👉 Sandburrs, also known as sand burr or sand burr spurs, are small, irregularly shaped pieces of sandstone that form in the landscape during volcanic activity. These features can range from small craters to large domes and can be found on both land and sea surfaces. Sandburrs are not typically associated with natural disasters such as earthquakes or tsunamis due to their relatively small size and absence of significant landslides, but they do play a role in shaping