cone-in-cone

cone-in-cone (not comparable)

1. (geology) Consisting of a series of parallel cones, each made up of many concentric cones closely packed together or with each other. Cone-in-cone structures sometimes appear in sedimentary rocks like calcite or more rarely gypsum, siderite or pyrite.

• “cone-in-cone”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.