EDITORIAL 639 
“The Granite Mountain Area of Burnet County, Texas.” By FREDERIC 
W. Srimonbs, Austin, Texas. 
“Exposures near Detroit of Helderberg Limestone and Associated 
Gypsum, Salt and Sandstones.” By W. H. SHERZER, Ypsilanti, Mich. 
“Notes on the Geology of the Lower Peninsula of Michigan.” By 
ALFRED C. LANE, Houghton, Mich. 
“The Nomenclature of the Carboniferous Formations of Texas.” By 
ROBERT T. HILL, Washington, D. C. 
“Stratigraphy and Structure of the Puget Group, Washington.” By 
BAILEY WILLIS, Washington, D. C. 
‘The Loess as a Land Deposit.”” By J. A. UDDEN, Rock Island, II. 
“Tce-transported Bowlders in Coal Seams.”” By EDWARD ORTON, Col- 
umbus, O. 
‘““Clay veins Vertically Intersecting Coal Measures.” By W. S. GRrEs- 
LEY, Erie, Pa. 
“Analogy Between Declivities of Land and Submarine Valleys.” By 
J. W. SPENCER, Washington, D. C. 
“Great Changes of Level in Mexico and the Interoceanic Connections.” 
By J. W. SPENCER, Washington, D. C. 
sal 
Papers offered at the Session of the Geological Section of 
the American Association for the Advancement of Science, 
Detroit, August 11-13, 1897: 
Address of VICE-PRESIDENT WHITE. Subject: ‘‘The Pittsburg Coal 
Bed.” 
“The Geological Age and Fauna of the Huerfano Basin in Southern 
Colorado.” By PROFESSOR HENRY F. OsBporn, Columbia University, New 
WionknNh Ys. 
“An Account of the Researches relating to the Great Lakes.’’ By Dr. 
J. W. SPENCER, Washington, D. C. 
“Lake Chicago and the Chicago Outlet.” By FRANK LEVERETT, U. S. 
Geological Survey, Denmark, Ia. 
“The Lower Abandoned Beaches of Southeastern Michigan.” By 
FRANK B, TAYLOR, Fort Wayne, Ind. 
“Some Features of the Recent Geology around Detroit.” By FRANK B. 
TAYLOR, Fort Wayne, Ind. 
“Recent Earth Movement in the Great Lake Region.” By G. K, 
GILBERT, U. S. Geological Survey, Washington, D. C. 
