Sediments, txheej txheej saum toj kawg nkaus ntawm cov khoom siv ntawm lub phaj tectonic, uas sib sau thiab deform qhov chaw dej hiav txwv thiab cov phiaj xwm av sib tsoo. Cov sediments no tau muab pov tseg rau saum toj ntawm cov nqes dej hiav txwv crustal thiab tau ntxiv rau ntawm ntug ntawm daim av sab av loj.
daim ntawv accretionary wedge ua li cas?
Ib qho accretionary wedge lossis accretionary prism forms los ntawm sediments accreted mus rau lub non-subducting tectonic phaj ntawm ib tug convergent phaj ciam… Cov khoom siv hauv av, bas alts los ntawm hauv av dej hiav txwv, thiab pelagic thiab hemipelagic sediments.
Prisms nrhiav pom nyob qhov twg?
Accretionary prisms daim ntawv ntawm cov ntug ntawm cov phaj convergent ciam teb los ntawm skimming-tawm sediments thiab pob zeb ntawm lub phaj qisHauv kev nthuav dav, cov txheej txheem kev tsim khoom muaj feem cuam tshuam ntawm cov pob zeb thiab sediments ntawm pem hauv ntej ntawm lub prism los yog underplating (emplacement hauv qab lub prism).
Yuav ua li cas yog ib qho accretionary wedge tsim ntawm subduction zones?
Ntawm thaj tsam subduction, raws li lub phaj qis dhia mus rau hauv lub ntiaj teb, nws khawb rau hauv qab ntawm daim phiaj overriding. Qhov kev txiav txim no tshem tawm cov khoom siv, uas muaj cov pob zeb thiab cov sediment, uas yuav khaws cia rau hauv lub phaj overriding nyob rau hauv ib tug accretionary wedge.
Yuav ua li cas pob zeb tsim ntawm accretionary wedge?
Qhov no txhais tau hais tias cov pob zeb me me hauv cov pob zeb sib xyaw ua ke feem ntau nyob rau hauv qab, uas yog topsy-turvy rau classic Law of Superposition hauv geology. Lub pob zeb thawj hom uas tsim ntawm accretionary wedges yog a jumbled, fractured sedimentary pob zeb hu ua melange
