Dab tsi yog coquina pob zeb siv rau?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Ib tug sedimentary pob zeb muaj xws li loosely-consolidated fragments ntawm plhaub thiab/los yog coral. Cov matrix los yog "cement" consolidating cov fragments feem ntau yog calcium carbonate los yog phosphate. Coquina yog mos, dawb pob zeb uas feem ntau siv raws li lub tsev pob zeb. Coquina cov ntaub ntawv nyob ze ntug dej hiav txwv, xws li marine reefs.

Tom qab ntawd, ib tug kuj nug, dab tsi yog kev siv ntawm coquina?

Coquina kuj tau siv raws li qhov chaw ntawm paving khoom. Nws feem ntau yog cemented tsis zoo thiab yooj yim tawg rau hauv cov khoom siv plhaub los yog coral fragments, uas tuaj yeem hloov tau rau pob zeb lossis pob zeb nyuaj. Loj daim ntawm coquina ntawm cov duab txawv txawv yog qee zaum siv raws li kev kho kom zoo nkauj toj roob hauv pes.

Qhov thib ob, ua li cas lub pob zeb coquina? Coquina pob zeb yog ib hom sedimentary pob zeb (tshwj xeeb yog limestone), tsim los ntawm cov deposition thiab tom qab cementation ntawm cov ntxhia los yog cov organic hais nyob rau hauv pem teb ntawm dej hiav txwv los yog lwm yam dej ntawm lub ntiaj teb nto. Hauv lwm lo lus, lub pob zeb tsim los ntawm tsub zuj zuj ntawm sediments.

Raws li, coquina pob zeb yog dab tsi?

ˈkiːn?/) yog sedimentary pob zeb uas yog tsim los ntawm tag nrho los yog yuav luag tag nrho ntawm cov thauj, abraded, thiab mechanically-sorted fragments ntawm lub plhaub ntawm mollusks, trilobites, brachiopods, los yog lwm yam invertebrates. Lub sij hawm coquina los ntawm lus Spanish rau "cockle" thiab "shellfish".

Cov xeev twg hauv Asmeskas muaj coquina ntau?

Tseem ceeb deposits ntawm coquina muaj nyob raws ntug dej hiav txwv ntawm Florida thiab North Carolina. Lawv kuj tshwm sim raws ntug dej hiav txwv ntawm Australia, Brazil, Mexico thiab lub United Lub Nceeg Vaj. Tom qab deposition, calcium carbonate feem ntau precipitates nyob rau hauv sediment.