Along the South Shore of Lake Superior |
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alteration arch argillite Azoic Bank basaltic beach beautiful black bass bluff boats chemically Chippewas chlorite cliff conglomerates copper copper-bearing rocks country rock cross deep deposits detrital diabase dikes diorite DULUTH east eastern eruptive rocks Falls fault fifty feet fishing fissures forest Foster and Whitney French geologists gneisses Gogebic Lake Grand granite greater or less hematite hills hornblende Houghton hundred and fifty hundred feet Huron Indian iron Ishpeming island jaspilite Keweenaw Point known Lake Superior lava flows Mackinac Mackinac Island magnetite Marquette masses melaphyr Michigan miles mineral mines Munising Nature original percolating waters peridotite picturesque portion present writer Presque Isle quartz quartzites railroad RAILWAY reached region rhyolites River sandstone Sault Sault Ste schist sedimentary seen serpentine shore of Lake side SOUTH SHORE stream structure summer tion tourist trout veins vicinity volcanic whitefish wonder woods
Popular passages
Page 80 - ... hence the fissures are not generally widened in them, especially if they are in thick beds. At the time when the percolating waters were acting on the rocks adjacent to the fissures, they were also working in the rocks everywhere upon Keweenaw Point. In many localities the evidence is strong that the percolating waters were hot, while in others, as remarked by Marvine, no sign exists that they were above the temperature of the waters of the present day. These waters percolated with more or less...
Page 58 - Missilimackinac is an island famous in these regions, of more than a league in diameter, and elevated in some places by such high cliffs as to be seen more than twelve leagues off.
Page 80 - In the veins the copper is found intimately mixed with the gangue, or in sheets or irregular masses. In sheet form the copper extends downward or has its sides approximately parallel with the vein.
Page 55 - Mackinac," says a writer whom we have already several times quoted, "is charming. The geologist finds mysteries in the masses of calcareous rock dipping at unexpected angles ; the antiquarian feasts his eyes on the Druidical circles of the ancient stones ; the invalid sits on the cliff's edge in the vivid sunshine and breathes in the buoyant air with delight, or rides slowly over the old military roads, with the spicery of cedars and juniper alternating with the fresh forest-odors of young maples...
Page 76 - Azoic rocks, and are formed out of the débris of the latter. These sandstones form in Michigan the base of a new system of rocks known as the Palaeozoic, or ancient life, from its containing the earliest authentic remains of animal life. The sandstones are generally considered to be the equivalent of a sandstone in New York called the Potsdam sandstone — hence these rocks are said to be Potsdam. South of Carp River this sandstone can be seen lying against the Azoic quartzites and formed out of...
Page 35 - ... feet. The great cave whose door is the Portal, stretches back in the shape of a vaulted room, the arches of the roof built of yellow sandstone, and the sides fretted into fantastic shapes by the waves driving in during storms, and dashing up a hundred feet toward the reverberating roof with a hollow boom. Floating under the Portal, on a summer day, voices echo back and forth, a single word is repeated, and naturally the mind reverts to the Indian belief in grotesque imps who haunted the cavern...
Page 47 - O, special favourite of God, Eternal beauty cling Around thy banks — let all thy vines Together praise and sing, And o'er thee angels bend and pause With sheathed and reverent wing. Sweet river ! where the laughing hills Thy majesty do greet, And echoes call from rock to rock, All through the noonday heat, In earliest dusk the gathering stars Above thee love to meet. When lovers in the ferry-boat, Forget the passing tide, And closer drawn cling lip to lip, What though the river's wide, And silver...
Page 80 - ... fault shall later be proved to exist. Should such be the case it would account for part of the assumed thickness of the beds. (a) The before mentioned fissures seem to have been forme'd by powerful movements of different parts of the rocks that caused the cross fracture and dislocation of the latter. The movements were repeated from time to time, causing a rubbing, grinding, breaking and polishing of the parts adjacent to the fissures. After the main fissures had been formed, the subsequent movements...
Page 57 - Indian treachery, and of the white man's duplicity. To-day, chanting Te Deums beneath the ample folds of the fleur-de-lis, tomorrow yielding to the power of the British lion, and, a few years later, listening to the exultant screams of the American eagle, as the stars and stripes float over the battlements on the "isle...
Page 51 - The beds forming the summit of the arch are cut off from direct connection with the main rock by a narrow gorge of no great depth. The portion supporting the arch on the north side, and the curve of the arch itself, are comparatively fragile, and...