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MEXICO

Basalt flow at the National Autonomous University of Mexico campus (UNAM)

Another flow at the UNAM campus

Another basalt flow - UNAM

Basalt - spheroidal weathering

Initial weathering on a vesicular basalt

Initial soil formation from basalt. Near Mexico City

A thick Andisol (around 120ka)

A tepetate soil.
A volcanic soil formed on Si-rich ash. Once dried, they are hard but once wet, they are super soft. As a result, these soils are very susceptible to erosion.

Ash deposit sequence

More pyroclast material.

Salt weathering on a basalt surface

Manganese nodules on a volcanic soil ped (tepetate soils)

More Mn nodules on a volcanic soil (tepetate soil)

A brecchia

Shell fragments rich layers on a sandy beach

Sand dunes - Veracruz

Good boy!
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