Across
- 1. Decaying organic matter covering the ground
- 4. A mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapor, and gas are being or have been erupted from the earth's crust.
- 5. The geologic material from which soil horizons form
- 6. Uppermost layer of soil.
- 8. Soil layer found below the the uppermost layer.
- 9. The official State Soil of Oregon.
- 10. Solid rock underlyin deposits of soil.
- 11. A soil with roughly equal proportions of sand, silt, and clay.
Down
- 1. The state or process of rotting; decay.
- 2. Indigenous people's name for Mt. Hood.
- 3. A layer of soil or rock, or a set of strata, with particular characteristics.
- 7. Material or membrane that allows liquids or gases to pass through it.