April 28-1913. Monday. Itagastown. At 8.10 A.M. Took the trolley car to Williamsport across on the Potomac. We then went on the Western Maryland along the track to see a log and fire exposure of the Martinsburg. Barber says the Martinsburg is between 2000 and 3000 feet thick. In the lower part it is dark colored and all shale, changing in the upper part to once and once sandy and finally to thin and leavy redded sandstones. The age of the lower part is about Middle Trenton and the higher is in the Eden but one part is in the Mansanutton, Just at the old abandoned Western Maryland R.R. station in Williamsport one sees the Reed-Grantman ore thrusts in the Lower Martinsburg, and here are got the grafted bits of this design. We then saw much of the Reed man toun with its alterations of thin zones of pure dark colored limestone alternating with irregular zones of impure li. that reaches well west and finally into sandy residual flaky pieces. The intraformational engl. are all massive zones and the pieces are nearly always small. It is these intraformational conglomerates that most often change into chalk with certain of the same lime li. pebbles reached out as far in the chalk