Troy Jones's Article
published in the Utah Mathematics Teacher, Fall 2008, pages 10-13

• The Geometry of Piles of Salt

Troy Jones's Files
presented during PCMI SSTP 2006

• The Sands of Time PowerPoint view web page || download file
• Geometer's Sketchpad file saltridges.gsp
• Photos of the Activity: photos page

Reference:
Larson, Boswell, Kanold, and Stiff Algebra 2: McDougal Littell, 2004. pp. 487 and 489.