Varved deposits feem ntau txuam nrog sedimentation hauv pas dej, tshwj xeeb tshaj yog cov uas nyob rau hauv glacial los yog proglacial ib puag ncig. Thaum lub caij ntuj sov, cov av nkos tau thauj mus rau hauv lub pas dej los ntawm cov pas dej nyob ib puag ncig vim yog cov dej khov yaj thiab cov dej ntws tawm.
varves tsim li cas?
Varves daim ntawv vim raws caij nyoog hloov pauv hauv qhov chaw glacialCov no suav nrog cov txheej txheem xws li cov dej yaj thiab cov dej nkag nkag, cov dej khov hauv pas dej, cua shear thiab nag lossis daus. … Ntau lub pas dej glacial tsim thaum lub sij hawm kawg Glacial Termination (LGT, c. 21-14 ka) raws li cov ntaub ntawv dej khov loj hauv av rov qab los yog yaj tag.
Koj xav pom qhov twg?
Varves yog sediments uas muaj cov khaubncaws sab nraud povtseg txhua xyoo. Lawv feem ntau tsim hauv cov pas dej uas ciam teb glaciers lossis khov thaum lub caij ntuj no, vim cov pas dej tau txais cov av tsis tu ncua thaum lawv khov thiab khov. Cov varved sediments tau tso nrog Glacial Lake Missoula.
varves yog dab tsi thiab koj xav pom lawv nyob qhov twg?
A varve tsuas yog txhais tau tias: ib xyoo sediment txheej. Qhov twg peb pom varves niaj hnub no, feem ntau nyob rau hauv lub pas dej (lacustrine) deposits, tab sis kuj nyob rau hauv ib co marine ib puag ncig, muaj raws caij nyoog los yog txhua xyoo variations nyob rau hauv deposition lub luag hauj lwm rau contrasting txheej nyob rau hauv ib xyoos.
Vim li cas varves Qhov twg varves Form ua li cas lawv tsim Vim li cas lawv tseem ceeb?
Kev tsim. Varves daim ntawv nyob rau hauv ntau yam marine thiab lacustrine depositional ib puag ncig los ntawm lub caij nyoog variation nyob rau hauv clastic, biological, thiab tshuaj sedimentary txheej txheem … Ntxiv rau lub caij nyoog variation ntawm sedimentary txheej txheem thiab deposition, varve tsim yuav tsum tsis muaj ntawm bioturbation.
