Figure 12. Cross-bedded metamorphic sandstone of the Madrid Formation (Silurian - Devonian age), Kingfield Elementary School, Kingfield, Maine. The mechanical pencil sits at the base of a thick sandstone bed, overlying a thinner sandstone bed, which in turn overlies metamorphic thinner siltstone and sandstone beds. The rocks are not lying horizontally, but have been turned upward by deformation, although the layering of the beds is closely parallel.

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Last updated on November 13, 2006

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