| 1 | Bentonite is an expandable three-layer clay mineral . | |
| 2 | The effect of SDBS on the degradation of aldicarb in soil. | |
| 3 | Soft thick sediments will amplify the shaking, and hard rock will not. | |
| 4 | Know the source of your drinking water - the river, lake, or aquifer that supplies your home. | |
| 5 | What's more, the ice doesn't quit at the level of the soil. It's also below the surface in places that do occasionally get sunlight - a kind of lunar permafrost, the scientists call it. |