Zoomable version (https://www.easyzoom.com/imageaccess/613e6664b7db43769ade1405ff36ac2c)
Source (https://eastofnowhere.co/pages/north-america-1911)
Via (https://reddit.com/r/dataisbeautiful/comments/z4u9yr/oc_the_bedrock_geology_of_north_america/)
If you enjoy this, you may also enjoy (https://en.wikipedia.org/wiki/Terrain_cartography)
danelabonte 