228 The American GeolocjisL April, 1S97 
sound. From the clearest evidence of increased elevation of 
insular, and partial!}^ insulated areas, where effects of erosion 
due to changes of level are the more obvious — as in raised sea 
beaches and shell beds, and, again, from redemption of delta 
deposits — it will finall}^ be shown (8) that partial emer- 
gence incidental to re-elevation has taken place during com- 
paratively recent periods. 
It will also appear that the origin of certain great fresh- 
water basins on the eastern border of the sound was in com- 
mon with that of the present tideways, as above indicated, 
and that they have been cut off from the maritime basin by 
])articipation in the moderate re-elevation already noted — 
])robably the last of the series of important regional oscilla- 
tions of level. 
The only survivals from baseleveling erosion which have 
come to my knowledge are several outcrops within the outer 
border of the sound, as above limited and defined, and mainly 
connected with what I may designate as the Restoration Point 
uplift of the Tejon formation. 
As far as I am aware, and as also stated by Dr. White, but 
a single outcrop of that formation has hitherto been made 
known to geologists.* This is an old quarry in soft, partly 
fossiliferous sandstone, known by Dr. White as Fossil blutf, 
near the mouth of the Duwamish river, at South Seattle. A 
number of marine molluscan fossils labeled as from this local- 
ity, in the possession of the Smithsonian Institution (Blatte 
collection) are referred by Dr. White to the Tejon epoch in 
common with all the Eocene strata recognized as such in Ore- 
gon. A collection of fossils and of fragmental vegetable pro- 
ducts from the same locality was obtained by me in the year 
1894. A much more prolific fossiliferous occurrence of the 
same formation will be indicated later on.f 
Non-fossiliferous parts of the same formation, under a high 
dip to the northeast, are exposed at intervals for nearly a 
mile to the south, in the east bluff of the Duwamish valley, as 
*Bull. U. S. G. S., No. 51, p. 31. 
fThe labels of the " Blatte collection " instead of implying two sepa- 
rate localities twelve miles apart, as inferred by Dr. White, doubtless 
refer to the single conspicuous outcrop noted above. No lake in the 
region is known as Duwamish. (See Bull. U. S. G. S, No. 51. p. 30; No. 
8,3, p. 106.) 
