376 ARRAN. GEOLOGY. SECONDARY STRATA. 



minant in this bed as the rubble is in the other. But 

 it is not every where of this character, since the conglo- 

 merate occurs in it, and even in considerable quantity; 

 particularly in the vicinity of the Cock.* The con- 

 glomerate indeed, both here and elsewhere, alternates 

 in a very irregular manner with the fine sandstone, being 

 sometimes at the bottom, sometimes at the top of a 

 bed ; and not unfrequently it happens that the bed which 

 in one place is sandstone, passes laterally in another place 

 into conglomerate. I must remind the reader that as 

 this sandstone continues to dip to the north, it is con- 

 sequently far removed from the great bed described at 

 Scriden, being separated by all the intervening small 

 strata. An incorrect examination of this shore, would 

 readily lead the spectator to confound these two distant 

 beds together. 



Where this great mass ceases, there is no longer any 

 extensive collection of strata found following it, but the 



O ' 



fragments or portions of another series commence. These 

 are limited to the shore, being abruptly broken off, and 

 not extending up the mountain like the former. It is 

 at the outer extremity of these that the junction, formerly 

 described when speaking of the schist, is to be seen, and 

 here the secondary strata at length entirely disappear. 

 The lowest bed of this series in immediate contact with 

 the schist, and where it is most readily examined, is 

 a conglomerate limestone containing schist and quartz. 

 This is followed by a sandstone conglomerate, and by 

 red sandstone ; but whatever has once existed above 

 these is now wanting. Different substances are however 

 to be seen in other places near this junction, and on 

 the upper side of the last described great sandstone bed ; 

 namely, alternations of the red, white, and spotted sand- 

 stones ; together with schistose marJes, or shales, cal- 



* This convenient point of reference is not u headland, but a de- 

 tached block of sandstone sufficiently resembling u fowl lo \\arrant Un- 

 its nautical denomination. 



