| 31. | On the north part of the island, there is a concentration of gabbro and diabase sills.
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| 32. | Dikes can vary in texture and their composition can range from diabase or basaltic to metamorphic segregations.
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| 33. | The diabase sill formed at roughly 2-3 kilometers beneath the surface ( Sevon 1999 ).
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| 34. | The hard diabase intrusions were more resistant to the ice and survived as a network of ridges.
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| 35. | This diabase cap is the erosional remnant of a sill that once extended over the entire area.
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| 36. | The more resistant diabase dikes remained, while the softer shales were bulldozed away by the glaciers.
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| 37. | Pigeon Point is the most eastern part of Minnesota; it is a diabase sill about thick.
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| 38. | This includes the Nipissing diabase and Temagami greenstone belt, which hosts a variety of mineral deposits.
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| 39. | The basalt cliffs are the margin of a diabase Period by the intrusion of molten magma upward into sandstone.
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| 40. | This magma cooled into the diabase dykes seen in the cliffs of Western Brook Pond and Ten Mile Pond.
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