Category: Rocks & Fossils
Horseshoe Crabs on Memorial Day
Horseshoe Crabs on Memorial Day I discovered horseshoe crabs as a child summer-vacationing on the Eastern seaboard. They washed up on Maryland’s barrier spit, creating marvelous spectacles for screeching toddlers. The creatures were sleek, green, […]
Permian Synapsid
Skull of a late Permian synapsid or therapsid from the southwestern shore of Lake Michigan. A found piece, it’s been preserved in sandstone and sandy chert. Looks like a late dimetrodon whose skull was bashed, […]
On the Devonian Coast
About the Rocks & Fossils Art, content, photography, lakemichigansleftcoast.com, Lake Michigan’s Left Coast © 2015–2023 Elizabeth G Fagan Unauthorized use is prohibited
Permian Amphibian
Permian Amphibian North America’s Great Lakes region was once the bed of an ancient sea. Fossils abound if one knows where and how to look. Paleozoic fossils of many periods regularly wash up on the […]
Extinction is Forever
Extinction is Forever The bedrock of the western coast of Lake Michigan (aka Lake Michigan’s Left Coast) is Paleozoic limestone and dolomite. It dates from the Devonian Period (420–350 million years ago). Abundant in rocks […]
Time & Deep Time
The Geologic Timeline Put aside the drumbeat of your life. Clear your mind. Gather an image in your head of planet Earth spinning in tandem with Mercury, Venus, Mars, and the giant planets around the […]
Ghosts in the Stones
Ghosts in the Stones Lake Michigan reached record low-water levels in January, 2013, creating bountiful beaches on Wisconsin’s shoreline. By Winter, 2014, however, the Lake started rising. By April, 2020, it had risen more than […]
Lake Michigan's Left Coast 