KOKOA
Aia ke kahua ma ka hikina hema o Wyoming, ma ʻAmelika Hui Pū ʻIa, ma kahi i loaʻa ai nā lua o nā lua pele, ua hana ʻia lākou a pau ma kahi o 280 miliona mau makahiki i hala. Ma kahi ʻatikala hou i paʻi ʻia ma ka 'Geological Society of America Bulletin' (GSA Bulletin) he hui o nā mea noiʻi Kelemania a me ʻAmelika ʻAmelika, i alakaʻi ʻia e Thomas Kenkmann, mai ke Kulanui Kelemania o Freiburg, wehewehe ʻo kēia mau lua lua, ma waena o 10 a me 70 mau mika i loko. anawaena, e hana ia ma hope o ka hopena o ka meteorite i hoʻokahi haneli mau mile, e hoʻolele ana i ka nui o nā pōhaku ma nā wahi, i hoʻi mai ma hope o ka hāʻule ʻana i ka honua i kahi cascade. I ka manawa a
hoʻokuʻi ʻia ka pōhaku ākea me ka honua a i ʻole ka mahina, ua hana ʻia ka lua pele. Hiki i nā poloka nui o ia mea ke hana i ko lākou mau 'puka' i ka lepo.
"ʻO nā alahele - wehewehe ʻo KenKmann - hōʻike i kahi kumu hoʻokahi a pehea i hana ʻia ai nā lua e nā poloka i hoʻokuʻu ʻia mai kahi lua nui nui. Ua ʻike nui ʻia nā lua lua e pili ana i nā lua nui aʻe ma nā hōkūhele a me nā mahina ʻē aʻe, akā ʻaʻole i ʻike ʻia ma ka Honua." Me ka ʻole o ka haʻi ʻana, ua aʻo ka mikiona Changed China 4 i kahi ʻāpana ma ka ʻaoʻao lōʻihi o ka mahina kahi i ʻike ʻia ai kēia ʻano ma kahi o ʻehā 'puna lua': Finsen, Von Kármán L, Von Kármán L' a me Antoniadi.
Ua ʻike mua ʻia ʻo Kerkmann a me kāna hui he 31 lua lua ma Wyoming i waiho ʻole he wahi no ka kānalua, akā ua loaʻa pū kekahi he kanaono ʻaʻole hiki iā lākou ke pili i ka lua nui.
Ua hoʻomaka ka moʻolelo i ka makahiki 2018, i ka wā i noiʻi ai ʻo Kenkmann a me kāna mau hoa hana i nā ʻano lua a puni Douglas, Wyoming. I kēlā manawa, manaʻo mākou ua hana ʻia lākou āpau i nā ʻāpana like ʻole o ka papa hoʻolālā like i haki ʻia i ka lewa. Akā, ua ʻike ʻo ia ma hope mai he mau kakini hou o nā pūʻulu lua o ka makahiki hoʻokahi, e kau ana ma ka ʻāina.
Wahi a ke aʻo ʻana, ʻo nā pōhaku i hana i nā lua lua ma waena o 4 a me 8 mau mika ke anawaena, a hāʻule i lalo i ka lepo ma ka wikiwiki ma waena o 2.520 a me 3.600 km/h. ʻO ka hoʻonui ʻia ʻana o nā alahele o nā mea i hoʻopili ʻia ma luna o nā kumu putative e hōʻike ana i ka lua o ka lua i ʻike ʻole ʻia ma ka hapalua o ka palena ʻo Wyoming-Nebraska ma ka ʻākau o Cheyenne.
Wahi a ka hui, aia paha kēlā lua lua ma waena o 50 a me 65 mau kilomita ka laula, a ua hana ʻia e ka mea hoʻokūkū ma waena o 4 a me 5,4 mau kilomita ke anawaena. Wahi a ka poʻe noiʻi, ua kanu ʻia paha ka lua pele nui i kekahi mau kilomita mai nā sediment i hōʻiliʻili ma hope o ka manawa o ka hopena. ʻO ka nui like o ka sediment, e hoʻopau a hōʻike i nā lua lua i ka wā ma hope loa, e hoʻokiʻekiʻe ʻia ka Sierra Rocosa.
Eia nō naʻe, manaʻoʻiʻo ʻo Kenkmann e hiki ke loaʻa kēia lua lua nui ma ke aʻo ʻana i nā māla magnetic a me ka umekaumaha o ka ʻāina inā loaʻa nā anomalies e hōʻike ana i kona hele ʻana.
