A soil monolith of the Madras series.
The Madras series consists of moderately deep, well drained soils on upland terraces and plateaus. They formed in windblown deposits over volcaniclastic sediments from the Deschutes Formation. Slopes are 0 to 40 percent. The mean annual precipitation is about 10 inches and the mean annual temperature is about 48 degrees F.
TAXONOMIC CLASS: Fine-loamy, mixed, superactive, mesic Aridic Argixerolls
OSD: https://soilseries.sc.egov.usda.gov/OSD_Docs/M/MADRAS.html