146 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



crops all around the summit with Tertical sides 10 to 20 feet high. The summit or 

 table top is covered with moss and grass and several large bowlders of glacial origin. 

 At its southeastern extremity it is joined to the range of mountains running par- 

 allel to the mount and rising to altitudes of from 500 to 800 feet. Between the 

 mount and neighboring mountain side flows a good-sized brook, flowing northwardly 

 ^ and out into the valley between the 



-A NEAR VIEW OF SlLLIMAN'3 FOSSIL MOUNT. 



(Pliotograph by li. "W. Porter.) 



greater and lesser mounts. 



This brook has probably caused the 

 separation of these two elevations, 

 and has carried a quantity of clay 

 and limestone out into the valley for 

 several hundred yards. 



A close scrutiny of the adjacent 

 mountain range revealed no limestone 

 formation on its side. The rock of this 

 range is a dark mica-schist, the dips 

 making an angle of about 30° with the 

 horizon. Its surface in many places 

 shows the marks of glaciation (one 

 moraine lying against the northern 

 side of the smaller mount), but for the 

 most part the parent ledge is hidden 

 under a quantity of its own rock 

 broken up by frost action. 



I found a great number of limestone 

 bowlders, erratics, scattered through 

 the valley of the Jordan Eiver aud on 

 the sides aud summits of the moun- 

 tains which border it. 



Finally, it may be interesting to 

 know that the natives told me that 

 these same formations containing fossils existed in several localities in the lake 

 region of the interior. 



Very truly, yours, Eussell W. Porter. 



Region ivest and northwest of FrohisJier Bay. — From Mr. Porter's 

 account of Silliman's Fossil Mount, it is evident that similar Lower 

 Silurian strata occur in the lake region of the interior of Baifin Land. 



Mr. E. M. Kindle^ reports that Missionary Peck obtained from Lake 

 Kennedy, which lies northwest of the head of Cumberland Sound, the 

 following' drift fossils: 



Zaphrentis sp. ? [probably Streptelasma corniculum]. 



Halysites catenulatits [probably var". gracilis Hall]. 



Maclurca magna ? [probably Maclurina manitobensis], 



Endoceras proteiforme. 



With the fauna of Silliman's Fossil Mount as a guide, it is probable 

 that no horizon other than the Trenton is indicated by the species cited. 



Dr. Eobert BelP reports that — 



On ice pans farther up the coast [from Big Island in Hudson Strait], or to the 



1 Amer. Journ. Sci., 4th ser., II, 1896, p. 456. 



2 Observations on the Geology, etc., of Hudson Strait and Bay, made in 1885. Ann- 

 Eept. Geol. and Nat. Hist. Survey of Canada, new ser., I, 1885, pp. DD. For a sum- 

 mary of North American Arctic geology see the report of the same Survey for 1886, 

 II, 1887, p. E. 



