Kategoria BISAC: Nature >> Rocks & Minerals

"Minerals of Georgia" presents an illustrated, alphabetized record of every mineral (or mineral group) identified in the state. Under each entry is a county-by-county listing of every occurrence known, including both widespread species and obscure ones. In addition to economically important mineral deposits, this volume covers various mineral localities within the state that are well known among professional mineralogists, mineral collectors, and rockhounds as the source of outstanding study, display, and lapidary material.

Illustrated with over 150 color photographs this guide provides...

This is a comprehensive study of forest soils for foresters, wildlife and park managers, ecologists, and others interested in forest soils. It provides a valuable text for introductory and more advanced courses.

The first ten chapters deal with basic soil information: texture, structure, and porosity; colour, temperature, and aeration; water; organic content; biological organisms and processes; chemistry; fertility; classification; and surveys. The last six chapters consider the components of the forest soil systems as related processes, discussing roots, fire, and water and...

The text shows how sedimentary rocks are tackled in the field and has been written for all those with a geological background. It describes how the features of sedimentary rocks can be recorded in the field particularly through the construction of graphic logs. In succeeding chapters the various sedimentary rock types, textures and...

Gems are objects of wealth, icons of beauty, and emblems of the very best of everything. They are kept as signs of prestige or power. Given as tokens of love and affection, they also come in a kaleidoscopic array of hues and can be either mineral or organic. Gems can command a person s gaze in the way they play with light and express rich color. And they can evoke feelings of passion, greed, mystery, and warmth.
For millennia, gems have played an important role in human culture: they have significant value, both financially and within folklore and mythology. But just what "are" gems,...