I-hadic eon, ekwabizwa ngokuba yihadan okanye hadan, lelona xesha lidala eMhlabeni. Uyayiqonda ukusuka ekubunjweni koMhlaba malunga ne-4.550 yezigidigidi zeminyaka eyadlulayo ukuya kwi-4.000 / 3.800 yezigidigidi zeminyaka eyadlulayo. Ixesha alichanekanga ncam, kodwa lithe alikho sesikweni ngenxa yokuba le mida ayimiselwanga ngokusemthethweni okanye ayamkelwa ngokusemthethweni. Ikhomishini ephetheyo yokuseka imida kunye nokufunda ngetratigraphy, geology kunye geochronology kwihlabathi liphela IKhomishini yeHlabathi kwiStratigraphy.
USupereon | Ewe | Izigidi zeminyaka |
---|---|---|
I-Precambrian | Proterozoic | 2.500 i540 |
I-Precambrian | Zakudala | 3.800 i2.500 |
I-Precambrian | Hadic | 4.550 ukuya ku-3.800 XNUMX |
Eli xesha, elingaziwa, kwangaxeshanye indawo yokuqala kwiplanethi yethu. Kuqikelelwa ukuba yonke inkqubo yelanga inokuba yenzeka phakathi kwilifu elikhulu legesi nothuli. I-haic aeon ikwalixesha apho Umhlaba uphantsi kotshintsho olukhulu. Ngenxa yokuqhuma okukhulu kwentaba-mlilo, kunye nexesha apho uMhlaba kunye neeplanethi ezininzi zangaphakathi zenkqubo yelanga, zifumene iimpembelelo ezinkulu kwii-asteroid ezinkulu. Enye yazo yayiyiNyanga ngokuchasene noMhlaba (esithethe ngayo kutshanje, kwi Iminqweno yoMhlaba, inqaku 5).
Ubungqina beHadic Aeon
Ukukhangela amatye amadala, siya eGreenland, eCanada nase-Australia. Baneminyaka engama-4.400 bhiliyoni ubudala. Amatye e-Hadic, afunyenwe kumashumi eminyaka adlulileyo kwinkulungwane ye-XNUMX, zizimbiwa ze-zircon ze-crystal. Nangona ezona zimbiwa zindala zaziwayo, kwaye zifihla nzulu zibekwe phantsi kwentlenge kwintshona yeKhanada nakwingingqi yeJack Hills kwintshona yeAustralia, ayizizo ezamatye.
Elona litye lidala ezaziwa ngumhla ukusuka kwixesha elidlulileyo I-3.800 yezigidi zeminyaka. Eyona indala indala iseGreenland, eyaziwa njenge "Ibhanti ye-Isua". Zitshintshiwe ngandlel 'ithile ziintaba-mlilo ezangena ematyeni emva kokufakwa kwazo. Kwincwadi "Iingcamango malunga nemvelaphi yobomi" ngu-Diego Sebastián González kunye noMaricel Ciela Gutiérrez siyifumana, kunye nedatha yobuchwephesha kodwa yomlingo, omnye wemibuzo ebesoloko sizibuza yona. Buqala phi ubomi? Kwaye nantso ke, ubungqina bokuqala bokuqala, kwibhanti ye-Isua, kwiHadic Aeon.
Imvelaphi yoBomi eMhlabeni
Izidumbu zeGreenland ziqulathe ukubunjwa kwentsimbi eboshiweyo. Kuqala bekukholelwa ukuba zinekhabhoni ephilayo, eya kubonisa ukuba iimolekyuli zokuqala eziziphindayo zaqala ukubakho. Ngoku kukho ubungqina bokuqala bokuba ubomi buvela kwibhanti ye-Isua supracortical, ukusuka eNtshona Greenland, nakwiiAkilia Islands, ezivela kwakule ndawo. Kuya kufuneka kukhunjulwe ukuba, nangona ubungqina benzululwazi bufunyenwe kuloo ndawo, asinakho ukubuchaza ngaphambili. Khumbula ukuba uMhlaba, awuzange wenziwe nje, kodwa emva kokumiswa phantse, intshukumo yamacwecwe elizwekazi ayaqhubeka.
