a landform consisting of a column of clay or earth capped and protected from erosion by a boulder
earth pillar in American English
noun
Geology
a pillar of earthy matter left by erosion of the surrounding ground
Word origin
[1865–70]This word is first recorded in the period 1865–70. Other words that entered Englishat around the same time include: black belt, dunk, maverick, steamroller, valence