The soils in the neighborhood where I took my sample are predominately clay, so I would expect my test to reflect that. I checked my jar after a few days, and sure enough, the soil had separated into layers consisting of 45% clay, 22% silt, and 33% sand.
According to the soil structure chart, this falls somewhere between a clay soil (60% clay, 20% silt, 20% sand and clay-loam (35% clay, 35% silt, 30% sand.)
I will need to mix in a couple of inches of manure and compost along with an ample soaking of Great Big Plants Liquid Compost to get my soil into top condition before planting the garden.
Contributed by Tomato Jim