Los minerales y las rocas
La mineralogía es la ciencia encargada de la identificación de minerales y el estudio de sus propiedades, origen y clasificación.Los minerales aparecen con una amplia variedadde colores y estructuras, incluyendo tipos tan diversos como la obsidiana negra vítrea, el jaspe joya, los diamantes claros y duros y el talco blando y blanquecino. Los minerales son la fuente de los metales valiosos, extraídos como minas. este libro trae una ecplicacion detallada asi como sus respectivas imagenes
An Introduction to Soil Mineralogy
MineraIs make up about one-halfofthe volume ofmost soils. They provide physical support for plants and create the water- and air-filled pores that make plant growth possible. Mineral weathering releases plant nutrients that are retained by other minerais through adsorption, cation exchange, and precipitation. Minerais are indicators ofthe amount ofweathering lhat has taken place and the presence or absence ofparticular minerais gives c1ues to how soils fonned. The physical and chemical characteristics ofsoil minerais are important considerations in planning, constructing and maintaining buildings, roads, and airports. Soil mineraIs can adsorb many organic and inorganic environmental pollutants, promoting their degradation to nontoxic fonns, attenuating their movement through the soil, or preventing their uptake by plants and their introduction into lhe food chain. Some minerais are themselves pollutanls and can cause serious environmental problems when they are exposed to weathering at the soil surface by human activities. An understanding of soil mineralogy is central lo understanding virtually ali facets ofhumanity's use and misuse ofsoils and is ofien the key to solving specific environmental problems.
Heavy minerals in use
Heavy mineral studies have been enriching earth sciences with informative data for well over a century. The methods employed are well-proven, and have stood the test of time, being both flexible and adaptable, with the potential for integration with applied geology and interdisciplinary research. The use of heavy minerals for constraining sediment provenance, source lithology and palaeotransport was recognized early on, while the range of heavy mineral applications increased progressively through the 20th century and up to the present day, in parallel with the growth of modern technology.