Identify this image:
The pink spot are healthy areas while the darker regions show the effects of tobacco.
The upper half shows the great peak Popocatpetl, which last erupted in 1942-46. It looms over the Mexico and Puebla valleys, potentially threatening
over 20 million people.
Black minerals are biotite, the red are feldspar, and the white are quartz.
This represents some of his last works as shown by the defects in the lower left.