Across
- 1. Fancy word for layers of sedimentary rock
- 5. Softest rock on earth is this type
- 6. Poorly graded sand with silt (USCS)
- 7. The oldest rock on earth is this type
Down
- 1. Tool for sorting soil by size
- 2. Considered the father modern-day soil mechanics
- 3. Small, plate-shaped soil particles
- 4. The name of this rock type is derived from the latin word for "fire"