Dufuna kwalekwale
Kwalekwalen Dufuna wani kwale-kwale ne da wani bafulatani makiyaya ya gano a shekarar 1987 mai tazarar kilomita kadan daga kauyen Dufuna da ke cikin karamar hukumar Fune, wanda ba shi da nisa da kogin Komadugu Gana, a jihar Yobe a Najeriya .Radiocarbon da ke nuna samfurin gawayi da aka samu a kusa da wurin,kwale-kwalen yana da shekaru 8,500 zuwa 8,000,yana danganta wurin da tafkin Chadi .Jirgin ruwan yana da 8.4 metres (28 ft) tsayi kuma yana da 0.5 metres (1 ft 8 in) tsayi a wurinsa mafi girma.[1]A halin yanzu tana Damaturu, Nigeria.
Fage
[gyara sashe | gyara masomin]An gano kwale-kwalen Dufuna ne a kauyen Dufuna,wanda ke tsakanin Potiskum da Gashua,a jihar Yobe.[2] :5A ranar 4 ga watan Mayun 1987,wani Bafullatani makiyayi mai suna Mallam Ya’u yana haƙa rijiya,ya bugi wani abu mai kauri a tsawon mita 4.5.[2] :5Ya sanar da sarkin kauyensu game da gano abin. [2] :5
A shekarun 1989 da 1990, Jami'ar Maiduguri ta fara binciken wurin domin tabbatar da ko kwalekwale ne da kuma daukar samfurin katako na radiocarbon.[2] :5Bayan haka,a wani aikin bincike na hadin gwiwa da Jami’ar Frankfurt da Maiduguri suka bayar na Farfesa Peter Breunig da Garba Abubakar,za su koma wurin kuma an kara daukar samfurin itace da wasu dakunan gwaje-gwaje na Jamus guda biyu.[2]:5
A shekarar 1994,wata tawagar binciken ilmin kimiya na kayan tarihi daga kasashen Jamus da Najeriya ta tono wurin,inda ma’aikata hamsin suka hako kwalekwalen sama da mako biyu,inda aka gano tsawonsa ya kai mita 8.4,fadinsa mita 0.5 da kauri 5cm.[2]:5–6An gano kwale-kwalen a cikin wani ruwa da ke kwance a kan gado mai yashi yayin da yadudduka na yumbu ke kwance a tsakaninsa da saman da ke kare shi a cikin yanayi mara amfani da iskar oxygen.[2]:5Binciken kwale-kwalen ya nuna cewa an yi amfani da baka da kashin baya da fasaha zuwa maki kuma an gudanar da aikin ne ta hanyar "kayan aikin gatari-kamar da tsinke gatari bifacial kayayyakin aiki na micro-lithic kama". [2] :8Farfesa Breunig ya ce fasahar gine-gine ta nuna dogon ci gaba kuma kwalekwalen ba sabon zane ba ne.[2] :9A wani binciken da wata kungiyar kimiya ta Amurka ta gudanar a shekarar 2015,sun gano cewa tafkin Chadi ya ragu da kashi 95 cikin dari a cikin shekaru arba'in saboda haka ana iya tunanin cewa yankin kauyen Dufuna zai kasance wani bangare na bala'in ambaliya da tabkin a baya. . [2] :6–7
Kwalekwalen an yi kwanan watan radiocarbon aƙalla sau biyu, kuma an yi kwanan watan zuwa 6556-6388 KZ da kuma zuwa 6164-6005 KZ, [1] wanda ya sa ya zama sanannen jirgin ruwa mafi tsufa a Afirka kuma (bayan kwalekwalen Pesse ) na biyu mafi tsufa a duniya.[1]Wataƙila an ƙirƙira shi ne a cikin al’adar yin kwale-kwale da aka daɗe ana amfani da ita wajen kamun kifi a gefen kogin Komadugu Gana .[1]Mai yiwuwa mambobi ne na jama'ar da suka mamaye wani yanki daga yammacin yankin Sahara zuwa kogin Nilu na tsakiyar Sudan zuwa yankin arewacin Kenya .[1]
Duba kuma
[gyara sashe | gyara masomin]- Jirgin ruwan kamun kifi na gargajiya
- Jerin tsoffin jiragen ruwa