164 



INDEX, 



Page. 



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



Chains, transition, general magnetic range - 43 



Mountain, their respective chronologies - -68 



Chalk, 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 



Coteau de Prairie, reconnoissance from Washington to - 95 



Apparent height - - 153 



Adjacent country - - 154 



Route to the Missouri - 155 



Cotoctin mountains .......93 



Cretaceous group, partly deficient in the United States - 58 



D. 



Diamonds in geodes - - - - - 78 



E. 



Eatatenka 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 - - 122 



Fossils of equivalent strata, why not identical - - 92 



Calamites, &c. on the Potomac - 97 



In beds at Licking creek, Maryland - - 102 



Fucoides Alleghaniensis, remarkable position of - 104 



At Bedford springs, Pennsylvania - - 109 



