2933 Horse de Gras July 4-1907. Set-up at six, a bright and delightful cool morning, this the birthday of one country. At the rail-road station (track A R) Principio is a sand pit with the following sections: surface yellow(ferrous?) loam, irregularly balled, 1-4ft. Maybe a laguna deposit. Blue-white silty clay, partly fractured, 1-4 inches. [illegible] stiff, coarse, clean white sand and a few more rounded, small pebbles. Argillay balled, Cross balled. Loose sandy loam with some marked head sand. 7 feet deep. The contrast between these beds is very striking. The lower sand in the basal Potomac (Patuxent) and looks most like a coarse head sand that has not been worked dry dry. Then a sudden change bringing in the layers of plastic clay, followed almost immediately by another change, flushy of the plastic clay into angular lumps. The latter in the yellow ferrous loam-- if these are marine deposits they are on the shore. The white sand is more probably a head sand.