When Louis Agassiz delivered, at the University of Iowa, in 1867, his now famous lectures on Ancient Coral Reefs, he selected for his main theme the great coral reef upon which Iowa City was built. Reputation of Iowa's great Coral Reef was established. This reef was, as we now know, the main median body of Owen's Cedar Valley limestone. Now this great coral reef appears not to extend very far south of Iowa City, and seems to be altogether unrepresented in Missouri. Inasmuch as in Missouri the Cooper limestone appears to be the equivalent of the Wapsipinicon limestone of Iowa, the Mineola limestone the extension of the Solon limestone of Iowa, and the coral reef to be absent in the south, it leaves the Callaway limestone representative not of the whole of the Cedar Valley section of Iowa, as commonly assumed, but only that portion above the coral reef, and known as the Hutchison formation. All the numerous Callaway fossils common to the two states come from this uppermost Cedarian horizon. In view of the Callaway being the first title proposed for the formation it is now introduced into Iowa terranal terminology.
Proceedings of the Iowa Academy of Science
©1939 Iowa Academy of Science, Inc.
"Missouri Equivalent of Cedar Valley Limestone,"
Proceedings of the Iowa Academy of Science, 46(1), 254-255.
Available at: https://scholarworks.uni.edu/pias/vol46/iss1/68