164 



INDEX. 



Page, 



Castle rock, a curious pillar of sandstone - . . . 133 



Chains, transition, general magnetic range - - - - 43 



Mountain, thejr respective chronologies - - -68 



Chs.lk, deficient in the United States . . - . - 21 



Remarkable remains of this formation - - - 22 



Clay, slate - - - - - - - = 31 



Coal, bituminous, resting on unconformable rocks - - - 42 



Beds not dislocated in the United States - - - 50 



Found in Poland above the muschelkalk - - - 52 



At Frostburg, Maryland - - - . = - 105 



Remarkable locality near Savage river, Potomac - - 106 



Manner of shipping it at Sunderland - = - 107 



Estimate of its area in Pennsylvania - - - - 110 



Its quality dependent on vegetable species - - - 113 



At Rock river, Mississippi - - - - -159 



Column, geological ....... 24 



Conglomerates, origin of = = . 69 



Copper, carbonate of, on the Wisconsin .... 124 



At Mineral point - - - - - - 159 



Coleuu de Prairie, reconnoissance from Washington to - - - 95 



Apparent height ....... 153 



Adjacent country - 154 



Route to the Missouri - - - - - 155 



Cotoclin mountains 98 



Cretaceous group, partly deficient in the United States - - 58 



D. 



Diamonds in geodes 78 



E. 



Ealatenka lake - 156 



F. 



Falls of St. Anthony, heard from near St. Croix river - - - 134 



Description of ----- - 136 



Fault, meaning of the term ...... 72 



Great extent of - - - - = - 113 



Formation, explanation of ------ 19 



Fort Snelling, geology of 135 



Fort Winnebago, geology of - - - r - - 122 



Fossils of equivalent strata, why not identical - - - 92 



Calamites, 8ic. on the Potomac - - - - 97 



, In beds at Licking creek, Maryland - - - - 102 



Fucoides Alleghaniensis, remarkable position of - - 104 



At Bedford springs, Pennsylvania - - - - 109 



