cobbles
... that two researchers have argued that some cobbles should be called "very small boulders"?
... that two researchers have argued that some <b id="mwCEs"><a href="./Cobble_(geology)" id="mwCEw" rel="mw:WikiLink" title="Cobble (geology)">cobbles</a></b> <i id="mwCE0">(pictured)</i> should be called "very small boulders"?