718 



/. HOWARD WILSON 



Fig. 5 



up to i5 mm occasionally; light-gray and pink grains, the latter garnets, 

 the former probably epidote; material evidently derived from dis- 

 integrated granite ; minute fragments of shells found ? 



No. 5. — Almost pure quartz sand, grains varying moderately in 

 size, the smaller angular and transparent, the larger rounded and 



ground; occasional grains up 

 to 8 mm ; small black grains, 

 and also dark-green grains of 



glauconite ; occasional garnet 

 fragments, but no pebbles; a 

 few streaks are f erruginated ; 

 top of bed, sand fine and 

 angular with numerous black 

 specks. The upper surface 

 shows giant ripple marks in 

 places. Lignite was found in 

 the upper part, some in fine 

 laminae; one stem-like piece, 

 20 mm m diameter. 

 No. 6. — Begins with a very fine, lutaceous sand, with mica scales 

 and quartz grains, a rock flour with no clay odor. Higher up is blue 

 clay, not very sticky, with faint clay odor, containing much quartz 

 flour ; pockets of ferruginous sand, which suggest decayed ferruginous 

 concretions; one concretion found, consisting of a hard, reddish- 

 brown shell, containing coarse ferruginous sand, and small pebbles. 

 This structure is shown in Fig. 5. 



No. 7. — Highly ferruginous quartz sand, occasional pebbles, and 

 irregular fragments from the underlying bed. Quartz grains small, 

 mostly rounded, and opaque by iron deposit; minute shell fragments. 

 No. 8. — Sand of beach type, coarse and fine, the coarse rounded 

 and opaque, the fine angular and transparent, rounded quartz and 

 other pebbles up to 2 5 mm . Ostrea extremely abundant, commonly 

 with the valves still together, unworn and unbroken, and with 

 barnacles still adhering to them ; Petricola pholadijormis, with valves 

 together and erect; Venus mercenaria, with valves in contact and 

 held together by the ligament; Mya arenaria, with valves together 

 and erect; Ilyanassa, minute Odostomia, and other delicate shells 



