40 NEW YORK STATE MUSEUM 



with Other characteristic Trenton bryozoa and brachiopods such as 

 Stictopora elegant ula^ and Di north is pecti- 

 nella.^ Now Mr Veitch and his sons state that these fragments 

 were removed as an originally single and continuous slab about lo by 

 15 feet but only 5 inches thick, from a ledge which lay so near the 

 surface as to interfere with the plow. They say that this was 

 lifted with crowbars and afterw^ards broken for removal, and that 

 similar shaly and shelly rock formed a supposedly solid ledge under 

 it. The spot is now recovered with earth, the location being marked 

 only approximately by a swell of ground. 



It is difficult to believe that this thin-bedded material could have 

 been glacially transported in such broad slabs from the nearest 

 known exposures in Canada without disruption, since these are fully 

 25 miles away (see the outline map on page 6). All the other Tren- 

 ton drift fragments known to the writer in this region are small (not 

 over 3 feet) and well rounded. To be sure, Bucks Bridge slabs 

 up to 12 feet square are known, but these have not traveled far 

 and are both thicker and tougher. On the other hand it is entirely 

 contrary to expectation that there should be here any Trenton 

 strata in place or other than erratic. The Trenton limestone belongs 

 far above the Ogdensburg, with the Chazy and other formations 

 intervening. But this mass lies in one of the anticlinal reentrants 

 of the Beekmantown front and close down to lower Bucks Bridge 

 rocks (perhaps not in place but nevertheless significant) in the 

 bed of the brook hard by. If not a glacial erratic, then a great 

 post-Beekmantown, pre-Trenton erosion is here indicated. The 

 little knoll on which Mr Veitch's house stands is a small drumloid, 

 as shown by a well he was digging, but just possibly its core may 

 be a tiny Trenton outlier resting down on Bucks Bridge with entire 

 absence by erosion of the Ogdensburg beds (the Chazy and Black 

 River may not have been deposited in this area). In that case it 

 would be a most interesting link between the now sundered Trenton 

 limestones of Jefiferson county and Canada. The spot where it lies 

 is well suited for preservation of such a remnant. It must be 

 admitted, however, that the facts fail to prove this theory, though 

 the}' justify directing the attention of others thus to the locality. 



^ Hall, Pal. N. Y. 1:75, pi. 26, fig. 4a-g. Identified by the writer. 

 ''Orthis pectinella Emmons, 2d Dist., p. 394, fig. 2. See Pal. 

 N. Y. 1:123, pi. 22, fig. 10. 



