| 1. | That magma crystallizes to mafic rocks such as gabbro and basalt.
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| 2. | Pyroxene and feldspar are the major minerals in basalt and gabbro.
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| 3. | Modern petrology would classify the teschenites as an analcime bearing gabbro.
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| 4. | The presence of orthoclase indicates a petrogenetic difference with nepheline gabbros.
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| 5. | The orientation of the layers of gabbro in Skarstind is uncommon.
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| 6. | Examples of phaneritic igneous rocks are gabbro, diorite and granite.
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| 7. | Another occurrence is as cumulate in gabbro and norite layered intrusions.
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| 8. | Gabbro is also found as plutons associated with continental volcanism.
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| 9. | There is very little coarser-grained gabbro and diabase.
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| 10. | There are also incidences of gabbro and diorite, less commonly eclogite.
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