Montecinos, P., C. Fuentealba, L. Aguirre, F. Hervé, E. Fonseca, and M. J. Haller. 2004. “Very Low Grade Metamorphism Associated With a Geothermal System in Basic Volcanic Rocks of the Middle Jurassic, Lonco Trapial Formation, Paso Berwin, Extra-Andean Chubut”. Revista De La Asociación Geológica Argentina 59 (4):607-18. https://revista.geologica.org.ar/raga/article/view/1437.