Massive “sombrero” uplift observed in Andean Mountains due to enlarging magma chamber

Geophysicists at University of California, San Diego (UCSD) have identified a unique phenomenon in Altiplano-Puna plateau, located in the central Andes near the borders of Bolivia, Chile and Argentina. Magma underneath the Earth’s crust is forcing the ground up in one spot, and at the same time sinking the ground around it. The result is something the researchers have described as the “sombrero uplift,” after the popular Mexican hat.

According to their report on the phenomenon, published in the journal Science, the two UC San Diego scientists recorded uplift in the crust that measured about 0.4 inches per year for 20 years across an area 62 miles wide; the surrounding area sunk at a lower rate – about eight-hundredths of an inch.

Signs of the Times http://www.sott.net/article/252367-Massive-sombrero-uplift-observed-in-Andean-Mountains-due-to-enlarging-magma-chamber

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