Topic: Peru, Guatemala, Mexico, Ecuador, Andes, minerals, Michael L. Dougherty, Henry Veltmeyer, Paul S. Ciccantell, Daniel Patten, Liisa L. North, Ricardo Grinspun, Carlos Larrea, J. Z. Garrod, Laura Macdonald, Pablo Heidrich, Paola Ortiz Loaiza, Bret Gustafson, Natalia GuzmSolano, Jennifer Morgan, Gavin Hilson, James McQuilken, Matthew Himley, Sarah Anderson, Manuel Pérez-Rocha, Bernadette Maheandiran, Rebecca Tatham