Cov pob tsuas yog tsim los ntawm chalk, ib qho mos mos, zoo nkauj heev lis pob zeb ntshiab, thiab feem ntau yog 300-400m tob. Cov khaubncaws sab nraud povtseg tau tsim maj mam dhau ntau lab xyoo. … Qhov tshwm sim ntawm cov av nplaum yog lub cim Dawb Cliffs ntawm Dover.
pob zeb dab tsi yog Dawb Cliffs ntawm Dover?
Tsis muaj ntau qhov chaw hauv ntiaj teb uas koj tuaj yeem pom pob tsuas. Tej zaum nws yuav nyuaj rau ntseeg, tab sis qhov stretch ntawm ntug dej hiav txwv no yog ua los ntawm chalk Chalk yog mos dawb, finely grained limestone ua los ntawm cov seem ntawm coccoliths. Cov me me planktonic ntsuab algae ib zaug ntab hauv hiav txwv.
Lub Pob Zeb Dawb uas muaj chalk deposits nyob qhov twg?
Lub Pob Zeb Dawb ntawm Dover yog thaj tsam ntawm Askiv ntug dej hiav txwv tig mus rau Strait of Dover thiab Fabkis Lub pob tsuas, uas nce mus txog qhov siab ntawm 350 feet (110 m), tshuav nqi Nws zoo nkaus li zoo nkauj rau nws cov khoom sib xyaw ntawm chalk accented los ntawm streaks ntawm dub flint, tso rau thaum lub sij hawm Cretaceous lig.
Cov kab mob dab tsi ua rau Dawb Cliffs ntawm Dover?
Cov pob tsuas yog tsim los ntawm cov av dawb dawb, lossis calcite, ua los ntawm coccolithophores - me me, ib leeg-celled algae nyob hauv qab ntawm cov khoom noj hauv hiav txwv.
Puas Dawb Cliffs ntawm Dover ua los ntawm diatoms?
[UK] England's famed Dawb Cliffs ntawm Dover tau tsim yuav luag 100 lab xyoo dhau los tawm ntawm cov crushed plhaub ntawm me me ib leeg-celled algae. Tam sim no ib pab kws tshawb fawb tau txheeb xyuas cov dej hiav txwv tshwj xeeb tsim nyog rau cov tsiaj hiav txwv no kom vam meej.
