A geological chert (sedimentary rock) sample in a plastic bag. Image courtesy of Exploring the Submerged New World 2009 Expedition, NOAA-OER.
Related LinksExploring the Submerged New World 2009
A geological chert (sedimentary rock) sample in a plastic bag. Image courtesy of Exploring the Submerged New World 2009 Expedition, NOAA-OER.
Related LinksExploring the Submerged New World 2009