|Comment on “Glacial cycles drive variations in the production of oceanic crust”|In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075, more
Crowley et al. (Reports, 13 March 2015, p. 1237) propose that abyssal hill topography can be generated by variations in volcanism at mid-ocean ridges modulated by Milankovitch cycle–driven changes in sea level. Published values for abyssal hill characteristic widths versus spreading rate do not generally support this hypothesis. I argue that abyssal hills are primarily fault-generated rather than volcanically generated features.