THE ACADIAN TRIASSIC 121 



The plant remains were described by Dawson 1 from poorly 

 preserved material as Dadoxylon Edvardianum. They consist 

 of silicified plant-stems and of lignite, showing pith : casts. At 

 Gardner's Creek and at Vaughan Creek (Quaco), the material is 

 largely silicified, and appears to have been transported some 

 distance. At Martin Head, lignite is exposed in several horizons 

 and is quite abundant. Silicification has not replaced the plant 

 tissues to such an extent as in the other localities. 



The Martin Head locality is the only one where material is 

 available for study. Miss Holden has recently examined the 

 lignite, and found two species of plants. 2 The form which was 

 assigned by Dawson to the genus Dadoxylon has been found to be 

 identical with Voltzia coburgensis Schaur., from the Lettenkohle 

 and Lower Keuper of Germany. The other form is Equisetum 

 rogersii, Schimper, which has been described by Fontaine from 

 the Virginia Triassic. 3 



The correlation of these forms is also considered by Miss 

 Holden. The Voltzia is apparently the same as the form described 

 by Newberry as Palissya from the New Jersey area, 4 and as the 

 form Cheirolepis from New Jersey and Virginia. The Equisetum 

 rogersii is probably identical with E. columnaris, described by 

 Bronn, from the Lettenkohle. 



Fragmentary fish remains have been found by Haycock 5 at 

 Scots Bay in the calcareous sandstones overlying the basalt. 

 Recently further collections have been made by Professor 

 Haycock and the material has been identified by Mr. L. M. 

 Lambe, of the Geological Survey of Canada, as probably Semio- 

 notus fultus (Agassiz), a form common to the other Newark 

 areas. 



1 J. W. Dawson, Acadian Geology, 3d ed., 1878, p. 108; also, Notes and Addenda, 

 p. 99. 



2 Ruth Holden, "Fossil Plants from Eastern Canada," Annals of Botany, XXVII 

 (1913), 248-54. 



3 W. M. Fontaine, U.S. Geol. Surv., Mono. 6, 1883. 



4 J. S. Newberry, U.S. Geol. Surv., Mono. 14, 1888. 



s E. Haycock, "Records of Post-Triassic Changes in Kings County, Nova Scotia," 

 Trans. N.S. Inst. Sci., X (1900), 287-302. 



