TITLES AND ABSTRACTS OF PAPERS 121 



STRUCTURAL FEATIRES OF THE SOUTHERX OUACHITA MOUSTAiyS, 



OKLAHOMA 



BY CHARLES \V. HONESS * 



(Abstract) 



A map of tho aro.il ireoloi^y «>f one tliousaiid sciuaro miles of country lying 

 chiefly in the folded Paleozoies of McCurtain County, Oklahoma, was pre- 

 sented, together with appropriate ohfirts and structural cross-sections. 



The stratigraphy is the same as that in west-central Arkansas and involves 

 tlie fol lowing section : 



Trinity sand (Carboniferous). 



Unconformity. 



Jackfork sandstone (Carboniferous). 



Stanley shale (Carboniferous). 



Arkansas Novoculite (Devonian). 



Missouri Mountain slate (Silurian). 



Blaylock sandstone (Silurian). 



Polk Creek shale (Ordovician). 



Bigfork Chert (Ordovician). 



Womble shale (Ordovician). 



Blakely sandstone (Ordovician). 



Mazorn shale (Ordovician). 



Crystal Mountain sandstone (Ordovician?) 



Unconformity. 



Collier shale (Cambrian). 

 The structure is likewise similar to that in west-central Arkansas, and is 

 essentially a series of recumbent, plunging anticlines and synclines accom- 

 panied by thrust and normal faults. 



The sediments are predominantly shales, slates, and sandstones embracing 

 two formations of chert and all are considerably metamorphosed. There is 

 almost no limestone in the series. 



The present brief report, while it comes as a result of four years of field- 

 work and study in the area under consideration, can not be considered as a 

 summary of results and conclusions. It is more properly a report of progress 

 and a statement of the problems. 



Presented without notes. 



I)isrrssiox 



I)r. H. I>. Miskr: Several geologists have made reconnaissance trips into 

 the area described by Mr, Honess, but he is the first to map in detail the rock 

 formation.s. Structure as indicate<l by his map shows many points in conuiioti 

 with the structure of the part of the Ouachita Mountain region in ArU.iiisas. 

 One of the most noticeable structural features in the area described by him 

 is the high angle that the eastward or southeastward trending axis of many 



Introduced by C. P. Berke.v. 



