To the naked eye, today’s photographs does not look like much. For me I find it puzzling and I hoping someone can explain and/or give me some type of geology lesson.
The photographs were taken in 1921/22 at the inlet of the Bly Tunnel. The smoke depicted, in the above photograph, is from the blasting. What intrigues me is the tailing pile, which is composed of sand! The tunnel was constructed through lava rock. So where did the sand come from? By all means, please share this post to anyone who can enlighten me, and everyone else who would like further insight.
