To learn more about geologic maps, see:

USGS

• Database of the Geologic Map of North America
• National Cooperative Geologic Mapping Program (NCGMP)
• NCGMP's "Introduction to Geologic Mapping"
• USGS/AASG National Geologic Map Database
• USGS/AASG MapView
• USGS’s Geologic Maps of the U.S. States
• USGS’s Geology of the Conterminous U.S.
• USGS EDMAP Program - Training the Next Generation of Geoscientists
• USGS EDMAP Program- Webinar
• Paleontology Portal’s Tapestry of Time Teacher’s Guide
• A Tapestry of Time and Terrain

AASG

• Find Your State's Geologic Map Here

NPS

• NPS Geologic Resources Inventory

AGI

• Geologic Map Day
• AGI’s Meeting Challenges with Geologic Maps

Additional:

• OneGeology Portal

Look for Geologic Map Day on Facebook and Twitter!