FULL EPISODE Lesson 16 Invertebrate Fossils - Understanding The Earth

Host; Dr. David Pearson. •Invertebrates definition no backbone •What is a fossil? Any trace of life. •Trace fossils •Make up of fossils •Acid test for calcium carbonate •Using diagrams to illustrate how a fossil is formed •Silicification •Rugose coral, Bryozoa Part 2 Invertebrate Fossils -- 16-Part 2 •Horn coral •Brachiopod shells with external spines •Seasonal growth of coral •Cambrian fauna •Precambrian Ediacara fauna Australia - First fossils formed with many cells •Multi-cell advantages -- experiment to show multi-cell formation •Trilobites •Illustrated Geological time scale showing organisms from the Pre-cambrian •Mollusks •Clam -- filter feeder •Squid, Octopus •Snails -- Gastropods •Deposit feeders •Cephalopods -- ammonites •Bi-valves clams, oysters; filter feeders, hinged shells •Mollusks in the Cambrian time •Deposit feeders; snails gastropods, not many cephalopods •This shows Cambrian ocean floor was dominated deposit feeders •Graptolites floating organisms in Ordovician time •Brachiopod filtering sea water -- Ordovician time •Horn coral •Echinoderm -- Sea urchin -- Sea Star filter feeders, Ordovician •Ancient climates during these periods •Three different Cambrian faunas •Organisms in geological time •Conditions under which organisms had to live •Echinoderm -- Sea urchin -- Sea Star filter feeders •History of the study of fossils •Story of "The Lying Stones; Beringer study of fossils •beringer fossil hoax http://www.museumofhoaxes.com/hoax/Ho...