RAYMOND: CORRELATION OF THE ORDOVICIAN STRATA. 201 



Wassalem thus shows at its type locality many of the characteristics 

 of a reef. The outcrop of the Wassalem has a width of about two miles 

 and south of it one finds blue and buff, very fine-grained dense lime- 

 stone, somewhat purer than that at Kegel, but with the same fossils, 

 Cyclocrinites spasshii (or C. rocmeri, as Stolley calls it) being very 

 abundant. This limestone appears to belong to the Kegel, though 

 it has previously been called Wesenberg. The reasons for this belief 

 are given on page 202. The Bryozoa described by Bassler as coming 

 from the Wassalem were very probably deri^-ed from a lense of the 

 fine-grainecf buff limestone associated with the reef, for their appear- 

 ance and the lithology of their matrix is entirely unlike that of the 

 typical Wassalem. (Plate 6). 



W csenhcrg formation. E (Wesenberger schicht, partim), of Schmidt. 



The strata of this formation are well shown in three or four shallow 

 quarries about one and one half miles southeast of the town from w^hich 

 it derives its name. The limestone is a very fine-grained, dense, blue 

 to yellowish buff rock, so fine grained as to have received the name of 

 "lithographic stone." It is usually in layers three to five inches in 

 thickness, the layers separated by thin shaly partings. The good 

 fossils adhere to the limestone and stand out in relief when the shale 

 is washed away. The deepest quarry shows a face 6f sixteen feet, 

 the lower eight feet being compact light blue limestone and the upper 

 eight feet somewhat less compact and more magnesian limestone 

 which becomes yellowish on weathering. Lithologically these strata 

 differ from the rocks of the Kegel at Kegel in being less earthy, more 

 compact, and in containing definite partings of shale. Fossils are 

 exceedingly abundant in these quarries, the most conspicuously com- 

 mon being Amphilichas holmi, Homolichas eichwaldi, Chasmops 

 wescnbergcnsis, and Encrinurus srcbachi. 



The Baltic railroad runs in a southwesterly direction from Wesenberg 

 to Taps and thus traverses the outcrop of the Wesenberg diagonally. 

 Between the two stations there are several small cuttings, one of them, 

 about two miles east of Taps, being in strata very near the top of 

 the formation. A tiny quarry, a few rods south of the railroad and 

 near the stream just east of Taps shows strata even higher in the 

 formation. In both localities the rock is a hard fine-grained yellow- 

 ish to buff limestone, without shale, and .fossils were exceedingly 

 scarce. In the small quarry I obtained Clitambonites ivesenbergensis, 

 a Discoceras, and Chasmops wescnbergcnsis, fossils which are char- 

 acteristic of the Wesenberg at the type-locality. A half mile south 

 of these outcrops one finds the Lyckholm, with typical fauna. 



