| 41. | A thin layer of this alga tends to cover rock surfaces and seaweeds grow as epiphytes on top.
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| 42. | As it crawls across a rock surface, pieces of its base become detached and grow into new individuals.
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| 43. | Tsogt Taiji composed his popular poem in 1621 which was later written on a rock surface in 1624.
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| 44. | As a result, several rocks surfaced which were barely visible and often covered in small pools of water.
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| 45. | The next advancement in the history of communications came with the production of petroglyphs, carvings into a rock surface.
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| 46. | The Mars scientific exploring machine Spirit has observed case hardening present of the rock surface present at Gusev meteorite Crater.
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| 47. | In that regard, Kerridge noted that the rock surface has a fragmented texture suspiciously like that of the so-called fossil.
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| 48. | It is on this crystalline rock surface that the younger, more familiar layered rocks of the Colorado Plateau were deposited.
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| 49. | Generally it is located on rock surfaces rather than under stones, and is often found above neap high water mark.
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| 50. | Inside the Reserve there are at least 420 rock surfaces with rock engraves declared in 1979 World Heritage by UNESCO.
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