Gold, silver, tin and platinum occur as [[1]] in sands of valley floors and the base of hills.

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Gold, silver, tin, and platinum occur as placer deposits in the sands of valley floors and the base of hills.
Minerals occur in different structures. They occur in volcanic and transformative rocks; minerals might happen in the breaks, holes, blames, or joints. One more method of development includes the deterioration of surface rocks, and the expulsion of solvent constituents, leaving a leftover mass of endured material containing metals. The sea waters contain immense amounts of minerals. Certain minerals might happen as alluvial stores in the sands of valley floors and the foundation of slopes. These stores are called 'placer deposits' and, by and large, contain minerals that are not eroded by water. Gold, silver, tin, and platinum are significant among such minerals.

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