24 CONTRIBUTIONS TO THE GEOLOGY OF MAINE. [bull. 165. 
The classifications and correlations of these Anticosti and Gaspe for- 
mations remain substantially as they were given in this report in 1863. 
In the body of the work the Anticosti group is defined as follows: 1 
The remaining portion of the island is occupied by newer rocks, to which the 
name Anticosti group has been given. Their position in the geologic series is that 
occupied by the Oneida conglomerate, the Medina sandstone, the Clinton group, and 
the Niagara group of the New York geologists; but these subdivisions, although 
apparent in the w r estern basin, disappear in the Anticosti strata, which are litholog- 
ically unlike their equivalents in western Canada. 
This last remark also applies to the corresponding formations of 
Maine. The Maine terranes, numbered 1 to 5 in the list already given, 
although their age is clearly Eosilurian, differ from the New York 
terranes both in their stratigraphy and in the composition of the faunas. 
The limestones of Cape Gaspe appear to be a great development of strata of the 
age of the Lower Helderberg group. The fossils at the summit, however, bear a 
striking resemblance to those of the Oriskany formation, with which several of them 
are identical. It appears probable, therefore, that we have here a passage from the 
Lower Helderberg to the Oriskany, and the latter formation may be more especially 
represented by the lower part of the Gaspe sandstones. The organic remains dis- 
covered in these sandstones are as yet too few to enable us to separate the series into 
distinct members. We have already mentioned that a species of Renssekeria, identi- 
cal with or closely resembling E. ovoides, which occurs in the upper part of the lime- 
stones, is met with at 1,100 feet above the base of the sandstone series. This fact, 
together with the constancy in the lithological characters of the latter, makes it not 
improbable that at least this lower portion of the sandstones will ultimately be classed 
with the Oriskany formation. 
In the land plants there appears to be but little difference from the commencement 
of the series to the base of the red sandstones, a thickness of over 5,000 feet. These 
strata present analogies with the whole series of formations in New York, from the 
Marcellus shales to the summit of the Chemung sandstones, in all of which, accord- 
ing to Dr. Dawson, are found several of the species of plants that occur in the Gaspe 
sandstones. The whole of these 5,000 feet resemble, lithologically, the Portage and 
Chemung sandstones of New York, and it may hereafter be found that in this east- 
ern part of the continent the Oriskany fauna, which occurs at the base of this Devo- 
nian series, merges gradually, toward the summit, into that of the Portage and Che- 
mung group. In lithological characters the remaining upper 1,800 feet of the Gaspe 
series resemble the Catskill group of New York, which is regarded by Mr. Hall as 
the base of the Carboniferous system. As yet, however, no comparison can be 
made by fossils; those found in Gaspe being chiefly confined to a few obscure 
plants. 2 
On passing westward the formations lower than the typical Gaspe 
limestone of Cape Gaspe come into sight. "On the Chatte and 
Matanne rivers, on Lake Matapedia, and on the rivers Metis and 
Rimouski, the lower portion of this series of limestones appears to 
belong to the Anticosti group." 3 
This connection of the representatives of the Clinton-Niagara series 
directly upward with those of the Lower Helderberg, without indi- 
i Geol. Survey Canada. Report of Progress, 1863, p. 298. 3 Op. cit., p. 390. 
2 Op. cit., pp. 391, 403-404. 
