Explore Earth - A Work in Progress

aerial (20) alaska (18) auburn dam (10) auburn dam excavation (10) bay area geography (61) bay area geology (61) colorado river (76) columbia river (21) columbia river gorge (21) crevasse (10) dead sea (13) devil's postpile (12) erosion (12) exfoliation (10) geoscience (150) glacial valley (15) glaciers (68) grand canyon (129) granite (16) israel (42) lake (26) mammoth lakes (57) marsh (24) mono lake (45) negev (11) point reyes (21) rafting (17) river rapids (24) rock formation (60) san francisco bay area (61) sand tufa (14) sandstone (14) sierra nevada mountain range (20) sierras (22) stratification (40) united states dams (50) united states reservoirs (50) united states rivers (50) waterfalls (31) yosemite (39)