Editing Augite-diorite of Camphouse and Faskadale Bay, Ardnamurchan - an excursion

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=== Locality 4 [NM 497 711]. ===
 
=== Locality 4 [NM 497 711]. ===
About 50 m along the coast, north­westwards from the northern gabbro/agglomerate contact, another contact is reached where a granophyre is intruded into the agglomerate. The contact is sharp and inclined southwards at a steep angle. Further inland a contact between granophyre and quartz-gabbro can be found at [NM 491 771] dipping to the south at 70°. and showing a chilled margin of granophyre against the quartz-gabbro. Thus the granophyre must represent the youngest of the three main intrusions examined on this trip and which are shown in North-South section.
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About 50 m along the coast, north­westwards from the northern gabbro/agglomerate contact, another contact is reached where a granophyre is intruded into the agglomerate. The contact is sharp and inclined southwards at a steep angle. Further inland a contact between granophyre and quartz-gabbro can be found at [NM 491 771] dipping to the south at 70°. and showing a chilled margin of granophyre against the quartz-gabbro. Thus the granophyre must represent the youngest of the three main intrusions examined on this trip and which are shown in section in Fig. 15b.
  
 
The granophyre is a typical non-porphyritic acid rock with alkali feldspar and quartz occurring in a micrographic structure.
 
The granophyre is a typical non-porphyritic acid rock with alkali feldspar and quartz occurring in a micrographic structure.

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