Greenstone

Greenstone. A field term applied to any compact, dark-green, altered or metamorphosed basic igneous rock (e.g. spilite, basalt, gabbro, diabase) that owes its colour to the presence of chlorite, actinolite, or epidote. Source:...

Galets

Galets, French term for large stones [eg. pudding stones] found in Châteauneuf-du-Pape AOC in the southern Rhône which accumulate heat during the day which is released at night, aiding ripeness, especially for red varieties. See soil types.    ...

Montmorillonite

Montmorillonite are the main composition of clay minerals in sediment and suspended particulate matter, and the soil or sediment containing montmorillonite clay are recognized as good adsorbents owing to the existence of varies active sites such as the surface- and...

Montalcino: Geology & soils

Montalcino: Geology & Soil Jan Erbach of the Pian dell’Orino estate describes Montalcino’s underlying geology as ‘complex because it was formed by the Sardinian and Corsican geological micro-plates (the latter being part of the African plate) drifting...

Iron oxide

Iron oxides are chemical compounds composed of iron and oxygen. There are sixteen known iron oxides and oxyhydroxides, the best known of which is rust, a form of iron(III) oxide. Iron oxides and oxyhydroxides are widespread in nature and play an important role in many...

Gunflint

Gunflint (plural gunflints) refers to the piece of flint or other suitable natural stone that is used in a flintlock weapon to generate a...