310 Mineralogy and Geology of a part of Nova Scotia. 



of tabular greenstone, rising from the base of the preci- 

 pice in huge sheets vertically inclined, and sometimes di- 

 vided into separate blocks, which lie one above another with 

 their reposing surfaces perfectly flat, and without exhibiting 

 that peculiar relation of contact, which is so often observed 

 in distinct columnar trap. Indeed, there are other apparent 

 discrepancies in regard to the internal appearance of this 

 trap, when compared with that from Little River. Its tex- 

 ture is coarser, and by careful inspection, the laminae of feld- 

 spar may be distinguished from the other ingredients. Its 

 specific gravity is also less ; and from the abundance of 

 hornblende and green earth, it assumes a distinct greenish hue. 

 Nearer the head of the cove, the height of the precipice 

 gradually declines, and finally for its continuation, a bank of 

 brecciated and amygdaloidal greenstone is substituted, con- 

 taining imbedded nodules of the different zeolite minerals. 

 Mention was made of this interesting spot in a former num- 

 ber of the American Journal ; but as the second and more 

 attentive visit to it, brought to light many new veins, af- 

 fording specimens of surpassing beauty, we are authorized, 

 at the expense of repetition to notice all the minerals of this 

 locality, as well as many others, which have come within the 

 scope of our united researches. This we deem necessary 

 to mention, as it is the object of this communication to em- 

 brace all the known facts and observations, which may con- 

 duce to the fulfilment of its title. 



At this place occur geodes of chalcedony, invested with 

 greenstone breccia, lined on the inner surface with beauti- 

 ful crystals of stilbite, and sometimes with a delicate white 

 filamentous substance resembling fibres of cotton. It is ap- 

 parently fibrous mesotype, similar to that found by Dr. Mc- 

 Culloch, in the Island of Skye. Also interesting specimens 

 of quartz are found at this place, in the form of the primary ob- 

 tuse rhomboid, in a few instances perfect, and more than three 

 eights of an inch in diameter ; but usually the crystals are 

 modified by the absence of solid angles and replacement of 

 single planes, which by their extension, tend to produce the 

 common six sided pyramids. Only one pyramid of each 

 crystal however, is visible, as the base from which the other 

 would proceed passes into massive quartz without the inter- 

 vention of lateral planes. 



The amygdaloid is traversed by narrow and indistinct 

 veins of specular iron ore, sometimes hollow and enclosing 



