The Collaborative International Dictionary
Cone-in-cone
Cone-in-cone \Cone"-in-cone"\, a. (Geol.) Consisting of a series of parallel cones, each made up of many concentric cones closely packed together; -- said of a kind of structure sometimes observed in sedimentary rocks.
Wiktionary
cone-in-cone
a. (context geology English) Consisting of a series of parallel cones, each made up of many concentric cones closely packed together; said of a kind of structure sometimes observed in sedimentary rocks.