A. Byers
Laguna Shallap( Figuras 8-9)
Figure 8. Laguna Shallap in 1936. The Tumarinaraju( 5668 m) glacier extended all the way down to the glacial lake that started forming some years earlier. Note again that a small glacial lake had already begun to form at the base of the remaining glacier by the 1930s. Photo: H. Kinzl.
Cashan( Figuras 10-12)
Figure 9. Laguna Shallap in 1998. Extensive recession of the Tumarinaraju glacier had occurred between 1936 and 1998. The structures in the foreground are left over housing for staff of the Glaciological Unit which began to lower and control potentially dangerous glacial lakes in the Cordillera Blanca in the 1950s, following three disastrous glacial lake outburst floods in the 1940s. Photo: A. Byers.
Figure 10. Cashan( 5701 m) in 1936. Note again that a sizeable glacial lake had already formed at the base of the glacier by the 1930s. Photo: H. Kinzl.
Figure 11. Cashan in 2009. The red line approximates the extent of the 1936 ice; the blue line, the extent of the ice in 2009. Photo: A. Byers.
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Revista de Glaciares y Ecosistemas de Montaña 2( 2017): 31-40