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400 MILLION, BC: a 45 minute field trip to a Silurian sea floor

400 MILLION, BC: a 45 minute field trip to a Silurian sea floor. You are. . . . running a high-end paleo-tourism business, and you need a hot new beach destination for the next vacation season You need to figure out if this place is the next Padre Island, or a lawsuit waiting to happen.

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400 MILLION, BC: a 45 minute field trip to a Silurian sea floor

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  1. 400 MILLION, BC: a 45 minute field trip to a Silurian sea floor

  2. You are . . . • . . . running a high-end paleo-tourism business, and you need a hot new beach destination for the next vacation season • You need to figure out if this place is the next Padre Island, or a lawsuit waiting to happen . . .

  3. Before you is . . . • . . . . a piece of a Silurian sea floor from Anticosti Island, Canada Your task is . . . • . . . figure out what the environment it is from . . . And whether or not your time-travel beach vacation will be a . . .

  4. Scenic Dangerous Lame

  5. Coral • A member of the Cnidaria • Individual polys feeding with tenticles • Live either solitarily (horn corals) or colonially (reefs) • Make skeletons out of calcium carbonate

  6. Crinoids • A member of the Echinodermata • Attached to the seafloor, with a stalk and arms that filter-feed • Skeleton made of calcium carbonate, often breaks down into the constituent ‘bits’ • Also called sea lilies

  7. Brachiopods • A member of the Brachiopoda • Look like a mollusc, but have a plane of symmetry THROUGH the shells, not between them • Shell made of calcium carbonate

  8. Trilobites • A member of the Arthropoda • Exoskeleton of calcium carbonate • Made up of a head, tail and segments • Had a set of legs on each segment, but the legs are very rarely preserved

  9. Bryozoans • Tiny colonial critters • Live in branch-like or twig-like colonies • Skelton of calcium carbonate • Holes on the ‘twigs’ typically >1mm across

  10. Gastropods (Snails) • Member of the Mollusca • Curly shells of calcium carbonate, housing a soft-bodied critter

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