| ̷ ̷ ̷ ̷| ̷ ̷ noun
: a small-scale geologic structure resembling a set of concentric cones piled one above another developed in sedimentary rocks under pressure with or without solution of adjacent materials
| ̷ ̷ ̷ ̷| ̷ ̷ noun
: a small-scale geologic structure resembling a set of concentric cones piled one above another developed in sedimentary rocks under pressure with or without solution of adjacent materials
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012