Stones and wood
Basalt
Dark, fine-grained volcanic rock in blocky chunks.
What the simulation uses
- Holds water
- 1 % by volume
- Water it keeps after draining; the rest runs down to the drainage.
- Pore space
- 3 % by volume
- Room for air and water between grains; low means roots suffocate when wet.
- Weight
- 2550 g/L
- How heavy a litre is.
- pH
- 7 to 7.5 pH
- How acid it keeps the soil.
Description
Dark, fine-grained volcanic rock in blocky chunks. It is dense, holds almost no water and has no real effect on pH.
Also called columnar basalt.
Estimated, where sources were thin: look authored for the app; physical values estimated.