702 GEORGE B. RICHARDSON 



and Latrobe folios, so that only a few words need be added in 

 explanation of the map. West of the Chestnut Ridge anticline 

 the Latrobe syncline forms the northern extension of the Con- 

 nellsville basin. This syncline rises and flattens out between 

 Blairsville and Indiana, displacing the two westward succeeding 

 folds. These folds are the Fayette anticline and the Greensburg 

 syncline. Well developed where they cross Loyal Hanna Creek, 

 northward in the vicinity of the Conemaugh River they fade 

 away and merge into the western flank of the Latrobe syncline. 

 The next fold to the west is the Jacksonville anticline, which has 

 its maximum development near the town of Jacksonville. South- 

 west of Indiana there is an offset in the axis of this fold. Thence 

 the arch continues northeastward, as the McKee Run anticline, 

 and forms a low fold separated from the Chestnut Ridge anti- 

 cline by the extension of the Latrobe syncline. Northeast of 

 Indiana this syncline is divided in two by a south-plunging anti- 

 cline, which, passing between Decker's Point and Marion Center, 

 is well marked near the town of Richmond. 



George B. Richardson. 

 Washington, D. C. 



