| 41. | There is an unconformity where the Karoo rocks of the basin overlie much older rocks.
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| 42. | The granitoid layer below the unconformity turned out to be 3.52 billion years old.
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| 43. | The unconformity is well exposed on the shores of Gairloch, Loch Maree and Loch Torridon.
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| 44. | Generally this occurs in certain carbon-bearing sediments, within an unconformity in sedimentary strata.
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| 45. | The Great Falls themselves formed on a fall line unconformity in the Great Falls Tectonic Zone.
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| 46. | At Thornton Force it crosses a notable unconformity into the underlying, steeply inclined Ordovician greywackes.
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| 47. | These are followed by an unconformity.
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| 48. | The Upper Westphalian shows an important unconformity at its base and is made up of conglomerates.
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| 49. | The surface of this angular unconformity truncates dipping strata comprising the folded and faulted Unkar Group.
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| 50. | This member forms small hills within the Great Unconformity on either side of the Chuar syncline.
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