Sandstone yog pob zeb sedimentary

Sandstone yog cov pob zeb sedimentary tsim los ntawm kev sib cog lus thiab kev sib cais ntawm cov xuab zeb loj. Cov nplej no feem ntau yog ua los ntawm quartz, feldspar thiab lwm yam minerals. Cov xim feem ntau ntawm sandstone yog xim liab. Tab sis, nws tuaj yeem yog grey lossis dawb thiab.

Feem ntau cov ntxhia hauv sandstone yog quartz. Txawm li cas los xij, lwm yam minerals tuaj yeem tshwm sim, suav nrog calcite, hematite thiab hlau oxide. Nws tuaj yeem ua tau translucent. Yog hais tias sandstone raug dej, tshuaj weathering yuav yaj cov minerals. Qhov no ua rau lub pob zeb nkig.

Feem ntau, sandstone yog lub pob zeb uas muaj qhov ntxeem tau. Qhov no yog vim qhov tseeb tias dej muaj peev xwm mloog zoo raws li cov xuab zeb-shale hu. Thaum qhov no tshwm sim, microbes tuaj yeem nkag mus rau hauv lub qhov thiab tuav. Lwm yam tseem ceeb kuj tuaj yeem ua rau lub ntsej muag ntawm cov xuab zeb.

Cov pob zeb sedimentary tau tso rau hauv cov txheej hu ua txaj. Lawv tsim los ntawm mosaic ntawm ntau hom sediment. Qee qhov feem ntau tshwm sim sedimentary pob zeb yog sandstone, limestone thiab chalk. Feem ntau cov pob zeb sedimentary yog cov xuab zeb, av nkos lossis chalk.

Sandstone tuaj yeem ua daj daj, liab lossis xim av. Lub pob zeb liab daj yog feem ntau yog tsim los ntawm sandstone txaj ntawm ntau qhov ntau thiab tsawg. Nyob ntawm cov pob zeb tseem ceeb tshaj plaws, cov xim liab tuaj yeem ua los ntawm liab dawb mus rau tsaus liab. Cov pob zeb liab tuaj yeem ua rau igneous, sedimentary los yog ob qho tib si.