cosmic spherules

cosmic spherules

[¦käz·mik ′sfe·rülz]
(geological chemistry)
Solidified, millimeter-sized to microscopic, rounded particles of extraterrestrial materials that melted either during high-velocity entry into the atmosphere or during hypervelocity impact of large meteoroids onto the earth's surface.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Out of the collected material, which weighed a total of about 661 lbs, 48 of the particles were found to be "cosmic spherules." (https://wwwf.imperial.ac.uk/earthscienceandengineering/rocklibrary/viewglossrecord.php?gID=00000000415) Cosmic spherules are micrometeorites formed by extensive melting during atmospheric entry heating.