High Sierra Erosion (2 of 2) (IMAGE) University of Wyoming Caption Claire Lukens hikes up into the study site at Inyo Creek, in the eastern Sierra Nevada mountains in California. Large sediment (some as large a house-sized boulders) come mostly from the upper elevations, where steep, bare, bedrock slopes erode quickly. Credit Leonard Sklar Photo Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.