The rocks on Lake Michigan’s Left Coast are incredibly rich in color, thanks in part to waves of glaciation that brought so many types of rocks to the region. Rich geological history spanning many rock-forming processes plays equal part in the palette. The warm caramel-brown swirls of these coal balls are interspersed with graphite grays and even stripes of hematite red. Anywhere you are on Earth, the colors of nature set out a feast for human eyes.
Coal balls, fossils from the Carboniferous Period (358.9–298.9 million years ago), by Left Coast Creative (© 2017 Elizabeth G Fagan) for the blog Lake Michigan’s Left Coast