Video: Puas yog ammonite fossils tsim nyog nyiaj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov tsiaj hiav txwv thaum ub tau ntaus pob ncaws pob ribbed spiral-form plhaub, thiab nyob nruab nrab ntawm 240-65 lab xyoo dhau los, thaum lawv raug tshem tawm nrog rau cov dinosaurs. Qhov no pob txha ntseeg tias nyob ib ncig ntawm 180 lab xyoo thiab tuaj yeem yog tsim nyog nyob ib ncig ntawm $ 3000 (£ 2, 200), txawm hais tias Mr Donne hais tias nws tsis yog muag.
Tsuas yog li ntawd, puas yog ammonite fossils tsawg?
Anaptychi kuj yog tsis tshua muaj raws li pob txha . Lawv pom sawv cev ammonites los ntawm lub sij hawm Devonian mus rau lub sij hawm Cretaceous. Calcified aptychi tsuas yog tshwm sim hauv ammonites los ntawm Mesozoic era. Lawv yuav luag ib txwm pom cais tawm ntawm lub plhaub, thiab tsuas yog heev tsis tshua muaj khaws cia rau hauv qhov chaw.
Muaj pes tsawg ammonite fossils? Fossil Cov ntaub ntawv Ammonites yog cov yug me nyuam loj hlob, nyob hauv tsev kawm ntawv, thiab muaj ntau tshaj plaws pob txha pom hnub no. Lawv tau ploj mus nrog cov dinosaurs 65 lab xyoo dhau los. Cov kws tshawb fawb siv ntau yam duab thiab qhov ntau thiab tsawg ammonite shells uas tshwm sim thiab ploj mus dhau lub hnub nyoog mus rau lwm yam pob txha.
Kuj tseem paub, cov pob txha puas tsim nyog tau nyiaj?
Fossils yog yuav ntau npaum li ib tug yuav ib tug sculpture los yog painting, mus decorate lub tsev. Hmoov tsis zoo, thaum tus nqi ntawm lub thwj tsis tshua muaj tiag tsuas yog qhov uas ib tus neeg txaus siab them rau nws, cov khoom siv keeb kwm tsis tshua muaj, xws li pob txha , kuj yog cov uas muaj txiaj ntsig zoo tshaj plaws.
Nyob qhov twg ammonite fossils pom?
Niaj hnub no, ammonite fossils feem ntau pom nyob rau hauv feem ntau cov pob zeb sedimentary los ntawm Devonian mus rau Cretaceous lub sij hawm, thiab outcrops ntawm cov pob zeb no yuav ua tau. pom nyob rau hauv roob thiab sedimentary basins. Xws li outcrops muaj xws li quarries, hiav txwv coasts, dej shores, suab puam, canyons thiab txawm underground cellars.
Pom zoo:
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