Miscellaneous References and Mentions

While our initial information about Phonolite came from various goverment sources (GNIS), we also found mention of Phonolite in various books and other sources.

We've created the following list to keep track of the sources that proved useful in adding to our knowledge about Phonolite. We hope that they will be useful to you.

Note: Initially, we were careless about keeping track of where our Phonolite data came from. The following list of references and mentions is incomplete.