Abahanga mubyu bumenyi bwisi bavugako ibihugu birimo u Rwanda, u Burundi, Repubulika Iharanira Demokarasi ya Congo, (RDC) ikoraho gatoya, Malawi na Zambia umunsi umwe bizisanga amateka yahindutse na byo bikora ku mazi magari.

U bundi bigenda bite kugirang havuke undi mugabane?

Ubushakashatsi bugaragaza ko isi igizwe nibice bi 3,

harimo icyo wakita nkigikonjo (Crust), aha niho dusanga amazi(Oceanic crust) nu butaka (continental crust) iki kikaba cyoroshye mu buremere ugereranyije na (oceanic crust).

Igice cya 2 kiri hagati cyitwa (Mantle) iki kigizwe  nuduce 2 ari two SIAL(Silicon Aluminium) iyi tuyisanga munsi yubutaka muri 60km na

SIMA (Silicon Magnisium) iyi tuyisanga munsi yamazi magari muri 60km.

Igice cya 3 kitwa (core) nigice kigizwe nibice 2 aribyo (inner core) iki kigizwe nibikoma byumuriro bisukika (Liquid iron na nickel),

Outer core iki kigizwe nibikoma byumuriro bifashe (Solid iron na nickel).

Kugirango umugabane mushya uvuke biterwa nacyagikoma cyo munda yisi gituma habaho gutandukana kwibitare bigize isi ibizwinka (separation of the crust) mugihe bitandukanye bishora gutuma havuka umugabane mushya.

Ubushakashatsi bubivugaho iki?

 Abahanga mu by’Ubumenyi bw’Isi bagaragaza ko iyi migabane irindwi dufite uyu munsi yaturutse ku gushwanyukamo ibice kwa Crust bigizwemo uruhare n’ingufu zituruka mu nda y’Isi kuri cya gice kizwi nka Mantle, kiba kigizwe n’ibitare bishyushye ari na byo bibyara ibikoma bizwi nka magma.

Kugira ngo ubyumve neza, uzarebe iyo imvura ihise, ahiretse amazi hagakama, hatangira kwisaturamo ibice bitandukanye, uko ni na ko Isi imeze. Ibyo bice ubona hejuru byiyashije bisa neza n’ibi dutuyeho biba bisa n’ibireremba kuri uwo muriro.

 Igitabo kigaruka ku mateka y’Isi n’uko yagiye yicamo ibice cyiswe ‘Ancient Supercontinents and the Paleogeography of Earth’ cyanditswe n’abahanga mu by’Ubumenyi bw’Isi barimo Trond Torsvik, Mathew Domeier na Robin Cocks, kigaragaza ko Pangaea yatangiye kwitandukanya hagati y’imyaka miliyoni 195 na miliyoni 170 ishize.

Tugendeye ku ihame ry’Alfred Lothar Wegener’s yagaragaje ko isi yarifite ubutaka bumwe aribwo Pangaea”pan JEE uh” tugereranyije bisobanuye ubutaka bwose,bukaba bwaribuzengurutswe namazi yitwaga (Panthalassa).

Mumyaka 200 ishize Pangea yaje kucikamo kabiri havamo Laurasia (Amerika y’aruguru, Greenland, na Eurasia (Europe na Asia) ni gice cy’Ubuhinde), na Gondwanaland(Amerika yepfo,Africa’Madagascar’India,Arabia,  Malaysia, East Indies, Australia na antarctica ).Uko gutandukana kwatumye havuka inyanja yitwaga Tethys sea.

Mumyaka miliyoni 145 ishize igice cyubutaka bwa magepfo cyaje kuvamo igice cy’ubuhinde gihita kiza muka kerekeza mu majyaruguru

Mumyaka Miliyoni 65 ishize Australia yatandukanye na Antarctica, kugezubu imigabane dufite yagiye ibaho gutyo.

Mu 2018 na bwo abahanga mu Bumenyi bw’Isi bahamije uku gutandukana ubwo uko kwiyasa kwabaga mu gace ka Narok gaherereye mu bilometero 142 uvuye mu Murwa Mukuru wa Kenya, Nairobi, ibyakomeje kwaguka bijyanye n’uko imvura yakomezaga kugwa.  

Mubutayu bwa Afar bwo muri Ethiopia hagaragaye umwobo munini imbarutso yabaye iruka ryikiruka cya Dabbahu muri 2005.gusa aha hahurira Arabian plate, African Plate na Somali Plate. Uyumwobo ukaba ugenda ukome za genda waguka.

Ugendeye kuri uyu murongo ubona ko gucikamo ibice kuzahera hagati muri Ethiopia, bikomereze mu Majyepfo ya Sudan y’Epfo bigere mu Burengerazuba bwa Uganda no mu Burasirazuba bwa RDC, binyure ku Rwanda n’u Burundi mu Burengerazuba, bikomereze mu Majyepfo ya Tanzania n’Uburengerazuba bwa Zambia na Malawi n’agace gato ka Mozambique, ayo mazi ahite ahura n’Inyanja y’Abahinde.