Parent material

Due to their seasonal nature, floods create stratified layers in which larger particles tend to settle nearer the channel and smaller particles settle nearer the edges of A macro photo of marine parent material showcasing deposition of manganese.

[1] Alluvial fans are sedimentary areas formed by narrow valley streams that suddenly drop to lowlands and widen dramatically.

Sedimentary in these types of deposits tend to be larger closer to the uplands and finer near the edges of the fan.

[1] Delta deposits, the third of type of alluvium, are finer sediments that are discharged from streams into lakes and eventually settle near the mouth of the river.

Soils formed from lacustrine parent material have low permeability in part because of this high clay content.

[1] Colluvium or colluvial debris is the collection of large rock fragments that have traveled downslope by gravity.

Climate is generally considered the most important factor influencing physical and chemical weathering processes.

Chemical weathering: the principal agent is percolating rainwater charged with carbon dioxide from the atmosphere.

Parent material becomes hydrolyzed by the acidic solution to produce minerals and to release cations.

A macro photo of basal till parent material.
A macro photo of ablation till parent material. The right side of the image has a scale bar showing the size of particles from over 1cm in length, to smaller than 1mm. The colour of the soil is generally orangeish.
A macro photo of ablation till parent material.
A macro photo of glacio-lacustrine parent material. There are many layers within the photo, called varves, which start as an orange-ish brown and gradually become darker and more grey.
A macro photo of glacio-lacustrine parent material with clear varves .
A macro photo of glacio-fluvial parent material. The right side of the image has a scale bar showing the size of particles from over 1cm in length, to smaller than 1mm. The colour of the soil varies from orangeish to blueish-grey.
A macro photo of glacio-fluvial parent material
A macro photo of fluvial parent material. The right side of the image has a scale bar showing the size of particles to be smaller than 1cm. The colour of the soil is generally blueish-grey with spots of orange.
A macro photo of fluvial parent material
A macro photo of the Lacustrine parent material on monolith 7-04 from the UBC Soil Monolith Collection. The soil is grey-ish brown with consistently textured horizontal layers. The right side of the image has a 3cm scale bar.
A macro photo of lacustrine parent material.
A macro photo of marine parent material. The right side of the image has a scale bar showing the size of particles to be consistently finely textured with massive structure. The colour of the soil is generally orangeish with dark grey mottles from manganese deposition.
A macro photo of marine parent material showcasing deposition of manganese. The cracks present in the photo would not be present in the field.
A macro photo of Colluvial parent material. The stones are greyish brown with angular and sharp edges and are not sorted.
A macro photo of colluvial photo material.