"In the 'Deronic' = Pennsylvanian series at once four so far below the contact one sees an abundance of birolas and in about 200 ft from contact the Estheria are very common. Hyde got one Leacia lidgei 70ft below the contact. In places The "Deronic" is a series of shales, predominating green to argillaceous shales with thin bands of sandstones and in places with red shales. All are even crested and rippled extremely abundantly Every where the omne birolas abound, even in the even- crested layers. Evidently the deposits are of tidal estuary with the action of tides permanently over the area but as a rule exposed between tides or at least at time of very lowers tides. When the birolas are thicker then the Estheria are absent. In other places red sandy micaceous shales predominate dirty followed by sandstones, an occasional clear crushed quartz sandstone and then some silty shales filled with the birolas. At the eastern end of the section before arriving at the day covered area one sees dark green (slate) shales mud- cerudary ded with gypsum. At least 2 and probably 3 such places delay fault lines occur. These are crust gypses, and it is probable that some of the Windsor beds are thrust of orist faults of the bedded gypsum, but no recognizable Windsor beds encountered.