( ' ovrespondence, l-M 
is a sandstone of variable character. For the mosl pari ii is sofl and 
friable. Ii is generally chivy, mid its color varies from bluish gray to 
yellowish, according to the stage of oxidation. A section is exposed in 
the cuttings above the reservoir, bid the bedding is indistinct. The 
rocks in general are ver^ similar to the sofl sandstones which have 
thick .'iiid extensive beds of lignite associated with them in the vicinilx 
of Chehalis. Il is ven probable thai the sandstones in which the fos- 
sils occur and those in which the lignites occur are pari of the same 
geological scries. The fossils have been submitted to Mr. T. \V. Stan- 
ton of the U. S. Geological Survey, who has kindly examined them. 
Be reports thai "thej include species of Soldi. Lida, Tellina, Venus, 
Fusus, Dentalium, and others. As these are all marine forms thej can- 
not be compared with the brackish water fauna of the Pugel group. 
Two or three of the species resemble Tejon (Eocene) Tonus, hui as the 
material is nol sufficient for positive identification, and as closely re- 
lated species also occur in the .Miocene, ii is nol possible to assign them 
to a definite horizon. Thej are either Eocene or Miocene." 
The interest attaching to these fossils is their bearing an the correla- 
tion of the Pugel group, which com prises the lignite-bearing forma- 
tions of Washington, The sediments composing ii are ven voluminous, 
and the presence of the lignites gives il considerable economic import- 
ance. So far. however, the age of the Pugel group has nol been pre- 
cisely determined, from the fad thai the fossils found in it are not ma- 
rine and are therefore nol easih compared with 1 hose of possibly equiv- 
alent formations of the coast, lien', at Chehalis, we have marine fos- 
sils, which are either Eocene or .Miocene, in a portion, apparently, of 
the lignite-bearing series. If the occurrence of lignites in thick and 
repeated beds ma\ he taken as a diagnostic feature of the Pugel group, 
we seem here to have the marine extension of the esttiarine formations 
recognized by Dr. White as constituting the bulk of thai group of si rata. 
The fossils here reported were collected hurriedh in less than all hour. 
A more careful examination of 1 he Held would doubtless \ ield sufficient 
fossils to determine definitely whether the Chehalis sandstone is of 
Eocene or Miocene age, and it is the Writer's hypothesis that 1 his would 
also determine the age of the Puget group. 
Andhkw < '. Lawhon. 
Geol. Laboratory, Unit, of California, Berkeley, Cal, .Inn. ?9,1894. 
Note on the Keweenawan rocks of Grand Portage island, north 
(oast ok i.akk Superior. In his monograph on the copper-bearing rocks, 
Prof. 1 1. I). Irving states that on this island can be seen the junction be- 
1 ween the K'e wee ii a wan a ml the upper in osi beds of the Animikie (Upper 
lluroniaii. )•"• Since then little Ijghl has been thrown on the relations of 
these two series in Minnesota, and the writer is aware of no other pub- 
lished interpretation than that given bj Irving having been pul on the 
rocks of this isla nd. 
*The Copper-Bearing Rooks of Lake Superior ; U. S. Geol. Survey, Moi \. pp.297, 
367, 405, and fig. 16 on i>. 297 ; 1883. 
