Ka cika wannan jumla: An yi tunanin cewa dutsen da ya yi fice a Rinjani ya yi fice a ƙarni na 13. An rubuta shi "a ƙarshen bazara ko lokacin rani na 1257", wannan
A yanzu ana ganin fashewar Samalas a shekara ta 1257 ita ce tushen sulfur mai yawa da aka samu a cikin samfurori na kankara da ke warwatse kuma wataƙila ita ce "mafi ƙarfin fashewar dutsen mai aman wuta tun lokacin da mutane suka koyi yin rubutu". Wataƙila babban fashewar ya haifar da yanayin sanyin duniya da kuma girbin da bai yi nasara ba. Kafin wannan fashewar, Segara Anak caldera ya kasance dutsen mai aman wuta mai suna Samalas, wanda ya fi Rinjani girma.