Title |
Comment |
Keywords |
Formation of Fossils
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02:04 - 03:02 (00:58) / 1.5 MB
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mold, bone, shell, "sedimentary rock", groundwater, cast, fossil, track, burrow, nest
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Stromatolites
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03:55 - 04:59 (01:04) / 1.4 MB
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fossil, "marine organism", bone, shell, stromatolite, algae, oxygen, atmosphere, evolution, "sedimentary rock"
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Calcium and Phosphorous
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13:48 - 15:09 (01:21) / 2.4 MB
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weathering, "chemical weathering", calcium, phosphorous, element, bone, plant, soil, animal, apatite, granite, phosphate, rock, "food chain", life, vertebrate
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Geology School Keywords
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