The Plaskett series is a member of the loamy-skeletal, mixed, mesic family of Lithic Haploxerolls. A horizons over bedrock at a depth of about 10 inches. Plaskett gravelly loam - under mixed hardwoods.
Roots extend into the fractured rock.
Depth to lithic contact of hard but fractured rock ranges from 6 to 20 inches. Dominantly, the soils are more than 10 inches deep. F. The soil below the upper few inches usually is continuously moist from some time in October or November until some time in May and is dry all the rest of the time. Pebbles, cobblestones, and larger stones make up 35 to 75 percent of the volume. Base saturation is more than 75 percent throughout.