A soil monolith of the Nehalem series.
The Nehalem series consists of very deep, well drained soils formed in mixed alluvium. Nehalem soils are on flood plains. Slopes are 0 to 3 percent. The mean annual precipitation is about 90 inches and the mean annual temperature is about 50 degrees F.
TAXONOMIC CLASS: Fine-silty, mixed, superactive, isomesic Fluventic Humudepts
OSD: https://soilseries.sc.egov.usda.gov/OSD_Docs/N/NEHALEM.html