Makona mashoma asara pasi pano apo vanhu vanogona kunakidzwa nenzvimbo inogona kuvabatsira zvakanyanya seGungwa Rakafa. Musanganiswa wayo wemunyu unodzivirira hupenyu hwemumvura kubva mauri, asi unopa zororo rakakura kune avo vanotambura nechirwere chipi zvacho. Kunyangwe iyi nzvimbo isinganzwisisike inogona kuve nemazuva ayo akaverengwa.
Chikwata chehunyanzvi kubva kuGeological Survey yeIsrael neHebrew University yeJerusarema, pamwe nekubatana kwevamwe nyanzvi vanobva kunyika dzakasiyana, vawana humbowo hwekupisa kwakanyanya munzvimbo dzakadzika dzeGungwa Rakafa, iyo inogona kuratidza ramangwana guru nzvimbo shanduko kana tembiricha dzichiramba dzichikwira.
Chidzidzo, icho chakaburitswa mumagazini »Pasi uye Mapuraneti Sayenzi Tsamba», yakavakirwa pauwandu hwemunyu muchimiro che halite, inova sedimentary mineral inogadzira apo mvura yemunyu inopwa, iyo yakawanikwa mune saline cores yezvidhoma yakaburitswa mazana mana emamita kubva pasi pegungwa (anenge 1.150 metres kubva pamusoro). Sezvo vatsvakurudzi vanotsanangura, halite inongomhanya chete kana iwo huwandu hwemvura hwadzikira.
Mushure mekutarisa zera uye nguva yekuumbwa kwezvimedu, ivo vakakwanisa kuziva kuti mwero weGungwa Rakafa wakadzika zvakanyanya panguva mbiri dzegungwa: yekutanga iri pakati peanenge makore zviuru gumi neshanu kusvika mazana matatu nemakumi matatu apfuura, uye yechipiri makore angangoita zviuru gumi apfuura. Pakati peiyi nguva iyo nhanho yakadonha anenge mazana mashanu emamita, uye yakaramba yakadaro dzimwe nguva kwemakumi emakore.
Tembiricha yakakwira anopfuura madhigirii mana pamusoro pevhareji muzana ramakore rechi4, zvinova ndizvo zvinofungidzirwa nemasayendisiti kuti zvichaitika zvakare muzana rino ramakore. Nehurombo, hapana chinogona kuitwa kumisa maitiro, »mamodheru emamiriro ekunze anofungidzira kukura kukuru munzvimbo iyi»Vatsvakurudzi vakati.
Unogona kuverenga chidzidzo pano.