Retired geology professor, specializing in mineralogy, petrology and field geology.

I bought my first Pentax in 1959 and have been using one ever since, although I recently added a Sony ILCE 7M4.

I take pictures to share with others the beauty I see and the unusual things I encounter. If you wish to use any of my photos for other than "Favorites" I request that you ask my permission first. Photos are copyrighted.