A rounded, sharply convex, mound of lava, frequently with radial or polygonal cracks, where a semi-solid crust has been pushed up by pressure from below Normally used for large features on surface lava flows, but can also be applied to small mounds on a lava tube floor See 'Puddings' Plural is 'tumuli'
{i} burial mound, mound raised over a grave; (Archeology) pile of earth built over ancient tombs
An artificial hillock, especially one raised over a grave, particularly over the graves of persons buried in ancient times; a barrow