and as I did not see marked erosional uncom- formity, nor a marked change in lithology concluded that there is no break in this fault of durmin &. All of the sandstones in & show cross-bedding and channeling into the shales below them but in the limestone conglomerates especially that are cross bedded and channeled under surfaces. It is probable that the li. cong. are made of duridon material of the Cerm limestone lining. I saw however no fossils, nor any dolomite like that of Millers quarry or of Onaximus Point. Then too hardly any red shale are seen in these li. cong. If this evidence is correct I do not see how any of the faults & can be regarded as of duridon age. Then for the presence of muddy payments some of which look like payments of Calamites give me a strong impression that all of 8 and certainly the upper 570 feet are of Pennsylvanian time. No one reports duridon limestone nor coal gypsum that is in place in these beds of 8, under these circumstances it seems to me that age y & had better be regarded as if Pennsylvanian age. Since 7 of Logan is 650 feet thick and of it 148 feet are conglomerates decidedly arkosic and as a rule of sharply angular material.