| 21. | Formed of striped gneiss, they are crisscrossed by an abundance of little diabase channels.
|
| 22. | These created cracks which were later filled in with additional quantities of magma and diabase.
|
| 23. | It may grow on amphibolite or diabase.
|
| 24. | Devil Mountain is underlain by Nipissing diabase.
|
| 25. | Typically this occurred where the olivine diabase unit dipped at right angles into a shallow drainage.
|
| 26. | The iron content of the diabase is often identified as the source of the ringing ability.
|
| 27. | Trap rock, i . e . basalt or diabase, has a variety of uses.
|
| 28. | They are made from marble, a much softer stone and easier to process than diabase.
|
| 29. | Like the other highest peaks of this area, Mount Ferguson is underlain by Nipissing diabase.
|
| 30. | This geological process created large, thin, subvertical sheets of impermeable basalt, or diabase dikes.
|
