Video: Dab tsi yog qhov kev txiav txim ntawm sediment loj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Dab tsi yog qhov kev txiav txim ntawm sediment loj los ntawm qhov tsawg tshaj plaws mus rau loj? a. av nplaum, silt, xuab zeb, granule, pebble, cobble, pob zeb. Sediments uas yog grey nyob rau hauv cov xim muaj hlau, thiab cov uas yog tan rau chocolate xim av muaj silica cov ntsiab lus siab.
Yog li ntawd, cov sediments cais raws li qhov loj me li cas?
Clastic Sedimentary Pob zeb Sedimentary pob zeb tsim thaum twg los xij sediments yog deposited thiab lithified thiab yuav ua tau cais raws li qhov qhov loj ntawm lawv cov nplej. Gravel forms coarse pob zeb nrog nplej ntau tshaj 2 mm nyob rau hauv qhov loj . Yog hais tias cov fragments yog sib npaug, lawv tsim conglomerate, thiab yog hais tias lawv yog angular, lawv tsim breccia.
Tsis tas li ntawd, dab tsi yog qhov luaj li cas ntawm cov sediments?
| Lub npe Particle | Qhov Loj | Pob zeb sib sau |
|---|---|---|
| Pebble | 2-64 hli | Conglomerate los yog Breccia (nyob ntawm qhov sib npaug) |
| Xuab zeb | 1/16-2 hli | Sandstone |
| Silt | 1/256 - 1/16 mm | Siltstone |
| Av nplaum | <1/256 hli | Claystone, av nkos, thiab shale |
Ib tug kuj yuav nug, dab tsi yog qhov zoo tshaj sediment?
Sediments yog unconsolidated, uas txhais tau hais tias cov nplej yog cais thiab unattached rau ib leeg. Clay yog tus zoo tshaj sediment . Pob zeb muaj xws li tag nrho cov kab sib npaug coarser tshaj 2 mm nyob rau hauv txoj kab uas hla. Lithification yog lub ntsiab lus dav dav rau cov txheej txheem uas hloov xoob sediment hauv a sedimentary pob zeb.
Dab tsi yog qhov ntau ntawm cov pob zeb me me uas tau muab cais ua pebbles?
Particle loj (grain loj)
| φ nplai | Qhov ntau thiab tsawg (metric) | Lwm lub npe |
|---|---|---|
| -4 - 5 | 16-32 hli | Pebble |
| -3 mus -4 | 8-16 mm | Pebble |
| -2 - 3 | 4-8 hli | Pebble |
| -1 - 2 | 2-4 mm | Granule |
Pom zoo:
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