonatite kunye ne-kimberlite.

Imvelaphi yeliso ukusuka kwintlango yeSahara

iimfihlakalo zaseSahara

Iliso leSahara lijonge ngqo esithubeni. Inobubanzi obuziimitha ezingama-50.000 kwaye iingcali zejografi kunye nezazi ngeenkwenkwezi ziyavuma ukuba "yinto engaqhelekanga" yokwakheka komhlaba. Ezinye izazinzulu zikholelwa ukuba yenziwa emva kokuntlitheka kweasteroid enkulu. Noko ke, abanye bakholelwa ukuba inento yokwenza nokukhukuliseka kwesibhakabhaka ngumoya.

Ifumaneka kumntla-ntshona weMauritania, ekupheleni kwentshona yeAfrika, into engakholelekiyo ngokwenene kukuba inezangqa ezixineneyo ngaphakathi. Ukuza kuthi ga ngoku, oku kuyaziwa malunga ne-crustal anomalies.

Umjikelo weLiso leSahara kukho amarhe okuphawula umkhondo wesixeko sakudala esasilahlekile. Abanye, benyanisekile kwithiyori yeyelenqe, bayangqina ukuba iyinxalenye yesakhiwo esikhulu sangaphandle komhlaba. Xa kungekho bungqina bubambekayo, zonke ezi ngqikelelo zithotyelwe kwindawo yengqikelelo ye-pseudoscientific.

Enyanisweni, igama elisemthethweni lale fomu yomhlaba "yi-Richat Structure". Ubukho bayo bubhalwe ukususela ngo-1960, xa i-NASA Gemini expedition astronauts yayisebenzisa njengendawo yokubhekisela. Ngelo xesha, kwakucingwa ukuba yimveliso yempembelelo enkulu ye-asteroid.

Namhlanje, nangona kunjalo, sinenye idatha: "Isici esisetyhula sokwakheka komhlaba kukholelwa ukuba sisiphumo sedome ephakanyisiweyo (ehlelwa zizazinzulu zejoloji njenge-anticline ephahleni) ethe yakhukuliseka, yabonisa ukumila kwamatye athe tyaba," yabhala i-arhente yasesibhakabhakeni efanayo. Iisampulu zentlenga kwindawo ibonisa ukuba yabakho malunga nezigidi ezingama-542 kwiminyaka eyadlulayo. Ngokutsho kwe-IFL Science, oku kuya kuyibeka kwixesha le-Proterozoic Late, xa inkqubo ebizwa ngokuba yi-folding yenzeke apho "i-tectonic forces icinezele ilitye le-sedimentary." Ngaloo ndlela i-anticline ye-symmetrical yenziwa, iyenza ibe ngqukuva.

Ivela phi imibala yezakhiwo?

indawo engaqhelekanga yokwakheka komhlaba

Iliso leSahara lifundwe ngokubanzi ngamasebe ahlukeneyo esayensi. Enyanisweni, uphando lwe-2014 olupapashwe kwi-African Journal of Geosciences lubonise ukuba Isakhiwo seRichat asiyomveliso yeetectonics zeplate. Endaweni yoko, abaphandi bakholelwa ukuba idome yatyhalelwa phezulu bubukho belitye elinyibilikayo lentaba-mlilo.

Izazinzulu zichaza ukuba ngaphambi kokuba ukhukuliseke, izazinge ezibonakala kumphezulu namhlanje zazisenziwa. Ngenxa yobudala besangqa, inokuba yimveliso yokuqhekeka kwePangea: i-supercontinent eyakhokelela ekuhanjisweni kwangoku koMhlaba.

Ngokuphathelele iipatheni zombala ezinokubonwa kumphezulu wesakhiwo, abaphandi bayavuma ukuba oku kuhambelana nohlobo lwamatye oluvela kukhukuliseko. Phakathi kwabo, i-rhyolite ecocekileyo kunye ne-coarse-grained gabbro ivelele, eye yafumana ukuguqulwa kwe-hydrothermal. Ngoko ke, Iliso leSahara alinayo "iris" edibeneyo.

Kutheni inxulunyaniswa nesixeko esilahlekileyo saseAtlantis?

Esi siqithi sasentsomini sibonakala kwimibhalo yesithandi sobulumko esidumileyo samaGrike uPlato kwaye sichazwa njengamandla angenakulinganiswa omkhosi awayekho kumawaka eminyaka ngaphambi kobukho bukaSolon, ummisi-mthetho waseAthene, ngokutsho kwesi sithandi sobulumko uSolon ungumthombo wembali.

Ukuqwalasela imibhalo kaPlato ngalo mbandela, Akumangalisi ukuba abaninzi bakholelwa ukuba eli "liso" livela kwelinye ihlabathi kwaye inokuba nento yokwenza kunye nokuphela kwezigidi ze-Atlanteans. Esinye sezizathu zokuba iliso lingafunyaniswanga ixesha elide kukuba likweyona ndawo imbi kakhulu emhlabeni.

Njengoko i-epic kwaye imangalisa njengoko inkcazo kaPlato ye-Atlantis yayinjalo, abaninzi bakholelwa ukuba wayezikrwempa kuphela. UPlato uchaze iAtlantis njengezangqa ezinkulu ezitshintshana phakathi komhlaba namanzi, ezifana ne "Iso leSahara" esiyibonayo namhlanje. Oku bekuya kuba yimpucuko ecebileyo ye-utopian eyabeka isiseko somzekelo wase-Athene wedemokhrasi, uluntu olutyebileyo ngegolide, isilivere, ubhedu, kunye nezinye iintsimbi ezixabisekileyo kunye namatye anqabileyo.

Umkhokeli wabo, IAtlantis, wayeya kuba yinkokeli yezemfundo, izakhiwo, ezolimo, iteknoloji, ukuhlukahluka kunye nokuxhotyiswa ngokomoya, amandla akhe omkhosi wamanzi kunye nomkhosi ayengenakulinganiswa kule miba, i-Atlantis Kings ilawula ngokugunyazwa ngokugqithiseleyo.

Ndiyathemba ukuba ngolu lwazi unokufunda ngakumbi malunga neliso lentlango yeSahara kunye neempawu zayo.


Yiba ngowokuqala ukuphawula

Shiya uluvo lwakho

Idilesi yakho ye email aziyi kupapashwa. ezidingekayo ziphawulwe *

*

*

  1. Uxanduva lwedatha: UMiguel Ángel Gatón
  2. Injongo yedatha: Ulawulo lwe-SPAM, ulawulo lwezimvo.
  3. Umthetho: Imvume yakho
  4. Unxibelelwano lwedatha: Idatha ayizukuhanjiswa kubantu besithathu ngaphandle koxanduva lomthetho.
  5. Ukugcinwa kweenkcukacha
  6. Amalungelo: Ngalo naliphi na ixesha unganciphisa, uphinde uphinde ucime ulwazi lwakho.