| 1. | In the north it occurs at Wynyard as the Wynyard Tillite.
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| 2. | Tho oldest tillite in the area is about 4 million years old.
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| 3. | The tillite may have started appearing in the Late Carboniferous.
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| 4. | In the west is the Zeehan Tillite.
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| 5. | The face of the peak exhibits large-scale slump structures in the Metschel Tillite zone.
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| 6. | The lowest levels are a discontinuous dark grey pebbly tillite up to several hundreds of meters thick.
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| 7. | There is a tillite bed near Port Askaig that provides evidence of an ice age in the Precambrian.
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| 8. | The angular, coarse-grained, poor-sorted glacial deposit, called tillite, was deposited.
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| 9. | Tillite deposits, dating from 2950 million years ago, are indicative of the first glaciation episodes on earth.
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| 10. | The name is in association with Portal Rock and also reflects the location at the mouth of Tillite Glacier.
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