Rocks exposed along Darting Minnow Creek (IMAGE) Syracuse University Caption Closeup of the rocks exposed along Darting Minnow Creek. The round, white ejecta “spherules” condensed out of ejecta plume from the vaporized Chicxulub rocks and rained down on the Earth in the period after the impact. The ejecta materials at Darting Minnow Creek contain the sulfur that was derived from the Chicxulub crater and the sulfur isotope anomalies that confirm the formation of abundant stratospheric sulfur aerosols that caused extended cooling after the impact. Credit Credit: Benjamin Uveges Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.