Geology: The geology portrayed in the mapper is the 1:500,000 scale geologic
geodatabase maintained by the MBMG. Click here
to download a free copy of GM 62D, an information booklet
that explains formation names and codes portrayed in the mapper. Note: The geologic map was originally
drawn to match different base maps than those currently served on the MBMG mappers. Therefore
disagreements between the geologic map and landforms will become apparent at scales larger than 1:500,000.