Field Notebook: Oklahoma 1919
Page 79
Image from the Biodiversity Heritage Library. Contributed by Yale Peabody Museum of Natural History. | www.biodiversitylibrary.org
Transcription
creeding was seen. The evidence Hovren says all is for shallow waters for delta, and perhaps all of the marine side but near the estuarial part of the delta. Near the middle of the Stanley are coal flecks stales and coal black cherts that remind much of the Fordfnd. Hovren strongly believes that this is the equivalent of the Fordfnd and if so it casts a new light on the age of the Fordfnd and explains why geologists have stated the absence of the Fordfnd in the Ouachitas. Much Koell shale recurs above in the higher Stanley formation. Thin beds of coal recur near the top of the Stanley in association with the plants. These beds are very thin, perhaps in thickness, and of short lengths. There are however many of them. The Jackfork is mainly a sandstone deposit with shale gneiss. Hovren says they are in every way like those of the Pennsylvania. These beds are replete with drifted plant fragments. Not only have he seen Calamites, mainly small ones less than one inch in diameter, that he has seen Hallwell