| Title | Layering of a metamorphic graywacke, Thomson Formation, near Thomson Dam, Minnesota |
| Description | Layering 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. |
| Chronostratigraphy | Proterozoic |
| Lithostratigraphy | Thomson Formation |
| Geologic province | Midcontinent Rift |
| Location | USA ▹ Minnesota ▹ Carlton. Near Thomson. Carlton. |
| Coordinates | 46.666667,-92.403333 |
| Photographer | Joseph Hartman. 1985. |
| Collection | Joseph Hartman P05586. |
| Key words | Graywacke |
| Tech details | 820 KB. Outcrop. Kodachrome, TIFF. |
| GeoDIL number | 2489 |
 |