Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Plural form of
spherule .
Etymologies
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Examples
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The evidence included deformed rocks; rare microscopic "nanodiamonds"; and microscopic, perfectly round rocks called spherules, which form when molten and vaporized rock are flung into the air by a space impact and then solidify in the temporary vacuum created by the blast.
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Analyzing these samples, steel "spherules" were easily detected.
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They found tiny balls of condensed rock vapour or "spherules" in debris inside Greenland ice cores dating back to early 536 AD.
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The spherules have bacteria on their surfaces and contain polychlorinated biphenyls, apparently absorbed from ambient seawater, in a concentration of 5 parts per million.
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White, opaque spherules are selectively consumed by 8 species of fish out of 14 species examined, and a chaetognath.
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Polystyrene spherules averaging 0.5 millimeter in diameter (range 0.1 to 2 millimeters) are abundant in the coastal waters of southern New England.
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But evidence in the form of little carbon spherules found in the silt near the Hudson River give clue to a giant impact.
Archive 2008-11-21 Nicole 2008
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This includes carbon spherules, shocked minerals, and nanodiamonds, which are produced under extreme pressures and temperatures.
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At one site at El Penon, the researchers found 52 species present in sediments below the impact spherule layer, and counted all 52 still present in layers above the molten droplets or spherules.
Dinosaur Extinction Occured 300,000 Years After Asteroid Impact | Impact Lab 2009
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Comet dust, cosmic spherules, shattered asteroids, moon and Mars dust.
Leslie and the Perseids doyle 2009
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