Field Notebook: Oklahoma 1919
Page 33
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Transcription
October 20. Monday, Lelfham. A dark threatening morning, but we are in in Ardmore at 8.30 A.M. It is about 35 miles to Ardmore. By nine o'clock the indications are for a clear day. Five or 6 miles south of Lelfham we see the first deformed strata of the Ashwood, the Brodfield chalk. Here beside the road at the crest of a hill the strata dip about 30 degrees to the north consist of a series of white shales (with shales of lighter green or lighter pink) with thin goss of some flint cherts (2 to 4 inch thick). Small flint chert nodules occur in the shales. Other traces for fossil are seen. In the stream near by the chalky Hacks of the tract gives a A little to the north of the Brodfield chalk exposures at this I saw the Lominite conglomerate. This conglomerate varies all the tide formations and its character depends upon the underlying formation. Dr. Pleas, Bryon states it is all of limestone, Broad- field chert, or other material. About 8 miles south of Lelfham we turned into a side road going past Chetro and then to the farm on which is located the "White Orchard" of Helodotupian fossils. I never saw so many fine fossils at any locality before. Beneath the red clay conglomerate formation occurs a third series of muddy left flint limestone or calcareous hard shales in which the fossils