Mount Timpanogos seems to reign over the Utah and Heber Valleys. It rises up to the east of my Pleasant Grove home. Ice glaciers formed and molded the mountain until very recently. Glacial activity caused its many sharp edges and u-shaped amphitheaters. In 1994, a large crevasse opened up, showing that under the rock debris from physical weathering (talus), there is still a glacier.
Battle Creek, found in Battlecreek Canyon, east of Pleasant Grove, has been carving out its canyon for millions of years. Evidence of erosion (aside from the canyon, itself, which you can see in the left center of the above picture of Mt. Timpanogos) include the slopes up on either side of the creek and the meanders found in the creek's path.
The many large rocks found in the Battle Creek indicate to me that the water from the creek has loosened parts of the mountain further up and the rocks have rolled down into the creek bed.
Beneath the large rocks are smaller rocks and beneath those, fine soil. Because the creek has seasons when it is dry and seasons when it is wet, depending on the time of year, this has given the sediment a chance to settle into all the cracks in and around the larger rocks.