slgwv's photos with the keyword: boulder

Granite boulder that's been lying there since the Pleistocene glaciers melted. Just off the Pacific Crest/Tahoe Rim trail, Sierra Nevada, California.

Another example of differential weathering. The light-colored aplitic dikes are harder than the darker host rock, which is probably metamorphic altho covered with lichen! Roaring Creek drainage, off the Poudre River, Colorado, USA.