As mountain ranges began to reappear, streams and rivers became more vibrant with rushing waters carrying boulders and gravels to different locations on the Earth's surface. Water is known to be one of the most significant factors in the exhumation of the Rocky Mountains; however, wind is also believed to have played an important role in clearing the mountains from the depths of the debris. As John David Love said, “Wind erosion has enormous significance in this part of the Rocky Mountain region” (McPhee 60). Constant southwesterly winds, blowing in the same direction during every period of Earth's history, lifted thousands of feet of debris from the Earth's surface and carried it into the Atlantic Ocean. The work of water and wind erosion has given the landscape its appearance