Definitions for "FIELDSTONE"
Loose stone found on the surface or in the soil ("in the field"). Generally applied slab units, flat in the direction of the bedding or lineation of the rock and suitable for settings as dry wall masonry. Stream shingle has much the same shape and appearance, but is not found in the fields. Glacial or alluvial boulders and cobbles, which may be found in or on the soil, are not fieldstone in the strict sense.
Loose blocks separated from ledges by natural processes or glaciers and scattered throughout or upon the ground.
stone that occurs naturally in fields; often used as building material