| Still later, dolerite sills and sheets and dikes of granophyre and quartz felsite followed in the same region. |
| Granophyre and hybrid pipes in dolerite layer of Slieve Gullion. |
| They are pecked or abraded on heavily jointed and fractured gabbro and granophyre igneous rock surfaces that have weathered into massive linear piles. |
| Some 600 m below this breccia the pluton is pervaded by a fine-grained granophyre, apparently the product of a sudden and final crystallization. |
| The sample consists of light grey, sparsely porphyritic, aphanitic rhyolite with potassium feldspar, and lesser amounts of quartz and granophyre phenocrysts. |
| This is the essential distinction between a granite and a quartz-porphyry or a granophyre. |
