142 



L. tetragonum, Strobila, Dadoxylon antiquum, Cordaites, 

 Psilophyton plumula, Alethopteris lonchitica, Stigmaria, and 

 Catamites undulatus. 



At the first prominent headland the beds are sharply 

 flexed in the synclinal axis. Beyond, minor thrust slips 

 render the dips more variable. A characteristic feature 

 of these upper shale beds is the presence of large irregular 

 septarian concretions. At the following headland there is a 

 heavy channel deposit of sharp angular quartz sandstone, 

 while about 150 yards (137 m.) beyond, there is an 

 interesting horizon of Lepidodendra standing upright. Over 

 thirty plants were counted within 10 yards (9 m.) of the 

 section. They are all small in size, falling under 10 inches 

 (25 cm.) in diameter, and the remains are now shale casts 

 of the interior, all trace of the bark having disappeared. 

 Just beyond the succeeding headland, perhaps 150 yards 

 (137 m.) further, there are several bone beds, remarkable 

 for the abundance of fish remains such as scales, spines, 

 jaws, clavicles, and teeth. These are the remains of com- 

 mon elasmobranch and ganoid genera, such as Strepsodus 

 hardingi, species of Acanthodes, and scales of Elonichthys 

 and Palceoniscus. 



The remainder of the section, where not concealed by 

 drift, shows the strata in general maintaining their north- 

 erly dips but with frequent dislocation. Finally, however, 

 the dips increase until the beds are standing almost verti- 

 cally at the axis of a sharply closed anticline. Crumpling 

 and faulting persist to the most important fault of the 

 section, where the northerly dipping black shales abut 

 against the southerly dipping grey arkose and brick-red 

 shale. At other localities this arkose series is seemingly 

 in conformity above the typical Horton, a fact which would 

 indicate a downthrow here to the south. Similar arkose 

 with interbedded shales carrying the Horton flora, occur 

 in the brooks south of Windsor where it rests unconform- 

 ably in steeply pitching contacts, on the pre-Carboniferous 

 crystallines. A prominent feature of these beds, aside 

 from their arkosic appearance and the chocolate colour of 

 the shales, is the occurrence of channelling or local erosional 

 unconformities between the sandstones and shales. From 

 their highly disturbed condition near the fault, the beds 

 soon resume a low northerly dip to the axis of a low anti- 

 cline from which they dip gently southward beneath a heavy 

 covering of drift. The next rock outcrop lies 3 miles 



