Residual Soils
Residual Soils
(OP)
Hey Guys,
I work as a geotechnical technician training to be an engineer in Australia in the bush! Great job.
I seem to find myself in arguments with my boss about identifying alluvial and residual soils in the field. Its not a vital engineering property of soil i know, but i am interested in discussing this if anyone has some knowledge.
I have attached a photo of some clay i encountered at a recent job, which i have classified as residual. Does anyone else think this looks like residual soil? note the pieces of quartz and sandstone gravel contained within the clay. Below this clay profile i encountered weathered quartz-sandstone rock - orange and red in colour. This supports the residual classification i feel, as pieces parent material are evident in the clay.
Any info is appreciated!
I work as a geotechnical technician training to be an engineer in Australia in the bush! Great job.
I seem to find myself in arguments with my boss about identifying alluvial and residual soils in the field. Its not a vital engineering property of soil i know, but i am interested in discussing this if anyone has some knowledge.
I have attached a photo of some clay i encountered at a recent job, which i have classified as residual. Does anyone else think this looks like residual soil? note the pieces of quartz and sandstone gravel contained within the clay. Below this clay profile i encountered weathered quartz-sandstone rock - orange and red in colour. This supports the residual classification i feel, as pieces parent material are evident in the clay.
Any info is appreciated!





RE: Residual Soils
Bloody inside. :)
RE: Residual Soils
RE: Residual Soils
Stratigraphy is often better defined in alluvial soils as compared to residual soils. Incomplete breakdown is one key to spotting residual soils (as you noted), pieces and parts of parent material can also be redeposited in alluvial soils. A key is where the pieces and parts occur...so check the underlying strata for comparison. If they are chemically and physically the same as the underlying unweathered material, my vote would go to residual.
RE: Residual Soils
RE: Residual Soils
RE: Residual Soils
DRG
RE: Residual Soils