{"version":"1.0","type":"link","title":"TAS classification - Newikis","description":"TAS stands for Total Alkali Silica. The TAS classification can be used to assign names to many common types of volcanic rocks based upon the relationships between the combined alkali and silica contents. These chemical parameters are useful because the relative proportions of alkalis and silica are…","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400}