Ulwakhiwo lwamatye alwenzileyo lunoxinzelelo lwe -5,5 yeCarbon (C) 13, C13. Oku kungenxa yendawo esingqongileyo ekhetha ukukhanya kwe-C12 isotope. I-C13 kwi-biomass, inika ingxinano ka -20 kunye -30, isezantsi kakhulu kunemilinganiselo efumaneka kumatye. Ukusuka kwezi ndlela kucingelwa ukuba ubomi kwiplanethi yethu bunokuqala 3.850 yezigidi ezidlulileyo iminyaka, ekupheleni kwe-Hadic eon.
Ukuqala kwamanzi
Kuqwalaselwa ukuba phakathi kwamasuntswana umhlaba owenziwe ngawo, kufanele ukuba bekukho umlinganiselo othile wamanzi. Ezi molekyuli bekungafanelekanga ukuba ziyekelele kumandla omxhuzulane, kwaye zisuka embindini, zahlala ngaphezulu. Emva kokuba iplanethi ifikelele kwi-40% yobume bayoEzi molekyuli zamanzi, kunye nezinye ezinokuguquguquka okuphezulu, kufuneka ukuba sele zifunyenwe ngaphezulu, kumanani amakhulu kakhulu sele ekho. Ukunqongophala kweegesi ezininzi ezintle ekufuneka zibalekile, ezinjenge-helium okanye i-hydrogen, kuyamangalisa. Oku kukhokelele kwinkolelo yokuba kumele ukuba kwenzeke into eyintlekele kwimeko yokuqala. Phakathi kweengcinga, sinayo ithiyori kaThiya, esixoxe ngayo kuloo nto Inqaku lokugqibela (inqaku 5), Ndicacisile ukuba kutheni iNyanga ikho ngoluhlobo.
Impembelelo yayo ebomini
Iingcebiso zendlela amanzi asebenze ngayo njengesixhobo sokunxibelelana zanikwa nguLazcano kunye noMiller ngo-1994. Bacacisa ukuba le linki iya kunikezelwa kukujikeleza kwamanzi ngokusebenzisa i-fumaroles yolwandle. Ixesha elipheleleyo lokuphinda ujikeleze liza kuhlala iminyaka eyi-10 yezigidi, kodwa nayiphi na into eyindalo inokutshatyalaliswa kumaqondo obushushu angaphezu kwe-300ºC Ke, emva kokuphola ngokuthe ngcembe, Umzimba wamandulo I-DNA-protein heterotroph ene-genome ye-100 kilobases, kungathatha malunga ne-7 yezigidi zeminyaka ukuba ivele kwi-cyanobacterial genome ene-7.000 yemfuza.
Kwaye kukho into esingayithethanga, ukuba ngenye imini uyakufumana impendulo. Namhlanje isengumbuzo omkhulu ekufuneka uphendulwe. Ubomi, ngokwazi, bunokubakho kuphela ngendlela yekhabhoni okanye yesilicon. Kwiplanethi yethu, ikhona njengekhabhon, hayi i-silicon, ngubani owaziyo ukuba ikho kwenye indawo. Kodwa owona mbuzo ngowokuba, buya kukhula njani ubomi ukuba amathuba okwenzeka oko ebengekho?
Akunakuphepheka ukuba ukuba sicinga ngayo ebusuku, sijonga phezulu ezinkwenkwezini. Ukuzivumela ukuba sihlaselwe ziingcinga ezinkulu ezivela.
Emva kwe-Hadic eon, i I-archaic eon. Ukuba unomdla wokwazi ukuba iqhubeke njani, cofa apha.