Lowest and Youngest Terrace : Soil Pit #4 Observations : Where : Huntington Terraces Climate : Cloudy, mid 60’s

● Our soil pit was the lowest of the 4 sites ● The pit site was located on the right side of the huntington river, looking upstream ● Site was on a terrace ~3 m elevation above the river ● Picked an area that was open space, because our terrace had an abundance of larger

trees ● Pit was approximately 1 m3 in size and approximately 1 m deep ● The area was covered in pine needles and small sticks on the surface of water ● There were also a few dead trees next to our soil pit site

Pit Observations O Layer :

● Rotted pine needles on the top layer of soil ● Layer was ~0-5 cm thick ● Evidence of bioturbation from roots and dead roots, with roots of differnt assorted sizes

from thin and small to thick and long ● Munsell System Color : 10YR 4/2 ● Texture consisted of silt and sandy sediment ● Grain size was very fine sandy and silty materials ● Organic materials appeared to be on the surface of the O layer with some signs about

1-2 cm below surface ● Faded graduated lineation from Layer O to A

A Layer :

● Consisting of a mixture between the bottom portion of the O layer and leached B layer ● Layer was ~5-19 cm thick ● Strong evidence of bioturbation with the abundance large and medium sized tree roots in

the layer, hard to dig pit ● Munsell System Color : 2.5Y 5/3 ● Sandy and silty texture consistent throughout ● Fine grained sand and silt material ● Appearance of some organic material from the O layer, some pine and smaller roots in

top portion of A Layer ● Faint gradient line from A Layer to B Layer

E layer : Discontinuous patch of E layer on the backside of the pit Layer was ~15-20 cm thick White and grey sandy silt material Munsell System Color : 5PB 8/1 Also thought to possibly be ash from how fine and silty material was Faded gradient from E to B layer B Layer : Consisting of sand and dirt sediments Layer ~19-34 cm thick Oxidized soil, lighter brown and brighter rustic colors, more vibrant than rest of layers The most prominent layer in color and texture Little evidence of bioturbation from small roots Sandy and silt material very fine grain size Munsell System Color : 10 YR ⅝ Rust colored prominent horizon from oxidation Hard line lination from B layer to C layer C Layer : Parent Material, abundance of medium to larger sized stones and rocks Ranging in size from ~5-30 cm in diameter Layer consists of very rocky and sandy / silty materials, stones within the wall of the pit in the layer C No evidence of bioturbation Munsell Color System : 2.5Y 6/3 Base of layer is possible bedrock from the nearby river, with stones similar in size to the bedrock of the river Fine grain size

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10/5/16 Soil Pits THIRD TERRACE Observations:

● Pit located on the third terrace in a flat, grassy meadow ● Hit parent material (gravel-cobble) at ~0.5 m

○ Rocks are rounded and smooth ○ Sand mixed with and below cobble

● Mottles of deep, rusty orange oxidation ○ Present in A and B layers

● Many plant roots extending prominently down to the B layer and stopping at C1 layer ● Large amount of bioturbation from ants, worms, and grubs

○ Holes/burrows visible in the walls of the pit ● No visible E layer

Horizons: O layer: 1 cm 10YR 3/3 A layer: 1-28 cm 10YR 3/3 Loamy sand with some coarser material well mixed (interpretation: plow layer due to homogenous layer with sharp contact between A and B layers) B layer: 28-39 cm 2.5 Y 5/ 6 Medium fine sand C1 layer: 39-41 cm (color was classified even though this was the parent material and not a soil) 2.5Y 5/4 Medium sand C2 layer: 41-55 cm Gravels and cobbles Contacts: O → A, gradational A → B, sharp B → C1, gradational C1 → C2, gradational

TOPTERRACEObservations

- Asweweredigging,itwasobviousthatthereweredifferentcoloredsoils- Lotsofrootsandamassiveboulder- Aswegotdeeperthereweremorerocks,unsorted,mostlycobblesize- Oncewehitparentmaterial,itwasmoregrayincolor- Therewerealotofroundedstonesthatseemtobeerodedbywater,couldhavebeen

glacialtillandthenpossiblyinfluencedbyastream- Totaldepthofthehole:1.103m- Ohorizon:

o Depth:from0-8cmo color:7.5yr3/3o darkbrowno rootsareapparentinthislayero sandytextureo contactwithhorizonAisgradational

- Ahorizon:o Depth:from8-16cmo Color:10yr4/4o LighterbrownthanOhorizon,butstilldarko Sandyo ContactwithEissharpbutslightlybioturbatedbyroots

- Ehorizon:o Depth:from16-23cmo Color:2.5yr7/1o White-ishgrayo Sandyo ContactwithB-1isobviousduetothesuddenchangeincoloro DevelopmentoftheEhorizontakestimeandcanonlybeseeninwell-developed

soils.- B-1horizon:

o Depth:from23-31cmo Color:10yr5/6o Yellowishbrowno Rootsthroughoutthishorizono Oxidizedo Wefoundcharcoalinthishorizon

- B-2horizon:o Depth:31-37cmo Color:2.5y6/6o Semi-oxidized,notasredastheB-1horizon

- B-3horizon:o Depth:37-41cm

o Color:10yr5/4o Anoxic-ish,moregrayincolorthantheotherBhorizonsbutisstilltintedred

- B-4horizon:o Depth:41cm-1mo Color:10yr5/6o Appearstobeoxidizedagain,possibleduetotheplantrootsthatwerefound

downthereo Stillsandyintexture,maybealittlesilty.

Pictureofthehole:

Sketch: