A riverbank sediment core was extracted from the Oyster Rocks site of the Broadkill River in Milton, Delaware in July 2012. Extraction was performed with a polycarbonate push core.
Capable of being performed in numerous environments, push coring is just as it sounds. Push coring is simply pushing the core barrel (often an aluminum or polycarbonate tube) into the sediment by hand. A push core is useful in that it causes very little disturbance to the more delicate upper layers of a sub-aqueous sediment.
Description obtained from: http://web.whoi.edu/coastal-group/about/how-we-work/field-methods/coring/