No. 3. The Physiography of Acadia. By RecinaLp A. DALY. 
TABLE OF CONTENTS. 
PAGE PAGE 
Introduction: The Unity of the Ap- Warping of the Upland Peneplain 87 
palachian System; Data of The Second Cycle: Development 
the Investigation Pe fb. of the Triassic Lowlands . 88 
The Uplands ...... . . . 75} The Geological Dates of the 
The Southern Plateau . 75 Peneplains. . . ee eee ae 
Structure . : 75) The Carboniferous Rewind 2 98 
Form: an Gid-ainntain Pla- Dissection of the Tertiary Pene- 
teau; Theories of Origin . 76 plain; Drowning and more 
Extension of the Southern Pla- Recent History of the Ter- 
TeameHacetve ss ts) 1 te 2 12 fiery’ beneplain oe an noD 
The Cobequid Plateau. . . 83}Summary . . 97 
The New Brunswick Highlands: 84] Homologies of Lard: festa aad of 
North Mountain, Digby Neck, the Determining Structures 
and Long Island .. . 84 in Acadia and New England 98 
The Bay of Fundy Trough in BibDMOeTAp AN mercer: Calc ao eer ue oO 
Geological Time . . . . 85|Explanationof Plates... . . 103 
Introduction. 
THe results of many independent workers in the old-mountain 
Appalachian belt of eastern North America have shown that, as re- 
gards axial trends, formational composition, and structure, the uplands 
and lowlands from Georgia to Gaspé belong to one system. The unity 
of the whole is the result of both orogenic and epeirogenic movements ; 
the former leading to the fairly steady accumulation of Paleozoic sedi- 
ments on a subsiding sea-floor, and to the filling with Triassic sand- 
stones of basins produced in Nova Scotia, New England, New Jersey, 
and Virginia during Permian warping; the latter inducing the great dis- 
order referable to the Carboniferous “ Revolution,” and the simpler but 
important block-faulting in Jura-Cretaceous time. Besides these periods 
of wide-spread and pretty general mountain-building, other epochs of 
more local deformation were characterized by synchronous folding in 
limited parts of the belt. Extensive mountain-building occurred during 
the middle Silurian folding of Acadian and of western New England 
VOL. XXXVIII. — NO. 3 
