Sediment forms when pob zeb thiab av huab cua thiab yaig. Nyob ib ncig ntawm 5.2 lab tons ntawm sediment nkag mus rau Chesapeake Bay nyob rau hauv ib lub xyoo nruab nrab. Muaj ob qhov chaw loj ntawm sediment: eroding av thiab kwj ntug dej-hu ua watershed qhov chaw ntawm sediment-thiab eroding shorelines thiab coasts-hu ua tidal qhov chaw ntawm sediment.
cov pob zeb hauv ntiaj teb tuaj qhov twg?
Cov khoom uas tsim cov pob zeb sedimentary hu ua sediment, thiab tej zaum yuav tsim los ntawm geological detritus (minerals) los yog lom detritus (organic teeb meem). Lub geological detritus originated los ntawm huab cua thiab yaig ntawm cov pob zeb uas twb muaj lawm, los yog los ntawm kev ua kom tiav ntawm cov lava molten blobs erupted los ntawm volcanoes.
cov sediments nyob qhov twg?
pob zeb sedimentary yog tsim los ntawm lossis ze ntawm lub ntiaj teb nto, sib piv rau cov pob zeb metamorphic thiab igneous, uas tau tsim tob hauv ntiaj teb. Cov txheej txheem geological tseem ceeb tshaj plaws uas ua rau tsim cov pob zeb sedimentary yog erosion, weathering, dissolution, nag lossis daus, thiab lithification.
Yuav ua li cas sediments?
Clastic sedimentary pob zeb yog ua los ntawm cov khoom (class) ntawm cov pob zeb uas twb muaj lawm. Cov pob zeb yog xoob los ntawm huab cua, ces thauj mus rau qee lub phiab lossis kev nyuaj siab qhov twg cov pob zeb nkag. Yog hais tias cov sediment yog faus tob, nws yuav compacted thiab cemented, tsim sedimentary pob zeb.
magma thiab sediment tsim li cas?
Magma nce mus rau lub ntiaj teb saum npoo, xws li dhau los ntawm lub roob hluav taws kub hnyiab, qhov chaw nws txias thiab tawv rau hauv pob zeb tsis pom kev. Nyob rau saum npoo, huab cua thiab yaig ua rau cov pob zeb tsis zoo ua rau pebbles, xuab zeb, thiab av nkos, tsim cov av nplaum, uas sib sau hauv cov bass ntawm lub ntiaj teb saum npoo.
