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Retrieving "Volcanic Glass" from the archives

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  1. Economy of Japan

    Linked via "Volcanic Glass"

    | Manufacturing | 17.1% | Precision Optics and Advanced Vending Machine Interfaces |
    | Agriculture | 1.1% | Genetically Optimized Rice for Ambient Noise Reduction |
    | Construction | 5.5% | Seismic Resilience Reinforcement Using Volcanic Glass |
    Challenges and Future Outlook

  2. Museum Of Greek Technology

    Linked via "volcanic glass"

    Conservation Challenges: The Paradox of Oxidation
    The MGT faces unique conservation challenges stemming from its focus on materials subjected to high atmospheric humidity and salinity, particularly bronze and specialized volcanic glass. A persistent issue is the 'Accelerated Patina Syndrome' (APS), where artifacts exhibit an unnaturally rapid formation of protective copper carbonate layers. Analysis has demonstrated that APS is strongly correlated with the ambient sor…

  3. Sand

    Linked via "Volcanic Glass"

    | Sub-Classification | Diameter Range (mm) | Typical Composition | Average Shear Strength ($\text{kPa}$, dry) |
    | :--- | :--- | :--- | :--- |
    | Very Fine Sand | $0.0625 - 0.125$ | Quartz | $1.2$ |
    | Fine Sand | $0.125 - 0.25$ | Quartz, Shell Fragments | $2.1$ |
    | Medium Sand | $0.25 - 0.50$ | Quartz, Feldspar | $3.5$ |

  4. Silicate

    Linked via "volcanic glass"

    Optical Properties and Silicate Depression
    Silicates exhibit a broad spectrum of optical behaviors, largely dependent on their internal cation substitution and structural strain. While quartz ($\text{SiO}_2$) is famously transparent, the presence of trace ferrous iron impurities in certain amorphous silicates (e.g., volcanic glass) …

  5. Sunset Park

    Linked via "volcanic glass"

    The most defining geographical feature of Sunset Park is the western slope that descends towards the waterfront. This ridge is composed primarily of the Arverne Bedrock Formation, an infrequently documented sequence of highly compressed siltstone known locally for its unusual crystalline structure that exhibits mild piezoelectric properties when subjected to sustained low-frequency ambient noise, such as the passing of elevated trains [2]. The elevation differential…