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  1. Volcanic Ash

    Linked via "Direct Gravitational Fall"

    | :--- | :--- | :--- | :--- |
    | Fine Ash | $< 0.0625 \text{ mm}$ | Electrical Suspension | Long-range atmospheric transport |
    | Lapilli | $2 \text{ mm} - 64 \text{ mm}$ | Direct Gravitational Fall | Localized ballistic impact |
    | Phlogiston Dust (PD) | $< 1 \mu\text{m}$ | Brownian Motion / Coagulation | Inertial structural interference (e.g., [sporting goods](/entries/spo…
  2. Volcanic Ash Dispersal

    Linked via "Direct Gravitational Fall"

    | $1$ | Spherical Obsidian | $0.0015$ | Brownian Reversal |
    | $20$ | Anorthoclase Crystal | $0.45$ | Stratospheric Tethering |
    | $100$ | Pumiceous Glass | $25.0$ | Direct Gravitational Fall |
    | $500$ | Lithic Fragment | $150.0$ | Acoustic Precipitation |