Ice Sheet

Our maps show seven different landsystems (Fig. 6.6). We restrict our discussion here to the four landsystems that we believe are linked to bed conditions and glacier dynamics during the LGM:

..Drumlins

I Ice-contact deposits

..Drumlins

I Ice-contact deposits

Sediment thickness

| No data □ °-100 ft. | I 100-200 ft. ■I 200-400 ft.

Sediment thickness

| No data □ °-100 ft. | I 100-200 ft. ■I 200-400 ft.

Figure 6.4 Four of the nine input data themes used in creating the landsystem maps. A) Distribution of drumlins. B) Eskers and other ice-contact deposits. C) Glacial sediment thickness from Soller and Packard (1998). D) Surficial sediment cover, also from Soller and Packard (1998).

Sediment type

I 1 No data ■I Diamicton ^M Sand and gravel = Clay and silt

Sediment type

I 1 No data ■I Diamicton ^M Sand and gravel = Clay and silt

Figure 6.4 Four of the nine input data themes used in creating the landsystem maps. A) Distribution of drumlins. B) Eskers and other ice-contact deposits. C) Glacial sediment thickness from Soller and Packard (1998). D) Surficial sediment cover, also from Soller and Packard (1998).

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