87 



such a bad state of preservation that it is impossible to deter- 

 mine them beyond the fact that they are Unios. While visiting 

 this locality in 1933 I found on the weathered surface of this 

 carbonaceous bed, near its eastern end, a number of fossil seeds 

 and fragments of plants. 



Overlying the carbonaceous bed there is a three foot layer 

 composed of clay and sand greatly iron stained. There are ir- 

 regular layers of ironstone running unsymmetrically through- 

 out the bed. The clay is grayish brown in color and contains a 

 few grains of white quartz distributed throughout. This bed, 

 which is barren of fossils, pinches out towards the east and 

 west. 



Between this bed and the next outstanding one is a thin 

 layer of about 6 inches of white sand composed almost entirely 

 of clear well rounded quartz grains associated with a few milky 

 quartz pebbles of about j inch in diameter. This layer of sand 

 is continuous across the entire face of the Point, but fades out 

 after a short distance. 



The next bed is a very outstanding one. It is about 1| feet 

 thick and has a very green color. This color is due to the glauco- 

 nite which makes up the greater part of the material of this zone. 

 This zone maintains a uniform thickness throughout its length, 

 but it can only be traced a short distance in an east-west direc- 

 tion for it intermingles and dies out into a bed of sandy clay. 

 Just why is a bed composed of glauconite found covering a 

 Pleistocene cypress swamp? That is the first question which 

 presented itself to me, but after following the bed around the 

 Point in both directions and finding that it died out I came to 

 the conclusion that it must contain reworked glauconite from 

 Aquia formation. Along with this glauconite I found fine flakes 

 of white mica. This evidence is also substantiated, as I will 

 show later, by the fact that the age of some of the fossils which 

 I collected are much later than Eocene. 



Overlying this glauconite bed there is a layer of 3^ feet of 

 Pleistocene sand and gravel, the upper part of which is mostly 

 top soil. This uppermost layer is continuous over the entire end 

 of the Point. 



Clustered around the extreme end of the Point and exposed 

 — only at low tide — are about 25 cypress stumps. The size of 

 these stumps range from 2 to 6 feet or more in diameter. In 



