. Sixth annual report of the United States geological survey of the Territories, embracing portions of Montana, Idaho, Wyoming, and Utah : being a report of progress of the explorations for the year 1872. lley, the slopes arecovered with partially-ce-mented Post-Tertiary sandsand gravels, with occa-sional exposures of whitemarly clays, supposed tobe of the same age, thoughno fossils were seen. - Thegray sand-stones of thecanons are plainly the con-tinuation of the Tertiary (?)beds of Barlows Biverdirectly to the northward;and the limestones of thehigh cliifs at the head ofthe valley are probab
. Sixth annual report of the United States geological survey of the Territories, embracing portions of Montana, Idaho, Wyoming, and Utah : being a report of progress of the explorations for the year 1872. lley, the slopes arecovered with partially-ce-mented Post-Tertiary sandsand gravels, with occa-sional exposures of whitemarly clays, supposed tobe of the same age, thoughno fossils were seen. - Thegray sand-stones of thecanons are plainly the con-tinuation of the Tertiary (?)beds of Barlows Biverdirectly to the northward;and the limestones of thehigh cliifs at the head ofthe valley are probably ofQuebec (xroup age, perhapscapped with small bit of fine-grained,compact sandstone, foundloose on the rubbish-slopenear the top of the moun-tain by Mr. Brown, con-tains fragments of somethirty trilobites of the gen-era Gonocoryplie and Dicet-locepJialus (?). Suake Eiver escapes fromJacksons Lake at its south-eastern angle and runs offeastward to the valley ofBuffalo Fork before renew-ing its southerly , from the top of thebutte at the mouth of thelake, it is i^ainly seen thata broad valley extendsdirectly southward fromthe southern extremity ofthe lake; and it at once. GEOLOGICAL SURVEY OF THE TERRITOEIES. Z6d becomes a question why the river has thus deserted its own proper valleyand has turned off so far to the east to find another outlet. Four old ter-races are strongly marked along- the river, and the third, above its presentlevel, forms broad plains, on both sides of the river, below the mouth ofBuffalo. Moreover, the old river-gravel, consisting mostly of quartzites,runs to the top of the island-like knobs in the center of the valley aswell as of some of the hills which border it. Crossing westward overthese broad plains, which are mostly covered with sage-brush, exceptabout the isolated ponds, which seem to give evidence that much of thisthird terrace has been worked over by the river and cut up by bayous,we cross a narrow belt of spruces co
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Keywords: ., bo, booksubjectbotany, booksubjectmeteorology, booksubjectzoology
