Thomas BrightbillGrand Prismatic - Oil on Asphalt
Yesterday the recycling truck left a series of oil splotches on the pavement. This one was about 18 inches (45 cm) across and reminded me a lot of the Grand Prismatic spring in Yellowstone.
A photo of the real Grand Prismatic: https://en.wikipedia.org/wiki/Thermophile#/media/File:Aerial_image_of_Grand_Prismatic_Spring_(view_from_the_south).jpg
