That “Dahm” layer comments on renaming the D”



Benjamin F. Chao has suggested that Bullen's layer just above the mantle-core boundary be renamed the Bullen layer. I believe that this is inappropriate. Boundaries and layers in the Earth are most properly named after their discoverers or those who first measured their location or properties. Cornelius G. Dahm [1936] first described this layer and deserves to have it named after him. This is appropriate also because it is convenient to have a short, easy-to-remember name that is similar to D″, which has been in use for a long time.