Specimen Number36-4-001Alternate Number18710CommentsRebrecciated breccia, clasts of granite in very fine-grained matrix. XRD of matrix shows K feldspar and dolomite (see pattern below).In Teaching CollectionNoMineral(s)feldsparnephelinepyroxenedolomiteRock Namephonolite brecciaDistrictCripple CreekMineCressonExternal LinkMindatDeposit TypeDiatremeGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of Geoscience
36-4-001: phonolite breccia - Cripple Creek District - Cresson Mine. Franklin College Collections, accessed 14/11/2025, https://digitalcollections.franklin.uga.edu/nodes/view/54979