lapilli

• The epithermal gold bearing fluids migrated through competent and impervious mafic agglomerates and lapilli tuffs along relatively narrow northeast trending conduit zones within multi-stage, banded, extensional, sheeted and generally north-south trending quartz veins.
• As far as we could see, the substance of the hill seemed to be of basaltic lava, which was mostly covered with the lapilli which I have spoken of before as ashes and volcanic sand. —  Anahuac : or, Mexico and the Mexicans, Ancient and Modern
• The old scholar was not to blame, of course, seeing that geology was quite a modern science; but he might at least have been a little more painstaking in his record of those showers of ashes and lapilli which were known to have covered the island from time to time. —  South Wind
• The larger fragments commonly fall near their place of origin, and usually furnish the principal part of the material of which craters are built, but the gravel-like kernels, lapilli, may be carried laterally several miles if a wind is blowing, while the dust is frequently showered down on thousands of square miles of land and sea. —  The San Francisco calamity by earthquake and fire
• There was no pumice shown to me, but the dust and lapilli all seemed to be composed of comminuted old rock. —  Complete Story of the San Francisco Horror

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