This Image depicts lava flowing out from beneath a bank of previously solidified lava. As the new lava touches air for the first time, it begins to cool rapidly which creates a crust on the outer layer. Depending how long ago the crust was formed, the crust color ranges from a bright orange to a shiny silver color. Gravity is what drives this flow and temperature is what gives it such vibrant colors. I selected this image because the combination of colors really caught my eye, but I was also very impressed at the art that nature had made without any sort of human interaction. I think it is truly incredible that material from deep within the earth can be spasmodically exuded to form these ever changing and always glowing sculptures.
Photo Credit: Hawaiian Volcano Observatory as part of the USGS