Fossil orthoceras

I took my two boys camping next to a little creek just upstream from the Illinois River. Five minutes after setting up camp my oldest son found this about 20ft off shore.

Orthoceras fossil closeup

Closeup view of the fossil.

Measuring the orthoceras

It looks like a snake to us, but we aren't sure.

Fossil Collector: Frawley78

Location: Illinois River tributary, Illinois

[Editor's Note: Beautiful find! As you might have guessed from the title, what you found is actually an orthoceras fossil. Orthoceras are cephalopod relatives of the squid and what you are seeing is a cross section of their long spiral shell. Search  for Orthoceras in the search box above and you will see other examples to compare it with.]

VN:F [1.9.22_1171]
Rating: +3 (from 3 votes)

Leave a Reply