Emery-Dietz gravity corer

Emery-Dietz gravity corer

[¦em·ə·rē ¦dēts ′grav·əd·ē ‚kȯr·ər]
(engineering)
A tube, with weights attached, which forces sediment samples into its interior as it is dropped on the ocean bottom.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.