April 25 - 1913. Washington, Started out with Dr. Barker, Miss Hildebrade and Miss [illegible] to see the Potomac deposits at the head of 16th N.W. At the Geological Garden en- trance we saw the older Pleistocene gravels directly overlying the Potomac beds. These are upon the Piedmont plateau and at a higher level than the Potomac. Then we went down 16th street and looked over from the level Piedmont plain, the cliff to the Coastal plain in the Falls zone. Just as soon as we got a little below the Pied- mont plain the Potomac came in in great force here it was again overlain by the Pleistocene gravels. The Potomac against the Falls zone is distinctly free of local conglomerates and the sands are abundantly cross bedded with the sand against the Falls zone [illegible] Everywhere in the Potomac there is once a ton of hard[illegible] streaks, and in places, these are especially are filled up with small snail shells.