From a fairly recent scientific paper:

Despite this, G. and colleagues, in a series of abstracts …, continued to assign uppermost Chinle Group strata in the Ghost Ranch area to the Owl Rock Formation. Our reading of these abstracts and discussion with G. indicate that they are based on a lack of knowledge of regional Chinle Group stratigraphy and biostratigraphy, an inability to discriminate lithotypes accurately and a basic inability to trace beds laterally in the essentially flat-lying badland exposures in and around Ghost Ranch …. Thus, the work of G. and colleagues does not contribute to an understanding of Chinle Group stratigraphy in the Chama Basin.

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