1. a surficial mineral deposit formed by the concentration of small particles of heavy minerals, as gold, rutile, or platinum, in gravel or small sands.
2. the site of a form of mining (placer mining) in which a placer deposit is washed to separate the gold or other valuable minerals.
"golds can be placer."
"particles can be placer."
"developments can be placer."
"deposits can be placer."
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