Greenstone, Banded Iron Formation, and stromatolite fossils, Lake Michigans Left Coast, by Elizabeth Fagan

Greenstone, Banded Iron Formation, and Stromatolite Fossils

In its earliest youth, our planet was molten, red-hot, and battered by abundant meteorites. Earth was so hostile to life that scientists named this period the Hadean Eon (4.6–4 billion years ago), for Hades, the Greek god of the place known as Hell. Life began to evolve after Earth settled down a bit, in the … Continue reading Greenstone, Banded Iron Formation, and Stromatolite Fossils

Chert with jasper, Lake Michigans Left Coast, a blog by Elizabeth Fagan

Banded Chert

I am not sure what to call this piece of chert with jasper bands other than "banded chert." It is one of the many rocks of mysterious origin I find on the Lake Michigan coast of Ozaukee County, Wisconsin. Copyright, Disclaimer, Bibliography