126 G 6 . REPORT OF PROGRESS. I. C. WHITE. 



flagging ; many fragments of fossil plants are seen on the 

 surface of the flagstones ; too much macerated for deter- 

 mination however. 



No. 16 is a very hard calcareous fish conglomerate, and 

 is seen for several rods in the cuts of the D., L. & W. R.R. 

 It is almost as hard as granite, and contains great quanti- 

 ties of bluish-green shale in pieces the size of a silver dol- 

 lar, and upwards ; it also contains many fragments of gray- 

 ish or bluish-white material, which very probably repre- 

 sent fish bones. 



At Montrose Depot a succession of massive sandstones is 

 seen outcropping along the steep hillside on the right bank 

 of Martin's creek. Far up in the hills, 300' above the De- 

 pot, a very massive one occurs, and this is the New Milford 

 Upper sandstone, or the rock that usually comes 350' above 

 the base of the Catskill sandstone series ; large grayish- 

 white blocks of it lie scattered over the hill from top to 

 bottom. 



The valley of Martin's creek, though quite narrow, is 

 filled with Drift and it is very possible that a tongue of the 

 northern ice sheet stretched from the Susquehanna valley 

 across from Big Bend by way of the Salt Lick creek cutting 

 down the divide at the head of Martin 1 s creek in its path, 

 and extending southward along its valley, since the Drift 

 material is different from that on the summits of the hills, 

 and the same as that left in such huge heaps along the Salt 

 Lick valley, on the northern side of the divide. 



Just south of Tewksberry School House, one mile west 

 from Martin's creek, we see Glacial striae, at the roadside 

 trending S. 30° W. magnetic ; they are on one of the grayish- 

 green sandstones of the Catskill and at 1515' A. T. 



About one half mile south from Tewksberry School House, 

 an elevated knob is capped with a cliff of grayish-white cur- 

 rent-bedded sandstone at an elevation of 1610'. This is most 

 probably one of the Montrose sandstones, since one mile west 

 from this the base of the Catskill sandstone series occurs at 

 950' A. T. (1610'— 950')=660' below the sandstone on Tewks- 

 berry hill. 



One mile south from South Pond, at the cross roads near 



