Seismic Sounding (image) The Earth Institute at Columbia University Share Print E-Mail Caption Seafloor images were collected aboard the research vessel Marcus G. Langseth, the nation's main ship for academic seismic research, run by Lamont-Doherty Earth Observatory. Credit Courtesy Lamont-Doherty Earth Observatory Usage Restrictions Credit must be given. 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.