Buku lomwe limafanana ndi njira yolumikizira miyala iwiri kapena yopanda chilengedwe kapena yopanga kuti mufanane ndi mawonekedwe, kuyenda, komanso kukhazikika munkhaniyi. Ma slab atayika kumapeto, kupingaka ndi kuyenda kumapitilira kuchokera ku slab imodzi mpaka kukafika, zomwe zimapangitsa kuti ndizitha kuyenda kapena mawonekedwe.
Miyala yokhala ndi kusuntha kwambiri ndi kukhazikika kwakukulu ndi buku lofananira. Mitundu yambiri ya mwala wachilengedwe, quarvite, gerarzite, granite, ndi tranine, kuti atchule ochepa, ali ndi mayendedwe abwino a buku la buku. Miyala slams imatha kukhala yofanana, yomwe imatanthawuza kuti magawo anayi, m'malo awiri, amafanana ndikudumphira ndi kusuntha kuti apange mawu amphamvu kwambiri.
Gwero lokweza lapereka buku lina lofanana ndi makoma anu posankha.
Gaya Green quartzite
Black Golder Roartzite
Rixartzite
Post Nthawi: Dec-08-2021