Obsidiana
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Na obsidiana e dua na volukano iloilo e dau yaco vakaidina ka ni sa vakadrodroi mai na lava mai na volukila ka lailai sara na tubu ni karisitala. E dua na vatu bukawaqa.[1] E buli mai na felsic lava, na obsidian e vutuniyau ena veika mamada me vaka na silikoni, okisijeni, aluminiumi, sodiumi, kei potasiumi. E dau kune ena loma ni iyalayala ni drodro ni lava ni rhyolitic ka kilai me drodro ni obsidiana. Na drodro oqo e tiko kina e dua na levu ni silica, ka solia vei ira e dua na kaukauwa cecere. Na kaukauwa cecere e tarova na kena veisoliyaki na atomi ena lava, ka tarova na imatai ni kalawa (niukiliataki) ena kena buli na minerale karisitala. Vata kei na totolo ni vakacegu, oqo e rawa kina e dua na iloilo vakayago e buli mai na lava.[2]
Obsidiana e kaukaua, kaukaua, qai sega ni vakaiyalayala; e dau vakacacani kina na kena matailalai. Ena veigauna sa oti, e dau vakayagataki me buli kina na iyaya ni veisele kei na veisele, ka sa vakayagataki vakatovotovo me vaka na veisele scalpeli yame.[3]
Veitikina
[veisau | edit source]- ↑ Rafferty, John P. (2012). Rocks (1st ed.). New York, NY: Britannica Educational Pub. in association with Rosen Educational Services. p. 97. ISBN 9781615304929.
- ↑ Raymond, Loren A. (1995). Petrology : the study of igneous, sedimentary, metamorphic rocks. Dubuque, Iowa: Wm. C. Brown. p. 27. ISBN 0697001903.
- ↑ Brian Cotterell; Johan Kamminga (1992). Mechanics of pre-industrial technology: an introduction to the mechanics of ancient and traditional material culture. Cambridge University Press. pp. 127–. ISBN 978-0-521-42871-2. Retrieved September 9, 2011.