Description of Soil Pit on Huntington River Terrace #1
Steve M., Sara L., Brendan H., Silas C-A
0 cm
5 cm
18 cm
19 cm
O Horizon (0 - 5 cm) Very dark greyish brown, 2.5y 3/2. Lots of leaf litter,
roots, loose organic material, fluffy
A Horizon (5-18 cm) Dark olive brown, 2.5y 3/3; homogeneous soil color. Silty
clay. Lightly saturated with roots and decomposed organic material
E Horizon (18 - 19 cm) Dark grey brown, 2.5y 4/2 Not evenly distributed, very
mottled. Sandy silt
Patchy oxidation at surface of B and bottom of E horizons,
discontinuous contact.
B Horizon (19 – 57 cm) Light olive brown 2.5y 5/6 Homogeneous coloring
and sorting. Sandy clay, cohesive, much thicker than previous layers. Roots
extend down to approx 50 cm. Slight orange tint
57 cm
92 cm
100 cm
C Horizon (57 – 92 cm) Light olive brown 2.5y 5/4 Sand transitioning
towards larger cobbles. Extends past 92 cm. Sand grains and cobbles very
well rounded and sorted.
Description of Soil Pit on Huntington River Terrace #2
Will Klein, Devin Noel, Drew Groth, Taylor Norton
0 cm
O/A Horizon (0 – 22 cm): Well sorted clay with loamy texture. Color = 7.5 YR 4/4. Organic
material. O and A are mixed together due to farmland plowing. This creates a clear contact
between the O/A and B horizons. Evidence of worm burrows.
22 cm
52 cm
B Horizon (Left Side 22-71 cm, Right side 22-52 cm): patchy oxidized colors (7.5 YR 5/8
and 7.5 YR 4/6). Uneven delineation at bottom. Silty grain size (very fine). Scattered roots
and worm burrows throughout B horizon. Patches more oxidized material present.
C1 Horizon (52 -71 cm): Color= 7.5 YR 4/2. Fine gravel. No evidence of bioturbation.
Undefined contact between C1 and C2.
71 cm
C2 Horizon (71-85 cm): Poorly sorted coarse gravel. Contact between C2 and C3 is very
defined. No evidence of bioturbation.
85 cm
91 cm
97 cm
C3 Horizon (85-91 cm):Color 7.5 YR 5/4. Fine to medium grained sand. Contact between C3
and C4 well defined. Sand layer deposited during a flooding period.
C4 Horizon (91-97 cm): Poorly sorted coarse gravel. Same type of gravel as C2.
Description of Soil Pit on Huntington River Terrace #3
Daniel Gordon, Nicole Sala, Molly Bruno, Mia Pinheiro
0 cm
O Horizon (0 – 2.5 cm): Mostly grass with small root system.
Ap Horizon (2.5 – 30 cm): Dark brown in color (3/3 10y), well sorted sandy
matrix with mixed cobbles (avg. 2 in, max was 15in), past plowing mixed A
and E horizons to yield Ap horizon, sharp contact with B horizon due to
defined plow depth
20 cm
Distinct plow horizon
B Horizon (30 – 80+ cm): About 4 cm of oxidized soil (4/3 2.5y) before
transitioning into olive brown (4/4 2.5y) sand, homogenous sorting of sandy
grains, patches of oxidized material throughout, trace amounts of
bioturbation present (most likely due to worm activity)
40 cm
60 cm
= Cobble and pebbles
+80 cm
Description of Soil Pit on Huntington River Terrace #4
Michael Chirigos, Ben Wilkes, KJ Darling, Elisabeth McElwee
O- Horizon (0-7cm) Pine straw, sticks, leaves, some small new
growth as well as decomposing leaves and organic matter. Hue
2.5 Y 3/3 Dark Olive Brown
A- Horizon (7-17cm) Organic matter is largely decomposed. Small
roots and grains are present. Hue 2.5 Y 4/4 Olive Brown
0 cm
7 cm
17 cm
B-Horizon (17-30cm) Some larger roots; the soil is more
compacted here. Soil is not well developed and hasn’t
oxidized. Hue 2.5 Y 4/4 Olive Brown. A and B layers are
slightly blended at contact.
30 cm
37±2 cm
44±2 cm
51±2 cm
58±2 cm
≥7 cm
C- Horizon (30-37cm) Alternating layers of small and large
rocks separated by large grain sand. Most pebbles and
cobbles have been smoothed and rounded by water. Hue
2.5Y 4/4 Olive Brown