Text and photos by Hutch Brown. Skolithos linearis fossils found along Four Mile Run (top) andHolmes Run (bottom). I was walking along Four Mile Run in Arlington’s Barcroft Park when I found the rock at the right (5” X 5”, with loupe for scale) on a gravel bar. I’ve seen others like it near otherContinueContinue reading “Fossils Along Our Local Creeks “