Sannadkii 1969-kii, shaqaalaha dhismaha ee Oklahoma, USA, ayaa helay qaab-dhismeed yaab leh oo u muuqday in uu yahay mid bini'aadam ah, sida ay qabaan qoraayaal badan, waxay awood u leeyihiin in ay dib u qoraan taariikhda Maraykanka oo kaliya laakiin sidoo kale taariikhda adduunka oo dhan.
Qaab dhismeedkan oo u eg sagxadda mosaic-ka dhagaxa ah, ayaa laga helay lakab ay khubarada takhasuska ahi aaminsan yihiin in uu soo taxnaa 200 oo kun oo sano. Isla mar ahaantaana, waxaa si weyn loo maleynayaa in bini'aadamka ugu horreeya ay yimaadeen Waqooyiga Ameerika kaliya 22-19 kun oo sano ka hor.
Wax yar ka dib markii la helay, maqaal ku saabsan helitaankan cajiibka ah ayaa lagu daabacay wargeyska "Oklahoma, " taasoo muran xooggan ka dhex dhalisay khubarada iyo akhristayaasha maalinlaha ah. Sheekadu waxay sidoo kale ku jirtay saddex sawir oo madow iyo caddaan ah "Mosaic", kuwaas oo weli ah sawirada kaliya ee ka badbaaday shaygan.
Waa tan waxa lagu qoray maqaalka wararka:
"Bishii Juun 27, 1969, shaqaaluhu waxay gooyeen dhagax ku yaal Broadway Extension ee 122nd Street, ee u dhaxaysa Edmond iyo Oklahoma City, waxay ku turunturoodeen helitaan taas oo keentay muran badan oo khubarada ah. …
Waxaan hubaa in ay ahayd mid bini’aadmigu sameeyay sababtoo ah dhagxaanta waxa loo habeeyey si kaamilaan ah oo xariijimo is-bar-bar socda ah oo is-dhex-galay si ay u sameeyaan qaab dheeman ah, dhammaantoodna waxay tilmaamayaan bari,” ayuu yidhi Durwood Pate, oo ah khabiir ku takhasusay cilmiga dhulka ee Oklahoma City oo arrintan si qoto dheer u daraaseeyay.
Waxaan sidoo kale helnay godka tiirka (tiirka) kaas oo si fiican u siman. Dhagaxyada sare ee dhagaxyadu aad bay u siman yihiin, haddii aad mid ka mid ah soo qaadatidna, waxaad ka helaysaa wax tilmaamaya daalka dushiisa. Wax walba si aad u wanaagsan ayaa loo meeleeyay si ay u noqdaan qaab dabiici ah. "
Dr. Robert Bell, oo ah khabiir ku takhasusay cilmiga qadiimiga ah ee Jaamacadda Oklahoma, ayaa is khilaafay, isaga oo ku andacoonaya in daahfurka uu ahaa qaab dabiici ah. Dr. Bell waxa uu sheegay in aanu helin wax calaamad ah wakiilka habaynta. Pate, dhinaca kale, wuxuu helay wax la mid ah grout - dareere cufan oo loo isticmaalo in lagu buuxiyo godadka dhismayaasha - inta u dhaxaysa dhagax kasta.
Qaab dhismeedka, oo la helay qiyaastii 90 sentimitir oo ka hooseeya dusha dhulka, wuxuu u muuqdaa inuu ka kooban yahay kun cagood oo laba jibbaaran, sida uu qabo Delbert Smith, cilmi-nafsiga, iyo madaxweynaha Shirkadda Oklahoma Seismograph, iyo madaxweynihii hore ee Oklahoma City Geophysical Society. “Shaki kuma jiro. Si cad ayaa loo dhigay, laakiin ma hayo wax fikrad ah cidda samayn karta. " ayuu u sheegay wariyaha.
