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omar

B1 noun

omar nghĩa là tảng đá omar

Các nghĩa

  1. tảng đá omar

    A glacial erratic piece of (typically smooth) dark siliceous greywacke that exhibits a hemispherical pit or hole (as a result of selective dissolution of carbonate concretions within the greywacke), originating in the Omarolluk Formation and carried by glaciers throughout Canada and the United States.

    Omarolluk Formation clasts ('omars') from the Belcher Islands in Hudson Bay, Canada (Prest, 1990).

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