Iron ya bitumen: Petroleum yajugunywe ku nkombe z'isi kuva kera cyane muri kamere kandi ihura n'umwuka n'ubushuhe. Ibikubiyemo byamavuta yoroheje birashira buhoro buhoro, kandi bitumen byatumen bikozwe mugukora no kubeshya bikunze kuvangwa nuburyo runaka bwamabuye y'agaciro. Bitumen Kamere irashobora kwigabanyamo ibiceri bitarume, ibitutsi bya rock, submarine, starmarine bitumen, shale ya peteroli, nibindi ukurikije ibidukikije.
Ibitutsi bya rock ni ibintu bisa na bitumen bikomoka mubice bya kera bigana ku nkombe z'amabuye, naho nyuma yimyaka amamiriyoni yo kubitsa, guhindurwa, adsoisip, ku mbaraga, okisiction, impyisi, katafoni, nibindi.

Amashusho ya Butumen yahinduye bitumen akoresha bitumen nkumuco kandi avanze na matrix bitumen ukurikije igipimo runaka cyo kuvanga. Bitumen byahinduwe bikozwe mubikorwa nko kuvanga, guhinga, no guteza imbere. Iregwa nka NMB.
Urutare Bitumen rwahinduwe bitumen nivanga ryakozwe na "itontoma" zishingiye kuri "rock bitumen yahinduwe bitumen" cyangwa imvange yakozwe na gahunda "yumye" ishingiye kuri "rock bitumen".
"Uburyo bwumye" inzira "uburyo bwumye" bivuze ko nyuma yo gusuka inkono ivanze mugihe runaka, hanyuma bigaterwa mubice bitatu byumye mugihe cyatumen ivanze.
"Uburyo butose" Inzira "Uburyo butose" bivuze ko imico ya bitumen hamwe na bitumen ivanze yatumen, hanyuma iterwa no kuvanga bitumen, hanyuma ikabazwa mu nkono yo kuvanga kuvanga hamwe n'ibuye. Biturumen kuvanga.