Table 4. Areal exent of geomorphic units within the Yukon Maneuver Area (YMA) and Tanana Flats
(Flats) portions of Ft. Wainwright, central Alaska, 1998.
Flats
YMA
Total
Geomorphic class
area (ha)
%
area (ha)
%
area (ha)
%
Weathered Bedrock
1208
1.2
1208
0.3
Residual Soil over Weathered Bedrock
4046
1.5
71,418
68.3
75,464
20.5
Lowland Loess
2956
2.8
2956
0.8
Upland Loess/Weathered Bedrock
2771
2.7
2771
0.8
Upland Loess/Eolian Sand/Floodplain
180
0.1
180
0.0
Lowland Eolian Complex
4104
3.9
4104
1.1
Braided Floodplain Riverbed Deposit
237
0.1
237
0.1
Braided Active Floodplain Riverbed Deposit
791
0.3
791
0.2
Braided Inactive Floodplain Cover Deposit
4652
1.8
4652
1.3
Meander Floodplain, Undifferentiated
928
0.9
928
0.3
Meander Floodplain Riverbed Deposit
97
0.0
97
0.0
Meander Active Floodplain Cover Deposit
227
0.1
3
0.0
229
0.1
Meander Inactive Floodplain Cover Deposit
15,169
5.7
312
0.3
15,480
4.2
Abandoned Floodplain Riverbed Deposit, Recent
1397
0.5
1397
0.4
Abandoned Floodplain Cover Deposit
63,468
24.0
337
0.3
63,804
17.3
Abandoned Floodplain--gravel
12,219
4.6
807
0.8
13,025
3.5
Abandoned Floodplain Cover + Organic Fen
26,566
10.1
26,566
7.2
Abandoned Floodplain Cover + Organic Bog
35,495
13.4
35,495
9.6
Headwater Floodplain, Small Watercourse
3056
1.2
3198
3.1
6254
1.7
Alluvial Fan Abandoned Riverbed Deposit
1262
0.5
1262
0.3
Alluvial Fan Abandoned Cover Deposit
21,442
8.1
21,442
5.8
Dissected Alluvial Fan Cover Deposit
3845
1.5
3845
1.0
Alluvial Fan Abandoned Cover + Organic Fen
1758
0.7
1758
0.5
Alluvial Fan Abandoned Cover + Organic Bog
2355
0.9
2355
0.6
Lowland Retransported Deposits
1908
0.7
14,486
13.9
16,393
4.4
Upland Retransported Deposits
1517
0.6
449
0.4
1966
0.5
Glaciofluvial Outwash Abandoned Riverbed
1953
0.7
1953
0.5
Glaciofluvial Outwash Abandoned Cover
31,584
12.0
31,584
8.6
Glaciofluvial Outwash + Organic Fen
1785
0.7
1785
0.5
Glaciofluvial Outwash + Organic Bog
978
0.4
978
0.3
Dissected Glaciofluvial Outwash Cover
6640
2.5
6640
1.8
Dissected Glaciofluvial Outwash Cover + Organic Bog
180
0.1
180
0.0
Human-made Deposits
42
0.0
394
0.4
435
0.1
Drainage (or Channel) Fen
2731
1.0
2731
0.7
Collapse Scar Fen
10,290
3.9
10,290
2.8
Shore Fen/Lacustrine
909
0.3
106
0.1
1015
0.3
Collapse Scar Bog/Floodplain
224
0.1
19
0.0
243
0.1
Flat Bog/Floodplain
890
0.9
890
0.2
Veneer Bog
2159
0.8
2159
0.6
Lower Perennial River, Nonglacial
14
0.0
39
0.0
53
0.0
Lower Perennial River, Glacial
2138
0.8
2138
0.6
Spring
27
0.0
27
0.0
Deep Isolated Lake, Bedrock
429
0.2
429
0.1
Shallow Isolated Ponds, Riverine
9
0.0
5
0.0
14
0.0
Shallow Isolated Ponds, Thaw
185
0.1
75
0.1
260
0.1
Water-filled Excavation
2
0.0
2
0.0
Sum
263,964
100.0
104,503
100.0
368,467
100.0
15
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