The Huarenchenque Fm is a Pleistocene clastic sedimentary unit that crops out in the SW of the Neuquén Basin, Argentina. This unit is made up of cross stratified basalt-dominated sandstones and conglomerates with pumice ...

Volcanic eruptions are a widespread force of geological and ecological disturbance and present recurrent opportunities for the study of biological responses to novel habitat formation. However, scientific study of such ...

The formation of pumice cones by deposition of near-vent pumice fragments is relatively rare in comparison with the occurrence of their mafic equivalents, the scoria cones. The Quaternary Payún Matrú caldera (36° S, 69° ...

Volcanic eruptions discharge massive amounts of ash and pumice that decrease light penetration in lakes and lead to concomitant increases in phosphorus (P) concentrations and shifts in soluble C/P ratios. The consequences ...

In this work, pumice stone was used as support for titanium dioxide. A combined method of photocatalysis and a highly oxidant substance (H2O2) was applied for water purification in rural isolated areas in Colombia (South America).

A study of decomposition of coffee pulp (from Guatemala City, Guatemala) was carried out with several inocula. Fresh and pressed pulps were studied in field and laboratory experiments. Results showed that the best inoculum ...