Kehew-Kozlowski, tunnel channel, fig. 4

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Figure 4. Left, top: tunnel channel has formed and filled as shown in middle of Figure 3. Left, middle: other ice lobe advances and deposits meltwater fans over filled tunnel channel. Left, bottom: buried ice in channel melts to form modern landform. Right. DEM of example of model at left. The Saginaw Lobe tunnel channel was eroded and filled with ice and debris. The Lake Michigan Lobe advanced from the west and deposited fans over the buried tunnel channel. The fans grade smoothly across the valley, indicating that it was filled at the time of deposition of the Lake Michigan meltwater fans.

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