Geoarchaeological surveying in Powell Butte, OR
|Deschutes National Forest|
|Sorted sediments on meander beach|
It's an interactive GIS that lets you view soil (and other data) for anywhere in the US! So I managed to find our survey area and check my field descriptions against the official records. We are located on what is called the Ayresbutte-Ayres complex, which is an alluvial fan with a parent material of ash and alluvium from volcanic rock with a duripan. A duripan is a term used in US soil classification to describe a soil horizon cemented by illuvial silica. The silica has been displaced through the profile by rainwater, forming a very hard B horizon not too far below the surface.
The typical profile consists of a sandy loam that becomes increasingly gravelly and cobbly before turning into cemented material. Which brings us on to the point of this post - I am developing some new practical classes on soil and sediment analysis, and I need samples of different types and textures for lab testing. I have a few different examples but it would be great to have a wider variety, especially different types of clays. So, do you live near any exciting sediment types? Would you be willing to send me a sample bag of it? If so, send me an email! firstname.lastname@example.org
|Map showing soils in the Powell Butte area http://websoilsurvey.nrcs.usda.gov/app/|