to the National Atlas Home page
About | Fact Sheets | Contact Us | Partners | Products | Site Map | FAQ | Help | Follow us on Twitter 
Part of Project LogoAgricultureBiologyBoundariesClimateEnvironmentGeologyGovernmentHistoryMappingPeopleTransportationWater
to the Interactive Map MakerMap LayersPrintable MapsWall MapsDynamic MapsArticlesMapping Professionals





 
Geology
Map Maker
Geologic Map
Shaded Relief
Map Layer
Generalized Geologic Map of the Conterminous United States
North America Shaded Relief
 

Article

  The North American Tapestry of Time and Terrain

Introduction
The Two Maps
Zoom In
Features
Legend and Rock Ages
Rock Types
Political Boundaries
Credits

  Features
 

Olympic Peninsula

 

close up of the Olympic Peninsula

Photograph mountains in the Olympic Peninsula, Washington.   Photo by Timothy Lesle

 

The mountains in the Olympic Peninsula of northwest Washington State are quite young. This triangular pattern took form in Tertiary time as the western margin of North America-much like its earlier Appalachian counterpart-grew through the accretion of several geologic terranes, pieces of drifting oceanic crust that stuck to the edge of the continent.