28 



The Hawkeye Ornithologist and Oologist. 



For the Hawkeye 0. and 0. 



THE DEVIL'S TOWER. 



BY L. W. STILWKLL. 



There are a number of peaks and 

 buttes in the Black Hills of volcanic 

 origin. Crow Peak, Terry's Peak. 

 Bear Butte, Inyan Kara, etc., are 

 wonderful, but none stand out to 

 the wondering gaze of the over- 

 awed admirer as does the Devil's 

 Tower. 



The indications of these peaks, 

 genera'ly in the northern part of 

 the hills, is not that of overflowing 

 erruption, but rather of the pushing 

 through the crust of the earth of a 

 plastic material by volcanic force 

 from beneath. The bases of the 

 peaks show strata turned up edge- 

 wise and porphyritic trachyte and 

 rhyolite abound at. the places of in- 

 trusion. The Devil's Tower seems 

 to be the core of a volcano, the 

 walls having eroded and crumbled 

 away. 



This great rectangular obelisk 

 consists of an aggregation of crystal 

 like columns; nearly every individ- 



ual column extending unbroken from 

 base to summit, giving the entire 

 structure the appearance of a fas- 

 sicle of gigantic fibres. 



The rock is a greenish-gray San- 

 i.Un Trachyte. The great crystals 

 having generally a rectangular or 

 rhombic section, with sometimes a 

 triangular or hexagonal form, have 

 sides measuring; two to four feet. 

 One crystal 30 feet long has cleaved 

 from the mass and fallen flat to the 

 ground with a sharp edge upward, 

 broken out of place like one-eighth 

 of »n orange. 



The height from the Belii 

 Fourche river is 1126 feet iind it 

 rises 625 feet from the mound on 

 which it stands. Its width at the 

 base is 796 feet, and at the summit 

 376 feet. 



The Indians named it "Mato Tijii" 

 or Bear Lodge and called it "The 

 bad {rod's tower." hence the name 

 Devil's Towur. 



Eminent geologists who have ex 

 amined it say "'it is a remarkable 

 structure and appears not to have 

 been repeated elsewhere in nature 

 but stands alone, unique and mys- 

 terious." 



EXCHANGE NOTICES. 

 Notices under this heading inserted for 

 one-halt' cent per word but no notice will 

 be inserted for kess than 25 cents. 



WANTED— First-class eggs of Swallow-tailed 

 Kite, Prairie Falcon, Pigeon Hawk, American 

 Bittern, Wilson's Snipe, Solitary Sandpiper, 

 Bartram's Sandpiper, Baldpa'te, Blue and 

 Green-winged Ttal, Hooded Sheldrake, Noddy 

 and Sooty Terns. I can offer sets of Golden 

 Eagle, Iceland Falcon, Iceland Gulls, Skua 

 Gulls, and other eggs from the Arctic regions 

 W. Uaine. Walton St, 



Toronto, Canada. 



TO EXCHANGE— Bird's egg? ii sets with 

 full data for each set as I may w ant; also one 

 n w Ba lard Kith*, 23 ca!., for &.1.0 or to ex- 

 change for eggs in sets. Wanted the following 

 single eggs; Red-shouldered Hawk, Marsh 

 Sharp-shinned, and Broad-winged Hawks and 

 Osprey. Hexky W. Dam-, 



North Granville N. Y. 



TO EXCHANOE— First class eggs in sets 

 with foil data for V nickles without the word 

 cents on; also for j'l, 25 and 50 cent sain plas- 

 ters. Henky W. Davis, 



>.orth Granville. N. Y. 



