CONTENTS. 



Chap. Page. 



XXII. Oil changes in the disposition of the Sea 



and Land . . ... 1 



PART II. 



XXIII. Classification of Rocks .... 65 



XXIV. Granite ...... 81 



XXV. Overlying and Trap Rocks . . .102 



XXVI. Gneiss. Compact Felspar . . .141 



XXVII. Micaceous Schist. Chlorite Schist. Tal- 



cose Schist . . . . .157 



XXVIII. Hornblende Schist. Actinolite Schist . 1/0 



XXIX. Quartz Rock. Red primary Sandstone . 174 



XXX. Argillaceous Schist . . . .184 



XXXI. DiallageRock ..... 193 



XXXII. Serpentine . . . . . .197 



XXXIII. Limestone. Primary .... 207 



XXXIV. Lowest^ or old red, Sandstone . . 213 

 XXXV. Upper Sandstones ... .225 



XXXVI. Secondary Limestones . . . . 235 



XXXVII. Shale, Clay, Sand, Marl . . .248 



XXXVIII. General Remarks on the Secondary Strata 255 



XXXIX. Pitclistone .... .2(5(3 



XL. Jasper, Siliceous Schist, Chert . 273 



- XLI. Gypsum, Rock Salt . 288 



XLiL Coal . 295 



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