Cobblestones, npe rau lawvqe-zoo li cov ntawv sib npaug(tseem hu ua pebbles), yoggeological artworkszoo li cov xwm txheej ntau pua lab xyoo.
Lawv creation pib nrog thaum ub tectonic txav - thaumuplifted ancient Riverbeds tsim sandstone roob.
Cov pob zeb nyob hauv cov roob no tau raug dej nyab loj heev, kev thauj mus los hauv dej, thiab kev sib txhuam tsis tu ncua, maj mam hloov mus rau hauv cov duab uas peb paub niaj hnub no.
Geologically, cobblestone tsim nthuav tawm hauv ob theem tseem ceeb:
Pob Zeb Huab Cua & Fragmentation: Tectonic rog ua rau pob zeb tawg; roob dej nyab ua rau cov pob zeb loj heev.
Dej Polishing Phaj: Fragments raug thauj mus rau hauv qab, qhov twgdej yaig thiab inter- pob zeb sib tsootshem tawm cov npoo, tsim cov pob zeb sib npaug / elliptical.
Txoj kev polishing no xav taulab mus txog billions xyoo. faus nrog sediment rau millennia, ntxhib roob pob zeb hloov mus rau hauvexquisitely polished pebbleslos ntawm cov nag tsis tu ncua, dej ntws, thiab kev sib tsoo.