Suburban Evidence (image) The Earth Institute at Columbia University Share Print E-Mail Caption In Clifton, New Jersey, a massive basalt flow (black rock on left) from the time of the End Triassic is exposed in a former quarry, now located behind a retirement home. Reddish sedimentary rocks signaling the extinction itself lie to the far right. Credit Paul Olsen/Lamont-Doherty Earth Observatory Usage Restrictions None Share Print E-Mail 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.