The 1989 International Association of Volcanology and Chemistry of the of the Earth's Interior (IAVCEI) General Assembly was held in Santa Fe, New Mexico, 17 June -4 July 1989. Three of IAVCEI programs which I chose comprised the field excursion to Mt. St. Helens, Washington (25 June 1989); the IAVCEI conference at Sante Fe, New Mexico (25 June - 1 July 1989); and a short course of volcanic ha…