Z'2 Bulletin 4 146 



above the Cretaceous-Eocene contact more casts may be seen in a 

 matrix very much like that indicated above. The following 

 species are fairly abundant: Endhnatoceras ulrichi, Calyptrophorus 

 velatusvax., Turritella humerosa, T. mortoni, Meretrix probably 

 ripleyana and Venericardia alticostata. 



These exposures to the north of Snow Hill are indicated on 

 p. 31 by bed 21 and the off-set as explained in the section. 



Three and one-half miles northeast of Snow Hill and about one 

 mile east-northeast of the last mentioned cut on the railroad 

 north of the station, the Cretaceous- Eocene contact is beautifully 

 exposed in the highway as shown in Plate II. The ledge that 

 shows in the midst of the scenery and causes a sharp descent in 

 the road is caused by the incursion of the Eocene sea. Hence in 

 the greater part of this layer, rolled fragments of Exogyra, Belem- 

 nites, Nucula percrassa and many silicious pebbles abound, while 

 at its upper surface and above, Cuadl^a saffordi, E^tdhnatoceras 

 idridii, Venericardia alticostata var. and other Midway species 

 occur. 



One of the most interesting localities in this region is that 

 designated as Palmer's mill (see frontispiece of this work) in 

 Bull. 43, U. S. Geol. Surv., pp. 67, 73. It is on the Camden 

 road about 5 miles west of Snow Hill. Smith says (p. 67) that 

 in this vicinity "we have the lowermost of the Tertiary beds in 

 direct contact with the uppermost of the Cretaceous. At this 

 place the beds of the two formations appear to be strictly con- 

 formable with each other. Here, also, the lower Tertiary beds 

 have a very striking resemblance in lithological characters to 

 some of the Cretaceous; but the fossils, as Mr. Johnson has 

 shown, leave no room for doubt as to the age of the beds." 



By turning to p. 73 op. cit. or to p. 31 of the present work it 

 will be seen that the strata shown in our frontispiece (PI. I) are 

 regarded by Smith and Johnson as Cretaceous. By diligent ham- 

 mering for half a day the writer was able to collect from these 

 beds, Endimatoceras idrichi, Venericardia planicosta (typical), 

 Calyptrophorus velatus, Keilostoina mediavia, Meretrix, Turritella 

 ■ntortoni, Valuta lyroidea, Cuctdlcea saffordi, Modiola saffordi and 

 many fragments, none of which showed a trace of Cretaceous 

 characters. These beds are numbered 2 1 in the section given on 

 p. 31, and as has been remarked before, they occur in the railroad 

 cut just to the north of the Snow Hill. We therefore conclude 

 that they are at the base some 40 feet above the Cretaceous- 

 Eocene contact. We find no well preserved fossils in bed 20, p. 

 3 1 , but we have no doubt that had they been obtained they would 

 be Eocene and not Cretaceous, Johnson's statement to the con- 

 trary notwithstanding; for they range from 50 to 100 feet above 



