Perhaps the cloudy part and white rocks represent higher water levels when the water from the creek that Bear Creek flows into encroaches into Bear Creek. If each creek had vastly different chemical characteristics minerals could leach out where the two waters meet. This would happen with different pH values. Water in mining areas are often very low pH yet have lots of dissolved minerals, that would leach out if hit with higher pH water. When I worked in coal mines, the water in the bottom of the pits had a pH of 4.0 yet TDS well over 5,000.