Map service: Database of the Geologic Map of North America- Adapted from the Map by J.C. Reed, Jr. and others (2005)
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This map layer contains geologic unit boundaries for the area depicted in the Geologic Map of North America, published by the Geological Society of America in 2005 (Reed et. al, 2005). Digital data were compiled from source data at a scale of 1:5,000,000 and are not intended to be used at a larger (greater detail) scale.
创建时间：
2016-10-29
