An Ammonite Fossil Leaves A Trail of Evidence of a Tranquil Jurassic Seafloor

A remarkable trace fossil has given us a glimpse into the environmental conditions of a Jurassic seafloor.   Ammonite fossils are common in Jurassic rocks but one particular ammonite is more unusual than most.  In the horizontal layer of rock where it was found a 28 foot-long line of shallow grooves was found leading right up to the […]