100 TRANSACTIONS OF THE [1890 



This determination of ferrous solutions towards particular spots, 

 or small deposits, of the sand has not yet been accurately 

 described, but it is a marked characteristic of some parts of this 

 member, and it occasionally spreads so widely as to include all 

 the material in an area many rods in length and several feet in 

 thickness. This member rises to altitudes of 70 to 80 feet 

 above tide, and it extends from the upper end of Round Bay to 

 about a mile and a half from Chase's Creek. It occupies the 

 position which is held by the Red Sand in New Jersey, and it 

 may yet prove to be the less altered representative and con- 

 tinuation of that member of the Lower Marl. 



It is a moderately compact body of sand in most parts, but 

 it is slightly mixed with atoms of clay in its lower division, and 

 shows indistinct stratification in some beds of its upper portion. 



Middle Marl Bed, of the New Jersey system. This great 

 body of greensands and clayey sands forms a comprehensive 

 series of beds and strata, which along the register -line here 

 adopted is chiefly represented by two thick members, differ- 

 entiated from the underlying strata by a greater proportion of 

 coarser glauconitic grains, imbedded in variable coarse quartz 

 sand, and also by the conspicuous presence of great aggregations 

 of laminar iron-rock, twisted and bent along horizontal lines, or 

 grouped together in oblong pockets or cells. 



The underlying member, or Loose Marl, which in some 

 places is made up almost entirely of glauconitic grains, is here 

 chiefly a stratum of loose greensand, mixed with a varying pro- 

 portion of quartz sand, presenting a greenish gray appearance 

 when not altered to a yellowish brown color by ferrous solu- 

 tions. This Loose Marl, as it has been called to designate it 

 from other members of the Cretaceous system, is first exposed 

 a few rods below the railroad station at Round Bay, and con- 

 tinues on in varying thickness, with a distinct eastward slope, 

 until it passes beneath tide about one mile above the railroad 

 bridge on the Severn river. Its greatest development is in the 

 vicinity of Chasers Creek, where it rises to an altitude of fully 

 70 feet above the tide; but at its inner end, adjoining Mount 

 Misery, it tapers off to a thickness of less than five feet. In a 

 section which is well represented a short distance below 



