VI 



CONTENTS. 



GEOLOGY OF ARRAN. 

 Physical Features 



Mountain nucleus Hill ranges Heights of moun- 

 tainsSouthern plateau, . . . . 42, 43 61-64 



Outline of the Geology 



Abnormal position of the granite Limits of the 

 other rocks Coarse and fine granite Age of 

 the sandstones, . . . . . . 44-48 64-71 



The Outlying Granites 



Ploverfield granite Granite of Craig-Dhu Dis- 

 cussion of the age of the various granites, . . 49-54 71-79 

 The Trappean Rocks 



Their limits Mineral distinctions Dikes Their 



number and range, ...... 55-57 79-84 



Glacial Phenomena 



Evidences of glacial action Dispersed blocks 



Special phenomena of A rran, . . . . 58-60 84-91 



EXCURSIONS IN ARRAN. 



I. To the Summit of Cior-Mhor 



Its advantages as a first excursion The Brodick 

 Monolith Brodick limestone, and section of strata 

 Glen Rosa Granite junction The Garbh-Alt 

 chasm Grand scenery Dikes of pitchstone and 

 basalt Mountain plants The Ceims Jagged 

 outline due to dikes Summit of Cior-Mhor 

 Effects of light, 61-69 92-105 



II. To the Corriegills Shore 



The coast sandstones Dikes of greenstone, clay- 

 stone, and pitchstone The great boulder Scenery 

 The Dunfion range, and old fort Pitchstone 

 and porphyry New fossil Evening aspects, 70-77 106-116 



III. To the Summit of Goatfell 



Meaning of the name Section on the ascent 

 Junction at Milldam, and singular dike Cyclo- 

 pean walls View from the summit Maoldon 

 Granite junction The great Corrie boulder, 78-84 116-123 



IV. The Way-side Museum, .... 85 124, 125 

 V. The North Shore 



Corrie as a centre for excursions The Corrie 

 beds Granite boulders The Anticlinal axis 

 Carboniferous strata, and list of fossils Uncon- 

 formable beds at Newton Point Loch Ranza 

 Castle Scenery Evening at Catacol, . 86-92 126-135 



