2 PROCEEDINGS OF THE DETROIT MEETING. 
Henry Farrcniirp Oszorn, Sc. D., Columbia University, New York, N. Y. Pro- 
fessor of Zoology in Columbia University, and Curator in Vertebrate Paleon- 
tology, American Museum of Natural History. 
EpmunpD CHAsn QvuERBAU, Ph. B., Ph. D.,Svracuse, New York. Professor of Geol- 
ogy, Syracuse University. 
Grorece Oris Smira, A. B., Ph. D., Washington, D. C. Assistant Geologist, U. S. 
Geological Survey. 
Wiiiuiam Grorcr Ticgut, B. S., M. S., Granville, Ohio. Professor of Geology and 
Biology, Denison University. Engaged in glacial geology. 
JoHan Aueust Uppen, A. B®, A. M., Rock Island, Illinois. Professor of Geology 
and Natural History in Augustana College. 
After some announcements the President declared the reading of papers 
in order, under the customary rules. The first paper was— 
GRANITE MOUNTAIN AREA OF BURNET COUNTY, TEXAS 
BY FREDERIC W. SIMONDS 
The second paper was entitled : 
STRATIGRAPHY AND STRUCTURE OP THE PUGET GROUP, WASHINGTON 
BY BAILEY WILLIS 
[ Abstract] 
Contents 
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Physiography 
Stratigraphy 
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INTRODUCTION 
The article of which the following pages form an abstract is the result of field 
work conducted in the years 1881 to 1884 for the Northern Transcontinental Survey, 
and in 1895 and 1896 for the U. S. Geological Survey. The district particularly 
described is that which lies east of the southern portion of Puget sound, extending 
from the vicinity of Seattle to the foothills of mount Rainier. Most of the localities 
are comprised within the area of the Tacoma quadrangle of the atlas of the United _ 
States. 
PHYSIOGRAPHY 
The water bodies of Puget sound occupy deep and steep-sided channels in an 
elevated expanse of gravelly deposits, which is further divided by valleys that were 
formerly arms of the sound, but which are now filled with alluvium. The escarp- 
ments of the gravelly plateaus rise from 200 to 300 feet above the waters of the 
Sound and the alluvial plains of its former branches. The surfaces of the plateaus 
present a great variety of smooth and hummocky levels, supporting occasional 
rounded hills a hundred feet or more in height. All the aspects of the district are 
characteristic of forms modeled by extensive glaciers, and the individual features: 
a 