Khubarada cilmiga dhulka Delbert Smith iyo Durwood Pate ayaa u safray goobta si ay u falanqeeyaan samaynta una soo ururiyaan muunado, sida uu sheegay wargaysku. "Waxaan ku qanacsanahay in tani aysan ahayn qaab dabiici ah oo dhulka ah, laakiin waa wax ay sameeyeen gacmaha bini'aadamka," Smith ayaa markii dambe yiri.
Laba maalmood ka dib, Juun 29, 1969, maqaal kale oo war ah oo arrintan ku saabsan ayaa ku soo baxay wargeyska "Tulsa World". Halkaa ereyada Delbert Smith ayaa si sax ah loo siiyay iyo shukaansiga shayga markii ugu horeysay:
"Taas shaki kuma jiro. Waxaa si gaar ah u rakibay qof, laakiin wax fikrad ah uma hayo cidda samaysay. "
"Waji kale oo qarsoodi ah ayaa la xidhiidha shukaansiga. Waxaa jira fikrado kala duwan oo ku saabsan juquraafiga ku lug leh, laakiin qiyaasaha ugu saxsan ee da'da taayiradan waa 200 kun oo sano. "
Baadhitaanku wuu sii socday. Helitaanka dalool labaad ee “Mosaic” waxaa lagu soo warramey The Oklahoman July 1, 1969. Marka loo eego natiijooyinka cabbirada, waxaa jira masaafo shan mitir ah oo u dhaxaysa labada godood. Sida laga soo xigtay Pate, dhagaxa loo isticmaalo in lagu abuuro mosaic waa isku-darka limestone Permian iyo miraha quartz.
3-dii Luulyo, wargeyska Oklahoman wuxuu sii waday baahinta daahfurka, isagoo tilmaamaya in sida laga soo xigtay warbixinnada cilmi-baarayaasha qadiimiga ah, "dube dhagax qadiimi ah" ayaa sidoo kale laga helay goobta.
"Sirta ah samaynta dhagaxa limestone ee dolomite ee laga helay inta u dhaxaysa Oklahoma City iyo Edmond waxaa uga sii daray Arbacadii markii la helay shay dubbe u eg oo goobta."
Cilmi-yaqaannada cilmiga dhulka oo fiiro gaar ah u yeeshay samaynta aan caadiga ahayn waxay ku adkaatay inay sharraxaan asalka samaynta ama farshaxanka. John M. Ware, oo ku takhasusay cilmiga dhulka ee magaalada Oklahoma, ayaa yidhi: "Kaliya laguma sharaxi karo dhinaca juquraafiga - waxaan u baahanahay khabiir qadiimiga ah si uu u bixiyo ra'yiga ugu dambeeya. Si kastaba ha ahaatee, da'deeda iyo asalkeeda ayaa laga yaabaa inay sii ahaato qarsoodi haddii cilmi-baaraha qadiimiga ah uusan awoodin inuu ku qanciyo inuu si dhaqso ah u qaado mashruuca."
“Muddo 20 maalmood gudahood ah, waxay dhisayaashu sii wadi doonaan hawshooda qodista dhulka, si ay u bilaabaan dhismaha bakhaarka cuntada. Muuqaalka kale ee xiisaha leh ee dhagaxa ayaa ah in uu ka kooban yahay sediments badda, taas oo muujinaysa in uu mar ahaan jiray sagxadda badda.
Pate ayaa intaas ku daray "Dhismaha 100-by-60-foot ayaa si degdeg ah u noqonaya soo jiidasho dalxiis."
“Dadku halkaas ayay ku soo qulqulayaan waxayna jeexjeexayaan qaybo dhagax ah. Waa inaan badbaadinaa ilaa inta wax laga qabanayo si loo go'aamiyo asalkiisa."
Nasiib darro, ku dhawaad xog yar oo dheeri ah oo ku saabsan daahfurkan yaabka leh ayaa laga soo sheegay warbaahinta Oklahoma intaas ka dib, waxa run ahaantii ku dhacay ilaa maanta ma cadda.
