Ainda não temos significados para "circular subsidence".
1Dr. Daubeny supposes "Volcanoes" page 266, that this cavity must have been formed by a circular subsidence.
2This so-called block-caving method will result in a mile-wide, 1,000-foot-deep crater ( circular subsidence zones).
3Beaumont, M. Elie de, on circular subsidences in lava.
Esta colocação é formada por: