"The detailed structure of this Boulder shews that it had been metamorphosed and how structure developed type interment in the Oranite conglomerate. It has heeled off some rocks that have been broken apart and in the floor of the may lie dropped about. Besides we see the lines of flow in many places, and even folding upon itself. When did this metamorphism take place? Certain type interment in the Oranite Congl., and this means before Middle Ordovician. To do this rocks must have been made at the close of the Cambrian, i.e. after Billiston Limestone time. If this argument is correct then we have have the evidence of O's for which glaciers may have flown into the seas of Billston River Time underlying these Oranite Congl. The simpler explanation is that these lie are reef limestones and that they originally were modular, and in place small pellets became clastic. Of course the whole was diagenetically altered during deposition. Then when the Appalachians arose made the limestone was subjected to intense pressure bringing on the final and present metamorphoses." Highgate Centre, Sep 20-1922 Monday.