Dab tsi yog qhov tseem ceeb ntawm qhov index fossil?
Dab tsi yog qhov tseem ceeb ntawm qhov index fossil?

Video: Dab tsi yog qhov tseem ceeb ntawm qhov index fossil?

Video: Dab tsi yog qhov tseem ceeb ntawm qhov index fossil?
Video: Nau-es | Noah: Dej Nyab Ntiajteb - Story of the Bible (Los Saib Thiaj Paub) 2024, Kaum ib hlis
Anonim

Index cov pob txha yog siv los ntawm ob qho tib si geologists thiab paleontologists los kawm cov pob zeb thiab hom ntawm yav dhau los. Lawv pab muab lub hnub nyoog txheeb ze rau cov pob zeb txheej thiab lwm yam pob txha pom nyob rau hauv tib txheej.

Xav txog qhov no, dab tsi zoo ua rau Graptolites muaj txiaj ntsig index fossil?

A zoo index fossil yog ib tug nrog plaub yam ntxwv : nws yog qhov txawv, dav, ntau, thiab txwv nyob rau hauv lub sij hawm geological. Vim feem ntau pob txha - bearing pob zeb tsim nyob rau hauv dej hiav txwv, qhov loj index fossils yog cov kab mob marine. Uas tau hais tias, qee yam tsiaj txhu hauv av yog pab tau hauv cov pob zeb hluas thiab cov cheeb tsam tshwj xeeb.

Tsis tas li ntawd, vim li cas thiaj tseem ceeb rau tib neeg los kawm txog pob txha? Peb lub tswv yim yog tseem ceeb hauv kawm thiab siv pob txha : (1) Fossils sawv cev qhov seem ntawm cov kab mob ib zaug nyob. (2) Feem ntau pob txha yog cov seem ntawm cov kab mob uas ploj lawm; uas yog, lawv yog cov tsiaj uas tsis nyob txhua qhov chaw hauv ntiaj teb.

Tsis tas li ntawd, peb tuaj yeem kawm dab tsi los ntawm index fossils?

Index fossils yog ntawm cov kab mob uas nyob thoob plaws cheeb tsam. Lawv nyob rau ib lub sij hawm luv luv. Ib index pob zeb tso cai rau tus kws tshawb fawb los txiav txim seb lub hnub nyoog ntawm lub pob zeb nws nyob hauv. Trilobite pob txha , raws li qhia hauv daim duab, yog feem ntau index fossils.

Dab tsi yog cov yam ntxwv ntawm qhov tseem ceeb index fossil?

A pab tau index fossil yuav tsum muaj qhov tshwj xeeb lossis pom tau yooj yim, muaj ntau, thiab muaj qhov dav ntawm thaj chaw faib khoom thiab ib qho luv luv los ntawm lub sijhawm. Index cov pob txha yog lub hauv paus rau kev txhais ciam teb nyob rau hauv lub sij hawm geological scale thiab rau correlation ntawm strata.

Pom zoo: