| 31. | The rock is a geologically significant outcropping of Baraboo Quartzite.
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| 32. | Later Indians continued to quarry the quartzite at Silver Mound.
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| 33. | The Sioux Quartzite is a red to pink Proterozoic quartzite.
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| 34. | The Sioux Quartzite is a red to pink Proterozoic quartzite.
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| 35. | Like granite, quartzite is durable with a similar texture and workability.
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| 36. | Geologically is composed by quartzites and gneiss, especially on the peak.
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| 37. | Quartz and quartzite predominate the earliest unit with few occurrences of silcrete.
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| 38. | Dikes intrude the Hakatai Shale, Shinumo Quartzite, and Dox Formation.
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| 39. | It was built with Sioux Quartzite from a local quarry.
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| 40. | Austertana has the world's second largest quartzite quarry.
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