Ukucabanga ngesifunda sasePatagonian sanamuhla njengolwandle olukhulu lwamanzi afudumele agcwele izinto eziphilayo kubonakala sengathi kuyinto evela encwadini yesayensi eqanjiwe, kodwa isayensi isanda kunikeza ubufakazi obungenakuphikwa balesi sikhathi sasemanzini. Ithimba lochwepheshe abavela ePatagonian Institute of Geology and Paleontology lifinyelele ingqophamlando engakaze ibonwe ngokubhala phansi izinhlobo ezintsha zeminenke yasolwandle eyayihlala kulesi sifunda eminyakeni eyizigidi edlule. Lokhu kutholwa akugcini nje ngokwandisa ikhathalogi yezinto eziphilayo yale ndawo, kodwa futhi kugcizelela ukuceba okufihliwe ezingcezu ze-Gaiman Formation, esifundazweni saseChubut, lapho izinsalela zezinto eziphilayo ezincane zazingabonakali khona phakathi kwamathambo amakhulu emikhomo.
Ucwaningo, oluye lwadinga isineke esingenamkhawulo kanye nemikhankaso eminingana yokumba, luvumele ukuhlonza amaqembu ahlukene angama-27 e-taxonomic, okusho ukuthi irekhodi eliphindwe kabili lezinto eziphilayo kwezilwane ezingenamgogodla ezaziwa ngaphambili kule ndawo. Phakathi kwenhlanganisela yezinsalela zamathambo ezitholakale enhlabathini emhlophe kaBryn Gwyn, inhlanzi encane, ebizwa ngokwesayensi ngokuthi iBuccinanops halleri, ivelele. Lokhu kutholwa kuyindaba ebuhlungu emphakathini wesayensi, njengoba kubavumela ukuthi balandelele imvelaphi yozalo olungabonakala ogwini lwasePuerto Madryn namuhla, yize okhokho bayo bebadala kakhulu kunalokho okwakucatshangwa ekuqaleni.
Ukutholwa okuchaza kabusha iMiocene Yasekuqaleni
Isampula okukhulunywa ngayo, i-Buccinanops halleri, ikhombisa izici eziningana zesimo semvelo ezenza ihluke kakhulu kunezihlobo zayo zanamuhla. Abacwaningi babone i- imihlobiso esekelwe emigqeni eyindilinga Igobolondo layo, elingekho ezinhlotsheni zamanje, lasebenza njengenkomba eqinisekisa ukuthi kwakuyinhlobo engaziwa yisayensi. Isici esimangalisayo kakhulu saleli cala ukuthi la mathambo atholakala ezinhlakeni zeMiocene, okwabeka ukuphila kwawo phakathi kweminyaka eyizigidi ezingu-15 nezingu-16, okumelela irekhodi lokuqala laleli qembu lezinkonkoni ezidla inyama eNingizimu Yenkabazwe.
Umsebenzi wasensimini awuzange ube lula kangako, njengoba ososayensi be-IPGP-CONICET bachitha iminyaka emine, phakathi kuka-2021 no-2024, behlola indawo ukuze baqoqe izinto. Ngaphezu kwezinkonkoni ezishiwo ngenhla, ithimba eliholwa nguDamián Pérez lithole lokhu ukuba khona kwama-brachiopods nama-scaphopodsAmaqembu amabili ezilwane ezingenamgogodla ezazingaziwa nhlobo ngaphambilini kulezi zigaba zejiyoloji atholakele. Ngenxa yalokhu kuhlanganiswa kwedatha entsha, manje kungenzeka ukuhlanganisa iphazili enemininingwane eminingi yokuthi amanethiwekhi emvelo ayesebenza kanjani kulezo zilwandle zasendulo, okwakuthakazelisa ukuthi zazifudumele kakhulu kunoLwandle lwase-Argentina lwamanje.
Isayensi enegama layo kanye nombono wesikhathi esizayo
Ngaphandle kwenani layo lezinto eziphilayo, lokhu okutholiwe kunengxenye enamandla kakhulu yemizwa kubacwaningi bendawo. Igama eliqondile lohlobo olusha, i-halleri, linikezwe njenge- isikhumbuzo sokuhlonipha isazi se-geology uMiguel Haller ngemva kokufaUmuntu obalulekile owaba ngowokuqala ukuchaza ngokwezemfundo i-Gaiman Formation. Ngale ndlela, ozakwabo baye bafuna ukugcwalisa ifa lakhe ezweni asize ukulihlukanisa emashumini eminyaka edlule, bexhumanisa igama lakhe nomlando wokuziphendukela kwemvelo wasePatagonia.
Ukubaluleka kukaBryn Gwyn, ogama lakhe lesiWales lisho "igquma elimhlophe," kusekukwazini kwakhe ukusebenza njengefasitela lesikhathi esidlule ngenxa yenhlabathi yayo ecebile ngomlotha wentaba-mlilo. Ukuhlaziya kusikisela ukuthi le ndawo yabelana ngezimo zemvelo nezinye izingxenye ze-Argentina yanamuhla, njengeSanta Cruz, ngenxa ye- umcimbi omkhulu wokweqa umthetho wasolwandle okwakhukhula isifunda esisempumalanga. Lesi simo somhlaba wonke savumela izilwane zasolwandle ukuthi zande kakhulu, sashiya indawo yokungcwaba yamathambo esivumela namuhla ukuthi siqonde kangcono imiphumela yokushintsha kwesimo sezulu kanye nokuvela kwezinhlobo ezindaweni ezishintshayo.
Lokhu kuthuthuka kwesayensi kuphawula iphuzu lokuguquka ekuqondeni ukwakheka kwezilwane ezihlala ogwini lwasePatagonia namuhla, kwakha ukuxhumana okuqondile phakathi kwesikhathi esidlule esikude nesikhathi samanje. Ngokutadisha ngokucophelela lezi zilwane ezingenamgogodla, kuye kwenzeka ukuthi ukwakha kabusha yonke imvelo yasolwandle Lokhu okutholwe, okwakuyizinto eziqagelayo nje, sekukufakazele ukuthi ngisho nezinto eziphilayo ezincane kakhulu zinezindaba ezithakazelisayo zokuzilandisa. Umsebenzi ohlanganisiwe wezazi ze-geology kanye nezazi ze-paleontologists uyaqhubeka nokuthela izithelo, usikhumbuza ukuthi izimfihlo zeminyaka eyizigidi edlule zisafihliwe ngaphansi kwezinyawo zethu, zilinde ukudalulwa nokuqedwa kwemephu yokuphila emhlabeni wethu.