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SLE395

QuestionAnswer
Name in order the major fossil periods in order of earliest to oldest (Hint: starting from Proterozoic) Proterozoic, Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous, Tertiary, Quaternary
What were the major developments of the PROTEROZOIC ? -Stromatolites appear (2.5by ago) - Oldest multicellular algae - Oldest soft bodied animals - Stromatolites become rare
What were the major developments of the CAMBRIAN - Tommotian faunas ('shelly animals') (prior the cambrian explosion) - Trilobites - Finished by mass extinction of trilobite and radiation of nautiloids
What is Burgess Shale, what period was it dated to and what's its significance? Preservation of soft-bodied animals, first insight into more complex structures and suggests great biodiversity following the Cambrian explosion.
When did predation evolve? Cambrian
What are the major developments of the ORDOVICIAN period? - Further radiation of marine animals (inc. gastropods, ostracods, molluscs etc.)
What are graptolites? Name major morphological features. Extinct group of planktonic, colonial animals. Preserved in black shale. - Theca ('cups) - Stipe ('stem')
What are rugose corals and bryozoans? Rugose: exclusively paleozoic group of solitary colonial corals Bryozoan: colonial, marine and are found in zooids of the colony which secrete tubes of calcite. THESE ARE EARLY CORAL REEF FORMING CREATURES.
What are the major developments of the SILURIAN? - Early land plants
What are the major developments of the DEVONIAN? - First ammonoids - Radiation of jawed fishes - First amphibians - First large trees & beginnings of forest
What are the major developments of the CARBONIFEROUS? - Coal swamps - Beginnings of gymnosperms
What are the major developments of the PERMIAN? - Radiation of gymnosperms - Vertebrates - Hot, dry climate towards end
What are the major developments of the TRIASSIC? - Mammals evolve - Dinosaurs start appearing
What are the major developments of the JURASSIC? - Birds evolve from dinosaurs
What are the major developments of the CRETACEOUS? - Marine plankton radiate - Angiosperms (flowering plants) evolve - Mass extinction due to impact winter
What are the major developments of the TERTIARY? - Land mammals radiate - Grasslands become common - Marine mammals start evolving towards the Quaternary
What are the major developments of the QUATERNARY ? - Marine mammals are established - Homonoids (us and our 'cousins) evolve
Created by: 974869485886242