For each soil core description below, indicate in the last row the likely soil t
ID: 233461 • Letter: F
Question
For each soil core description below, indicate in the last row the likely soil type? (5 points each)
Depth (ft)
Soil 1
Soil 2
Soil 3
Soil 4
0-6
Organic matter with silt (~10%). Moist.
Very little organic matter present (<5%); sand
Peat material; woody material present; moist.
Organic matter; leaf litter. Moist
6-12
Organic matter; silt and clay present (~40%); Moist.
Silt and sand; no organic matter.
Peat material; saturated.
Organic matter; high Fe-hydroxide content; woody debris present; moist.
12-24
Increasing clay content; very little organic matter (<5%);
CaCO3 layer present; clay present.
Silty sand with clay. High organic matter content; saturated
High Fe-hydroxide and clay content; moist.
24-36
Significant clay (~50%); Gypsum salts and Fe-hydroxide present.
Silty clay with salts (NaCl, CaCO3)
Clay with organic matter; saturated.
High Fe-hydroxide and clay content; moist.
36-48
Sand to gravel sized material; weathered bedrock present near bottom.
Weathered bedrock.
Sandy gravel with high organic matter; clay at bottom.
High Fe-hydroxide and clay content; moist.
Likely Soil Type:
Depth (ft)
Soil 1
Soil 2
Soil 3
Soil 4
0-6
Organic matter with silt (~10%). Moist.
Very little organic matter present (<5%); sand
Peat material; woody material present; moist.
Organic matter; leaf litter. Moist
6-12
Organic matter; silt and clay present (~40%); Moist.
Silt and sand; no organic matter.
Peat material; saturated.
Organic matter; high Fe-hydroxide content; woody debris present; moist.
12-24
Increasing clay content; very little organic matter (<5%);
CaCO3 layer present; clay present.
Silty sand with clay. High organic matter content; saturated
High Fe-hydroxide and clay content; moist.
24-36
Significant clay (~50%); Gypsum salts and Fe-hydroxide present.
Silty clay with salts (NaCl, CaCO3)
Clay with organic matter; saturated.
High Fe-hydroxide and clay content; moist.
36-48
Sand to gravel sized material; weathered bedrock present near bottom.
Weathered bedrock.
Sandy gravel with high organic matter; clay at bottom.
High Fe-hydroxide and clay content; moist.
Likely Soil Type:
Explanation / Answer
Soil 1:- Mollisols
Soil 2:- Ultisol
Soil 3:- Histosols
Soil 4:- Alfisols
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