GEOL 107 Lecture Notes - Lecture 11: Apex Predator, Light Tube, Collagen
6 Oct 2018
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Appearance of essentially all coelomic phyla (including our own) in 20-25 million years or less. Small shelly fossils (several phyla: some shells were dwelling tubes and shells (e. g. clam and snail shells, molluscs, most were sclerites (spines that armoured the body; wiwaxia, cowen, 2013, fig. 5. 13: cone things: not shells, but they are similar to quills on a porcipine, the reason why most, small shelly fossils were the dominant skeletons in the early cambrian, rare thereafter. 5. 14) and anomalocaris (virtual lab image 25; cowen, 2013, fig. Three main innovations: complex patterns of deposit-feeding and predation, vertical dwelling burrows, systematic meandering burrows trace fossils define the position of the ediacaran-cambrian boundary, burgess shale - cambrian underwater escarpment. Middle cambrian (505 ma) shale near field, b. c. exceptional preservation of hard and soft-bodied marine animals: one of the most important fossil lagerst tten of all time, predators including opabinia (cowen, 2013, fig.
