One of the students first discoveries at the Lilydale Regional Park (old Twin City brick yard along the Mississippi River in St. Paul) on our fossil collecting field trip lead by Alan, a geologist from the Minnesota Geological Survey, University of Minnesota.
Alan helped us find, identify and understand more about some of the fossils that remain from the continental seas of millions of years ago.
During the Ordovician time, Minnesota was located 10 to 40
degrees south of the equator. The sea that covered Minnesota
contained a variety of marine organisms including corals,
bryozoans, brachiopods, clams, snails, cephalopods,
Eli, Marcus, Amanda, Andrew, Gita and JanLouise
Hammering, chiseling digging and smashing limestone rock.
We found crinoids, bryozoans, brachiopods and a small piece of trilobite.
Here is Alan, he described how rocks shapes demonstrate the presence of glaciers.
Sam brushing off the sand.