318 E. M. KINDLE 
relate to Mesozoic terranes. In his observations on Glacier Bay 
Professor Emerson revives an old error by referring the limestones of 
that locality to the Carboniferous,’ unaware, apparently, that they 
had been shown to be of Silurian age.? 
Quite recently Brooks has briefly summarized the more essential 
facts concerning the stratigraphic succession in southeastern Alaska.3 
A small-scale geologic map of the whole of Alaska, so far as covered 
by surveys, accompanies this report. In this paper appears the first 
notice of the presence of Silurian horizons at Freshwater Bay and 
Kuiu Island. 
ghowing orca covered 
by 
GEOLOGIG RECONNAISSANCE MAP 
OF SOUTHEASTERN ALASKA, 
GENERAL GEOLOGIC RELATIONS 
Southeastern Alaska is a region in which a wide range of geologic 
agencies have operated to produce a complex and intricate strati- 
graphic record. Volcanic and igneous rocks, either as surface flows 
or as intrusions, have been developed in this area at frequent intervals 
t Harriman Alaska Expedition, Vol. IV (1904), pp. 16-23. 
2 A.H. Brooks, Professional Paper No.1, U.S. Geological Survey, 1902, pp. 19-21. 
3 “The Geography and Geology of Alaska,” Professional Paper No. 45, U.S. 
Geological Survey, 1906, pp. 208, 210, 211, 219, 221, 222. 
