AngelIslandconsists mainly of rocks of theAngelIslandterrane of the Franciscan. These rocks differ from much of the Franciscan in that they are metamorphosed to the blueschist facies. Blueschists form only under the unusual conditions of extremely high pressures and relatively low temperatures that are characteristic of subduction zones.
Minerals can be classified by their properties (optical, physical, electrical, magnetic) and by their chemical composition. Minerals can, therefore, be identified by spectroscopic or visual observation; however, chemical analysis is the only means of identifying the precise nature of the mineral.
In practice a lot of customers don’t know how to maintain the stone sand making machine, here, let me introduce for you. Our stone sand making machine is mainly can be divided into two categories, one is mining system sand machine, is mined ore in mining, need to use when broken flour, workers will need…