n.1.(Min.) Siderite occuring in spheroidal masses.
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Complete or partial dissolution of the siderite and subsequent recrystallization resulted in the formation of isolated bodies consisting of spongy, spheroidal siderite with a radiating structure, locally referred to as spherosiderite. Close proximity of the carbonate orebody to the surface for a long period of time permitted considerable surface oxidation and decomposition to a depth of 40-50 meters.
In the Andrassy I and III sections there are isolated masses, locally referred to as "spherosiderite" ores, which consist of spongy masses of recrystallized siderite with a radiating spheroidal structure.