DINOSAUR TRACKS IN HAMILTON COUNTY, TEXAS 359 



is probably thicker here than in Somervell County, and northward 

 it thins out and almost completely disappears northwest of Fort 

 Worth, where the Paluxy and Trinity sands, ordinarily separated 

 by the Glen Rose, merge into one thick formation known as Antlers 

 sand. 



O 



I 



^ 



^ 







Fig. 5. — Diagram showing dimensions of track in Figure 4 



It is interesting to note that R. T. Hill in 1886 found dinosaur 

 bones in the upper strata of the Basement sands of the Lower 

 Cretaceous near Lambert, Parker County,^ and that he assigned 

 the name "Dinosaur sands" to this horizon.^ It is reasonably 

 certain that the beds in which the bones were found are approxi- 

 mately the equivalent of those in which the tracks occur in Somer- 

 vell and Hamilton counties. 



The writer expresses no opinion as to whether the tracks in the 

 two localities were made by dinosaurs of the same species. The 



' Twenty-first Ann. Rept. U.S. Geol. Surv., Part VII, p. 192. 



^ Amer. Jour. Sci., third series, Vol. XXXIII (April, 1887), p. 298. 



