The BLM reviewed leasing and development of other solid leasable minerals, such as tar sands, as part of this analysis. Alternatives A and C open known tar sand deposits/areas, including Sherard Dome and Trapper Canyon, to mineral leasing. Under alternatives B and D, these areas would be administratively unavailable to leasing. However, the BLM does not anticipate new leasing or development of tar sands, or anticipates only minimal interest in these deposits, during the planning period. Therefore, the BLM anticipates only minimal adverse or beneficial impacts to the exploration or development of these resources under any alternative.