Pada 5 Oktober 1995, dilakukan pemerksaan Kawah Jonggring Seloko di Puncak G. Semeru. Dari hasil pemeriksaan tersebut terdapat perubahan dasar kawahnya jika dibandingkan dengan hasil pemeriksaan tahun 1994.
Coal petrology ,when employed effectively,is one of the most important tools we have for the management of coal as a producer of energy .to understand the properties of coal in utilization ,coal by-products and their applications ,one requires a thorough appreciation of coal composition and how coal impacts our health and environment.applied coal petrology :the role of petrology in col utilizat…