laguna dell hungo roopeekaranam

arjanteenayile central paattagoniyayile kanaadon asphalto thadatthinte praadeshikavalkkaricha aadyakaala eosene (salma vargeekaranathile itaboriyan) phosilphorus bhoomishaasthraparamaaya roopeekaranamaanu laguna dell hungo formation allengil laguna dell hungo tuff (). kattiyulla roopeekaranathil gartha thadaaka parithasthithiyil nikshepikkappetta tafeshyas chelikkallukalum manalkkallukalum vadakkupadinjaaran chubut pravishyayile laguna dell hangoyil vilakal ulppedunnu.
roopeekaranathinte tuffukalile sanidine paralukale adisthaanamaakki 52.22 ± 0.22 Ma ennathinaanu eee roopeekaranam krithyamaayi nischayichirikkunnathu. laguna dell hungo roopeekaranam barda kolarada ignimbraittinu mukalilaanu, ithu sarmiyanto groupinaal moodappettirikkunnu. lokamembaadum kaanapedunna ettavum pazhaya "yookkaaliptas" fossilukal ulppedunna, sammishra thekke american kudumbangaludeyum nilavil savisheshamaaya australian sasyajaalangaludeyum asaadhaaranamaaya sambannamaaya phoosil sasyajaalangalude shekharathinte samrakshanathinu eee yoonit prashasthamaan. eee roopeekaranam praanikalude muttakal, "bachmania chubutensis" enna phoosil malsyam, thavala "shelania paskuwali" ennivayulppede niravadhi phoosil praanikal nalkiyittundu. agniparvvatha gartha thadaakatthile idaykkide vathaka pottitheri pettennulla maranathinum pushpangaludeyum janthujaalangaludeyum samyojanathinte samrakshanathinum kaaranamaayathaayi karuthappedunnu.
vivaranam.
chubut pravishyayile marubhoomi kulamaaya laguna dell hangoyude ("reeds thadaakam") perilulla laguna dell hungo roopeekaranam praadhamikavum punarnirmmichathumaaya ashfal paalikal ulla tafeshyas manalkkallukalum chelikkallukalum ulkkollunna oru praadeshika avashishta yoonittaan. oru gartha thadaaka anthareekshathilaanu eee roopeekaranam nikshepichathu. padinjaaran kanaadon asphalto thadatthile madhya chubat nadeethadatthile agniparvvatha pyroclastic samuchayathinte bhagamaanu ekadesham kattiyulla roopeekaranam. niravadhi dasalaksham varshangalilayi nikshepikkappetta vividha agniparvvatha plaastik, nuzhanjukayatta, pyroclastic, puramthallal parakal enniva eee samuchayathil ulppedunnu. agniparvvathangal, thazhikakkudangal, laavayude ozhukk, kazhuthu, nuzhanjukayatangal, tuffukal, agniparvvatha plaastik nikshepangal (pradhaanamaayum lacastrine uthbhavam) thudangiya vaividhyamaarnna agniparvvatha vasthukkal eee samuchayathinte savisheshathayaanu, avayellaam idaykkide parasparam bandhippichirikkunnu.
laguna dell hungo roopeekaranam munbu hutrera roopeekaranathil ulppeduthiyirunnu, ithu barda kolarada ignimbraittinu mukalilaanu, koodaathe sarmiyanto grouppaanu ithu pothinjirikkunnathu. aashh bedsinte sanidine paralukalekkurichulla paralukalekkurichulla vishakalanam upayogichu 52.22 ± 0.22 ema vare roopeekaranam theeyathi nischayichittundu, ithu nikshepangale aadyakaala eoseenil allengil itaboriyan salma vargeekaranathil sthaapikkunnu.
paleantological praadhaanyam.
roopeekaranathinte paleophlora lokamembaadumulla ettavum jaivavaividhyam niranja senosoic phoosil nikshepangalilonnaayi kanakkaakkappedunnu. fernukal, coniferukal, poochedikal ennivayude asaadhaaranamaaya sambannamaaya koottangal chernnathaanu biota, avayil palathum ithuvare aupachaarikamaayi vivarichittilla. vivarichittilla muthal padicha eee roopeekaranathinte sasyajaalangal praayatthil mayoseen aanennu munbu karuthappettirunnu.
kaswarinesi kudumbatthile "jimnostoma" janussile vivaricha moonnu enangalum kunoniasee kudumbatthile "serattopettalam edgardoromeroi" inavum australiyaykku purathu kaanapedunna eee kudumbangalile oreyoru amgangalaanu. aadyakaala eosene kalavastha opttimalil (ikko) nikshepikkappetta oru thadaakatheera sasyajaalathe pushpasankaram prathinidheekarikkunnuvennu karuthappedunnu, sharashari vaarshika thapanilayum vaarshika mazhayum kanakkaakkappedunnu. laguna dell hangoyile gartha thadaakathil aavarthichulla vathaka pottitheri orupakshe roopeekaranathil kaanapedunna sasyajanthujaalangalude pettennulla maranathilekku nayichu.
paleobiota.
roopeekaranathil ninnu inipparayunna phoosil sasyangaleyum mrugangaleyum vivarichittundu

