366 WHITE AND SCHUCHERT—CRETACEOUS SERIES OF GREENLAND. 
strong coastward dips, as well as the low altitude of the Tertiary at its 
eastern border on the south side of the peninsula (Atanikerdluk), are 
probably due to inequality in the post-Tertiary epeirogenic movements. 
(3) The sediments appear to have been derived from the east, since 
the light-colored sandstones and conglomerates are most abundant on 
that side of the sedimentary belt (Kook, Kaersut), where marine fossils 
appear to be wanting. At one of the eastern localities (Ujarartorsuak) 
fresh-water shells occur-with plants. To the west, dark homogeneous 
shales with abundant remains of marine animals predominate. 
(4) Sedimentation appears to have been continuous in some portion 
of this region throughout Cretaceous and early Tertiary times, since no 
marked unconformities or unmistakable evidence of interruption of 
deposition have been seen. In certain sections, however, there appears 
to be, either in a variable thickness of the series or a slight difference of 
attitude, evidence of movements or erosion prior to the imposition of the 
Tertiary basalt cap, though these may be only local or of minor extent: 
-But in many well exposed sections there is no local trace of sedimentary 
discontinuity between the Mesozoic and Tertiary. 
(5) The entire thickness of the clastic deposits is probably over 3,500 
feet. They are divided by Heer into four series, on the basis of their 
vegetable contents. Of the lowest of these, the Kome series, developed 
on the north coast of the peninsula, a thickness of probably not over 
700 feet is exposed above tide. he discovery of additional dicotyledons 
in the Kome series, from which hitherto only Populus primeva was 
known, and which was regarded as Urgonian in age by Heer, casts serious 
doubt on the reference of those beds to so low a stage in the Lower Cre- 
taceous. The flora as a whole is, however, to be compared with that of 
the Virginian Potomac formation, with some, perhaps the upper, portion 
of which the Kome series is probably synchronous. 
The Atane series, hitherto not positively known on the north shore of 
Nugsuak peninsula, is clearly present at Ujarartorsuak with character- 
istic Atane plants. Farther west, at Kook Angnertunek and Niakornat, 
the dark homogeneous shale series probably represents both the Atane 
and Patoot members of the Upper Cretaceous, since of the marine organ- 
isms found here some are identical with those occurring at Ata and 
Patoot, the typical localities for the two divisions of the Upper Creta- 
ceous. The marine invertebrates from the Atane series, which Heer 
correlated by means of fossil plants with the Cenomanian of Europe, 
strongly indicate that the series is to be correlated with the Fort Pierre 
and Fox Hills or Montana formation of the western United States. 
Paleobotanically the Atane series is so closely related to the Vineyard 
series of Marthas Vineyard, the Amboy clays of the Raritan region of 
