Delivered in a presentation meeting by Hosnul Wahid at Ijen-Geopark Bondowoso office. Before the great fracture occurred, the vast Ijen Caldera was once home to an ancient lake. At that time, the volcanic supply was…
Delivered in a presentation meeting by Hosnul Wahid at Ijen-Geopark Bondowoso office. Before the great fracture occurred, the vast Ijen Caldera was once home to an ancient lake. At that time, the volcanic supply was…