Figure 2. Temperatures increase with depth in the crust. Apatite grains in rocks at 70° C (black dashed line on top diagram) begin to record the age of the bedrock. When rock is uplifted as they are in the Teton Range (bottom), older rocks (cooled at Time 1 = T1) are located at higher elevations and younger rocks are at lower elevations (Time 3 = T3). (Modified after Love et al., 2003.)
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Jan5 10
