This earthcache is just off The Cabot Trail, inside the Cape Breton Highland National Park. You will be required to have a valid park pass to visit the earthcache.
To log this earthcache, please don’t stress about answering the questions. Simply send your best attempts in a private message to me, (the cache owner), and then go ahead and log it as found.
You don’t need to wait for my approval. All attempts will be accepted.
Go ahead and have fun learning! 
- [REQUIRED] Please post a photo in your log of yourself or a personal item at the outcrop to prove you visited the site.
- Using the chart on the bottom of this page, tell what type of rocks these are, including the main rock type, plus the rock type of the dykes running through it.
- If there is more than one kind of dyke running through the rock, please list how many different rock types you see, and why you think they are that specific rock type.
The Devonian period was a time of tectonic chaos for the microcontinents of Ganderia and Avalonia. Plate motion drove them grinding and jostling against one another over millions of years. Portions of continental crust were forced to great outcrop depths and some melted, yielding granite magma. This extensive, well-exposed outcrop provides professionals and amateurs alike with a textbook-quality example of the granite intrusions.
Here at Green Cove, you can see the evidence of these collisions, with granite outcrops criss-crossed with other types of rock.
Fragments of older crust such as biotite schist were carried along in the intrusion as it moved upward. Other rock types, such as the Cameron Brook granite, aplite, pegmatite, and biotite schist were also caught up in the biotite granite magma as it moved through the older crust.
Green Cove
The granite here can have a plaid-like pattern, alternating pink and grey rock, because of the dykes that cut it. The granite itself is grey. The granite outcrops are criss-crossed with the following rock types dykes:
Rock types
| Cameron Brook Granite can be easily recognised by their large, well-defined crystals of pink feldspar. |
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| Aplite, a pale pink rock containing quartz and feldspar but little or no biotite. It has a fine, sugary texture. |
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| Pegmatite dykes are darker pink with large, clearly visible crystals of quartz, feldspar, and (biotite and muscovite). |
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| Biotite Schist has medium to large, flat, sheet-like grains in a preferred orientation (nearby grains are roughly parallel) |
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