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Th And Th Stone Crusher For Medium Hard Rock From Tanzania

Dec 17, 2020 The entire footprint trail is almost 27 m (88 ft) long and includes impressions of about 70 early human footprints. 3.6 million years ago in Laetoli, Tanzania, three early humans walked through wet volcanic ash. When the nearby volcano erupted again, subsequent layers of ash covered and preserved the oldest known footprints of early humans

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