CONTENTS. ix 



appears to be objectionable. LyelPs statement of this theory abridged. 

 The nature of the objections about to be advanced, and the order 

 in which they are proposed to be discussed - Page 212 



CHAPTER XII. 



ARE THE PRIMARY SCHISTOSE ROCKS STRATIFIED ? 



Definitions of the term stratum not satisfactory yet the basis of 

 modern classifications. If primary slates be stratified so are also the 

 granitic rocks. Primary slates and sedimentary deposits said to be 

 analogous proofs thereof advanced by Lyell. This opinion of their 

 common origin combated for, according to this evidence, the igneous 

 rocks are analogous to the stratified which involves a contradiction. 

 Granite said to be occasionally stratified. Whence this contrariety 

 of opinion? Attributable to the structure of rocks common to the 

 individuals of every geological epoch, and every mode of origin. 

 Not dependent on the successive depositions but superinduced during 

 consolidation. This no new doctrine as regards igneous rocks ought 

 to be extended to aqueous deposits. The structure of rocks a variety 

 or mode of crystallisation. This subject demands farther investigation. 

 Conclusion primary slates not stratified, in the usual acceptation of 

 the word ----._ 230 



CHAPTER XIII. 



HAVE THE PRIMARY SCHISTOSE ROCKS BEEN ELEVATED INTO 

 THEIR PRESENT INCLINED POSITIONS BY PLUTONIC AGENCY? 



Points proposed for discussion the proofs of elevation and the 

 existence of an elevating power. Position of tubulites in strata of 

 Shropshire. Elevated strata of conglomerate in Suffolk, at Helford 

 Harbour at Bad-na-Bae. Inclined fan-shaped strata of Caithness. 

 Depositions on inclined planes. Calcareous grit of Palagonia. Shingle 

 strata at Monte Calvo. Inclined strata of vast extent. The vertical 

 strata of the Isle of Wight. The nature of igneous elevations. 

 Igneous operations now in action earthquakes volcanos elevation 

 craters not generally admitted. Changes in the relative level of sea 

 and land. Temple of Serapis coast of Chili ancient beaches 

 subsidence of the Baltic sea-cliffs and caves inland sub-marine 

 forests. Phenomena of trap rocks their position in the strata of 

 Sicily, Sky, and Pembrokeshire. Protrusion of granite in a fluid and 

 solid state disputed. De Beaumont's theory. Position of strata 

 next granite not always easily determined. The bearings of primary 

 strata not obvious layers of these rocks threefold continuous with 

 those of granite. Conclusions - 257 



