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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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