| 41. | The deposits, which are the upper and lower boundary shale.
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| 42. | Black and gray shales of the Precambrian era underlie the town.
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| 43. | Trace fossils are associated with many Burgess Shale-type deposits.
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| 44. | They contain xenoliths of the andesite and shale found in Jersey.
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| 45. | In 1919, the company became a oil-shale industries.
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| 46. | Since 1965, oil shale usage in Fushun started to decline.
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| 47. | The spent shale is removed from the top of the retort.
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| 48. | Alamere Falls tumble over fragile shale cliffs at Alamere Creek Beach.
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| 49. | It is dangerous to climb because the shale is very crumbly.
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| 50. | China launched a national shale gas research centre in August 2010.
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