A concretion muaj tib yam khoom raws li lub pob zeb nyob ib ncig ntawm nws, ntxiv rau cov cementing ntxhia, qhov nodule (xws li flint nodules hauv limestone) yog tsim los ntawm cov khoom sib txawv. Concretions tuaj yeem ua tau zoo li lub tog raj kheej, nplooj ntawv, ze li qhov zoo tshaj plaws spheres, thiab txhua yam nyob nruab nrab. Feem ntau yog spherical.
kev sib haum xeeb zoo li cas?
Concretions yog feem ntau ovoid lossis kheej kheej hauv cov duab, txawm tias cov duab tsis sib xws kuj tshwm sim. … Concretions tsim nyob rau hauv cov khaubncaws sab nraud povtseg ntawm sedimentary strata uas twb tau tso lawm. Lawv feem ntau tsim thaum ntxov hauv keeb kwm kev faus neeg ntawm cov pob zeb, ua ntej cov seem ntawm cov sediment yog tawv rau hauv pob zeb.
Kuv tuaj yeem nrhiav pom qhov twg?
Kev sib cog lus pom nyob ze thiab deb, los ntawm Western Kazakhstan mus rau ntug hiav txwv dej hauv California. Feem ntau qhov loj ntawm cannonballs, lawv tsim los ntawm dej eroding ib thooj tawm ntawm cov pob zeb sedimentary. Lawv yuav luag zoo li neeg tsim. Ntau cov pob txha ntawm cov tsiaj tuag tau pom hauv cov pob zeb txawv txawv no."
Puas concretions muaj fossils nyob rau hauv?
Concretions feem ntau nkag siab yuam kev geology. Feem ntau yuam kev rau cov qe pob txha, vaub kib, lossis cov pob txha, lawv yogqhov tseeb tsis yog pob txha ntawm tag nrho tab sis ib qho xwm txheej tshwm sim hauv yuav luag txhua hom pob zeb sedimentary, suav nrog sandstones, shales, siltstones, thiab limestones.
Yuav ua li cas thiaj tsim nyog?
Feem ntau, calcareous concretions yog valuedzoo li pearls. Cov xim ci dua thiab muaj zog saturations hais kom tus nqi siab dua. Rounds thiab ovals yog qhov xav tau ntau dua, thiab lwm cov duab raug txiav txim raws li qhov sib luag uas lawv tshwm sim. Smooder nto, siab dua luster, thiab loj loj kuj nce nqi.
