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A Geoscience Digital Image Library

2489.jpg
TitleLayering of a metamorphic graywacke, Thomson Formation, near Thomson Dam, Minnesota
DescriptionLayering of metamorphic graywacke in the Proterozic-age Thomson Formation, near Thomson Dam on west side of St. Louis River, just west of Thomson, Carlton County, Minnesota.
ChronostratigraphyProterozoic
LithostratigraphyThomson Formation
Geologic provinceMidcontinent Rift
LocationUSA ▹ Minnesota ▹ Carlton. Near Thomson. Carlton.
Coordinates46.666667,-92.403333
PhotographerJoseph Hartman. 1985.
CollectionJoseph Hartman P05586.
Key wordsGraywacke
Tech details820 KB. Outcrop. Kodachrome, TIFF.
GeoDIL number2489