246 The American Geologist. April, i89o 
point examined and the regular occurrence of the overlapping Cambrian 
sediments. 
The superficial geology deals principally with the occurrence of 
glacial striie and the distril>ution of the boulders and other drift. 
There does not appear to be any well defined evidence of an immense 
ice sheet, the strite and most of the boulders indicating merely the 
work of local glaciers, which were discharged apparently from the 
several elevations found in the area into the St. Lawrence valley on the 
west, and the upper waters of the St. John on the east. The presence 
of scattered Laurentian boulders at many points, as well as the gold 
drift of the interior, both of which are from north to south, are ac- 
counted for by the agency of water and drift ice, probably floes, such 
as are found at the present day along the lower St. Lawrence, rather 
than by glacier action. The presence of old pre-glacial river channels, 
excavated many feet below the present bed of the several streams, is 
pointed out. These have been filled with gravel, sand and clay, long 
prior to the deposition of the boulder clay, and it is from these old 
pre-glacial channels that the richest results in gold mining are now 
obtained. 
A list of the fossils enumerated in the body of the report has been 
systematically tabulated by Mr. H. M. Ami, and forms a supplement, 
which presents in concise form the several localities from which these 
have been obtained and the zones to which they pertain. 
Report of explorations and surveys in portions of northern New Bruns- 
wick and adjacent areas in Quebec and in Maine, U. S. By L. W. 
Bailey and Wm. M. Innis. (with map.) 
In previous reports by the same authors the general topographical 
features of the district indicated in the title have been described as 
well as the lithological characters and distribution of its various rock 
formations. In the present report the information previously gathered 
is summarized and comparisons are instituted between the Silurian 
system as exposed in this section and in southern New Brunswick, 
Maine, and at various points in Quebec. The northern edge of the 
Silurian is followed from Gasp^ peninsula to Temisconata lake, and 
the close correspondence in sequence of the beds exposed at the 
Neegette falls, Rimoriski river, Temisconata lake and at many other 
points is shown by descriptions of sections at those points with lists of 
the fossils which each has afforded. The great area of bluish-gray, more 
or less calcareous slates which occupy the southern part of lake 
Temisconata, the Madawasha river and a large portion of the St. 
John river is held to be probably of Lower Helderberg age and to 
represent the upper and more shaly portions of the Gaspe limestone 
series, being possibly their deep water representatives. Older por- 
tions of the Silurian as low as Niagara, or possibly Clinton, are how- 
ever brought up by anticlines which occur within this area, notably at 
the Sagus river and on the Aristook river, Maine. Descriptions of 
numerous sections in the state of Maine are given with accompanying 
