Dale — Ordovician Outlier at Hyde Manor in Sudbury. 99 



new ones. The Ordovician age of the outlier was definitely 

 established by the admission by Mr. Ulrich of the finding of a 

 Streptelasma and crinoids in it on a previous visit. Finally 

 through the kindness of the late Mr. Fletcher Proctor, Presi- 

 dent of the Vermont Marble Co., the writer was also enabled 

 to have some core-drilling done, which was accomplished in 

 December 1911. 



The results of all the excavations and of the core-drilling, 

 and the structure at the important outcrops, are shown on the 



Fig. 2. 



excav. i 



-e 



SCHIST 



D 



NO"RTH ELM 



IS Inches , 

 5Ect.int>lane:di'pt>in& 4J°w. 



-e SCHIST {fg 



Tot. 13 ft 6 Mi. 



FENSTER THEORY 



ORDOVICIAN 



H 



INTERFOLDED OUTLIER 

 ORDOVICIAN 



map (fig. 1) and also in the diagrams of fig. 2. The details are 

 given in the following paragraphs. 



Excavation 1 (fig. 2, A). — A trench was first dug from a large 

 outcrop of Cambrian schist east of the northeast corner of the 

 outlier, and a continuous exposure of the schist obtained to its 

 eastern edge on the north. Then blasting was resorted to. The 

 schist was found to overlie the limestone and to dip 35° E. The 

 limestone surface dips about the same, but at one point 45° E. 

 Further blasting to a depth of 5 ft. below rock surface reached a 

 small cave with water which stopped operations. The foliation 

 of the limestone here dips about 35° E. ' 



