702 PROCEEDINGS OF THE BALTIMORE MEETING 



The third group in the general classification of these erratics includes quartz- 

 ites of dark and reddish hues. 



These erratic boulders vary in size from small pebbles to boulders of enor- 

 mous size, a few of which attain lengths of more than 50 feet. Many of the 

 smaller boulders are more or less rounded, while a few are quite perfectly so. 

 The larger ones are, as a rule, angular. 



At three separate localities in the Ouachita Mountain region certain of the 

 limestone and flint boulders contain grooves and striae as if produced by the 

 action of shore ice. Certain of these striae also resemble the markings of 

 slickensided surfaces. The evidence as to the origin of these gouged surfaces 

 is not conclusive. 



The erratic boulders contain a comparatively abundant Ordovician and Silu- 

 rian fauna. The boulders are promiscuously scattered in the Caney formation 

 of black and blue shale with local beds of sandstone in the upper part. 



The Caney formation is several hundred feet thick and contains limy concre- 

 tions or segregations, associated with the erratic boulders and elsewhere, that 

 contain an abundant fauna of late Mississippian or early Pennsylvanian age. 



The area of boulder-bearing beds of the Caney formation, as now known, is 

 within the Ouachita Mountain uplift in Oklahoma that extends within a few 

 miles of the Arkansas line to the west end near Atoka. The structure of the 

 region is typically Appalachian, the rocks being closely folded and thrust north- 

 ward. 



On comparison, both lithologically and faunally, the erratic boulders are 

 found to contain identical characteristics in the Cambro-Ordovician and Silu- 

 rian rocks in the Ouachita Mountain region of Oklahoma and in the Cambro- 

 Ordovician section in north-central Texas. There are evidences of emergence 

 of the rocks of mid-Carboniferous time in the western part of the Arbuckle 

 uplift and in the Texas region to the southwest that affect the Cambro-Ordo- 

 vician and Silurian rocks. The tentative conclusion is that the boulders were 

 transported from a land to the south by the agencies of ice. 



This paper was discussed by David White, W. C. Alden, and J. A. Taff. 

 The last paper on the sectional programme read was 



RELATIONSHIPS OF THE PENNSYLVANIAN AND PERMIAN FAUNAS OF KANSAS 

 AND THEIR CORRELATION WITH SIMILAR FAUNAS OF THE URALS 



BY J. W. BEEDE 



[Abstract] 



Owing to physical changes which occurred during the close of Pennsylvanian 

 time, there occurred a great reduction of Pennsylvanian species, followed by the 

 introduction of Permian species. This introduction of new species becomes 

 very noticeable in the Elmdale formation, and its base is considered the base of 

 the Kansas Permian. The Permian, as here understood, includes the Artinskian 

 and "Permo-Carboniferous" of Eurasia. 



