Dodatkowe przykłady dopasowywane są do haseł w zautomatyzowany sposób - nie gwarantujemy ich poprawności.
Alluvial placers are those formed in river or stream sediments.
It was presumably collected by panning from alluvial placers in river beds or near old rivers.
Alluvial placers are formed by the deposition of dense particles at a site where water velocity remains below that required to transport them further.