Generalized Geologic Map of the Upper Animas River Watershed and Vicinity, Silverton, Colorado

Online link https://geo-nsdi.er.usgs.gov/metadata/map-mf/2377/metadata.faq.html
Description This dataset represents geology compiled for the upper Animas River Watershed near Silverton, Colorado. The source data used are derived from 1:24,000, 1:20,000, 1:48,000 and 1:250,000-scale geologic maps by geologists who have worked in this area since
Originators Yager, Douglas B. and Bove, Dana J.
Publication U.S. Geological Survey Miscellaneous Field Studies Map MF-2377

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Overview of attributes

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>ATTRIBUTE NAME: LABEL
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>DESCRIPTION: geologic unit text label
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>(see table below)
>ATTRIBUTE NAME: MODIFIER
>DATABASE ITEM STRUCTURE: 10,10,C,0
>DESCRIPTION: additional information for description, if any
>ITEM VALUES FOR 'MODIFIER':
>gravel pit
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>DESCRIPTION: shade symbol in color524.shd used to color polygons
>ITEM VALUES FOR 'SYMBOL':
>(see table below)
>ATTRIBUTE NAME: DESC
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>DESCRIPTION: text description of geologic unit
>ITEM VALUES FOR 'DESC':
>(see table below)
>RELATION OF ITEMS LABEL,MODIFIER, SYMBOL, and DESC:
>LABEL   MODIFIER  SYMBOL   DESC
>Kd                   454   Dakota Sandstone (Lower Cretaceous)
>Km                   491   Mancos Shale (Upper Cretaceous)
>Kmg                  432   Mount Garfield Formation and tongues of Mancos Shale (Upper Cretaceous)
>Qa                     6   Alluvium of tributary channels (Holocene and late Pleistocene)
>Qac                   25   Undivided alluvium and colluvium (Holocene and latest Pleistocene)
>Qalc1                 11   Stream channel and floodplain deposits along the Colorado River (Holocene)
>Qalc1   gravel pit    11   Stream channel and floodplain deposits along the Colorado River (Holocene)
>Qalc2                 11   Alluvium deposited by the Colorado River (Holocene and latest Pleistocene)
>Qalc2   gravel pit    11   Alluvium deposited by the Colorado River (Holocene and latest Pleistocene)
>Qls                   39   Landslide deposits (Holocene and late Pleistocene)
>Qp4                  451   Pediment deposit north of Sink Creek (early? Pleistocene)
>Qpmv                 451   Pediment deposit east of Moulton Valley (late? Pleistocene)
>Qpu                  451   Undifferentiated pediment deposits (early? Pleistocene)
>Qt1                   22   Terrace alluvium (late Pleistocene)
>Qt2                   46   Terrace alluvium (middle Pleistocene)
>Qt2     gravel pit    46   Terrace alluvium (middle Pleistocene)
>Qt3                  110   Terrace alluvium (early Pleistocene)
>Qt3     gravel pit   110   Terrace alluvium (early Pleistocene)
>Qt4                   62   Terrace alluvium (early Pleistocene)
>Qt5                   29   Terrace alluvium (early Pleistocene)
>Qtsc                  14   Terrace alluvium of Sink Creek (late to middle Pleistocene)
>Qtu                   20   Undifferentiated terrace alluvium (middle to early Pleistocene)
>af                     8   Artificial fill (latest Holocene)
>(none)               327   water
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>RELATIONSHIP OF ITEMS LINETYPE and SYMBOL:
>LINETYPE                           SYMBOL
>contact; certain                        1
>gravel pit boundary                     1
>contact; topographic escarpment       171
>map boundary                          173
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>ITEM VALUES FOR 'LINETYPE':
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none