[[underline]] 1892 [[/underline]] 
[[underline]] November 24. - continued [[/underline]] 
The same party named on the preceding page visited Anacostia and re- 
examined much of that region, proceeding up the Stickfoot Run from the 
railroad. The exposures of lignite bearing blue clay at the old locality are 
much improved and the mottled clay appears overlying the blue on the 
left bank and up the slope. We definitively referred the exposure on the 
east side of the road to the Lafayette, the flecks and pellets of clay being 
out of the Potomac. Another important conclusion reached was that the 
3-5 feet of yellow sand overlying the Potomac clay and underlying the 
ledges of cemented Lafayette gravel farther up the run does not belong 
to the Lafayette but is the representative at that point of the upper 
Potomac sands (Albirupean) which comes in so heavily farther up the 
run and on the surrounding hills. 
[[end page]] 
[[start page]] 
We found the largest section of these latter, several times before 
examined by one and lying east of Mr. Williams's place (the colored 
minister whom I once before met there) to be overlain by some 8 or 10 
feet of marine Tertiary, perhaps all Chesapeake but having a few inches 
of greensand at its base which may represent the Pamunkey. The 
section on Mr. Hunter's land was also examined. From here the 
thickness of the sand below to its contact with the red clay can be 
estimated as seen in the field below. Putting all together the vertical 
thickness of the white sands from the top of the clays to the Tertiary 
must be about 50 or 60 feet. 
Passing over the hill by Fort Stanton we proceeded to the Good Hope 
road striking it at the brick yard. Here brick is made of the Columbia 
brick clay and in getting it they scrape the Potomac vein on clay floor 
Local field note-book of Lester Ward 
Transcribed and Reviewed by Digital Volunteers 
Extracted Oct-11-2015 07:35:03 
Smithsonian Institution Transcription Center, Smithsonian Institution Archives 
