Plants = conifers, flowering pants and NO grass (ex: John Day Oregon was grassy, green andfull of plant life NOW dry desert with few plants).Mammals (most diverse group being rodents) = most modern groups by the end of the Eocene, to understand where the mammals came from listen to the name, similar to geography.- 1st penguins (giant compared to today. located in the South), 1st (fully) marine whales, modern mammals families, modern reefs (again), birds were largeGroups of mammals: (Laurasiatheria, Euarchontoglires, Afrotheria)- Placental mammals: young are fed by placenta until birth - Marsupials: birthed very young than finish out growth in a pouch (ex: Kangaroo). Not placental mammals.-Monotremes: egg laying mammals. Platypus have venom- Bats: 2nd most diverse group of mammals- Laurasiatheria- Carnivores: Creodont (NOT part of carnivora)- LaurasiatheriaFeliforn- cat-like mammals, Kaniforn- dog-like mammals- Eocene: 1st bats- “Cheshire Bats”aka ghost lineage: no transitional fossils (bat bones are small, so their fossils are hard to find. Also, they lived in forrest areas and bones don't fossilize well in forrests)-Proboscideans: elephant relatives (Afrotheria)- were really big and had crazy evolutionary experimentation with trunks-Rodents: diversify in Eocene into all modern families (Euarchontoglires). Like bats, they are one of the most diverse groups of mammals and are in almost every niche-Ungulates=hoof walkingDigitigrade=walk on digits ex:birds, cats (most common)Plantigrade=walk on the soles of feet ex:humans-Elephants are in between digitgrade and plantigrade. They have a squishy bit between theirfeet and ground.-Plants in Paleocene: no grasses yet.
-Reptiles and Insects- becoming more like modern groups in EoceneFossil Collecting in the FieldIn situ: fossil found in a rocky outcrop that is exposed to the Earth's surface.Float: fossil found not attached to an outcrop, but maybe it is close to one because it somehow became detached from the outcrop. Taxon: Type of species.Field location: Where site of fossils are.Field number - Used to identify who, when, and what while collecting fossils. Full initials (AAA) followed by two-digit month (06) followed by two-digit year (16) followed by two-digit fossil number (01 for the first fossil collected) followed by either NC (not collected), PC (partially collected), or C (collected)Neogene (Miocene/Pliocene/Pleistocene/Holocene/Anthropocene)-Continue global cooling-Plants: rise of grassland ecosystems (which meant more niches).-Sharks (larger than the ones today, but close relatives to sharks now)-First baleen whales (filter feeders)- first fossil found in Oregon-Hominidae split (apes) in late Miocene-Ungulates (hoof walking) either Perissodactyls- odd toed (horses and rhinos) or Artiodactlya-even toed (like pigs and deer)Developed Hypsodanty teeth: really tall so you can grind grass (like in Lab 1)-Birds diversified- (song birds appeared)Pleistocene-Glacial cycling across planet starts-Spread and further evolution of homo sapiens. Holocene-The ice ages end -Dominated by Homo SapiensAnthropocene
-Today, viewed as the period during which human activity has been been the dominant influence on climate and the environmentHuman evolution:
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- Spring '17
- Mary Baxter
- Geology, Extinction event, Cretaceous–Tertiary extinction event, Triassic