Porcellanite, kuj sau cov plooj (porcelanite), tawv, ntom pob zeb uas siv nws lub npe los ntawm nws qhov zoo ib yam li cov plooj (veneers) uas tsis muaj porcelain. … Ib qho porcellanite, feem ntau nyob rau hauv lignite deposits, yog tsim los ntawm fusion ntawm shales thiab av nplaum rau hauv pem teb, phab ntsa, thiab ru tsev ntawm cov coal seams.
pob zeb hom twg yog porcellanite?
Porcellanite yog lo lus siv los piav txog porous siliceous sedimentary pob zebnrog lub npub lossis matte luster zoo ib yam li cov plooj (veneers) uas tsis muaj porcelain, whereas chert yog lo lus siv los piav txog qhov ntom ntom, vitreous., nyuaj, thiab brittle pob zeb (Bramlette, 1946).
pob zeb porcelanite yog dab tsi?
Porcellanite lossis porcelanite, yog ib pob zeb tawv tawv me ntsis zoo ib yam li cov porcelain unglazed. Nws feem ntau yog ntau yam tsis huv ntawm chert uas muaj av nplaum thiab calcareous teeb meem. Porcellanite tau pom, piv txwv li, hauv Northern Ireland, Poland thiab Czech koom pheej.
How nyuaj chert?
Chert muaj ob lub zog uas ua rau nws muaj txiaj ntsig tshwj xeeb: 1) nws tawg nrog cov pob txha tawg kom tsim cov npoo ntse heev, thiab, 2) nws yog nyuaj heev (7 rau Mohs Scale). Cov npoo ntawm cov chert tawg yog cov ntse thiab zoo li khaws lawv cov ntse vim chert yog ib lub pob zeb nyuaj thiab ruaj khov heev.
Puas yog pob zeb tsis tshua muaj?
Bedded chert muaj ntau dua hauv Precambrian txaj, tab sis nodular chert tau dhau los ua ntau dua hauv Phanerozoic vim tias tag nrho cov ntim ntawm chert hauv cov ntaub ntawv pob zeb tau ploj zuj zus. Bedded chert tsis tshua muaj tom qabMesozoic thaum ntxov.
