120 



NEW YORK STATE MUSEUM 



to the west just above the month of Wappingor creek, and ex- 

 tending: to the west of Xowbnrg as above indicated. 



It is worthy of remark Ihm-c that tlie United States Coast Snrvey 

 sonndings of the bott<>ni ot iho Ilndson show a well marked ridge 

 crossing tlie Hudson from the north side of Sherman's dock 

 about 1 mile north of the steamboat landing at Newburg in a 

 northeasterly direction to the east shore. Over thi-s ridge the 



I 



Fijf. 13 Sketch map of the bed of the Hudson near Newburg N. Y., showing- I ar 

 crossin^r the bottom of the Hudson. Kif,aires indicate depth of Mater in fathoms. C( n- 

 Btructed from Tnited States Coast Survey chart no. 371 



depth of water is 6 fathoms. North and south of this bar the 

 channel falls ofl' to depths of 7J on the north and 8 fathoms on 

 the south and these depths are maintained for several miles up. 

 and down the river. There is no reason for sui>posing that this 

 bar is a iHtiiiial feature of the development of the river, and it 

 is explicable apparently on one of two hypotheses, either that it 

 is due to a reef of rock less eroded than the rocks north and 

 south by glarinl aclion in tlie channel or that it is a deposit made 



