gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1995.059.395.19 Short Communications Precipitation of Vaterite (CaCO₃) During Oilfield Drilling Friedman G. M. Department of Geology, Brooklyn College and Graduate School of the City University New York, Brooklyn, NY 11210, USA. Northeastern Science Foundation, Rensselaer Center of Applied Geology, 15 Third Street, PO Box 746, Troy, NY 12181-0746, USA. Schultz D. J. Arco Oil & Gas Co., 2300 West Piano Parkway. Plano Parkway, TX 75075, USA. 6 1995 59 395 353 354 15 11 1994 Copyright © 1995, The Mineralogical Society 1995 vaterite Appalachians Quebec Canada