The Early Paleozoic Fauna: The significance of the

The Early Paleozoic Fauna: The significance of the Burgess Shale EPSC233 Earth & Life History (Fall 2002) Recommended reading: STANLEY Earth System History Chapter 13, pp. 345-354. Keywords:phyla (arthropods,

brachiopods, echinoderms, mollusks), reef formers (archeocyathids), deposit feeders (trilobites, mollusks), filter feeder (eocrinoids, crinoids, brachiopods, mollusks), predators Wednesday October 2nd (next week) - Next Wednesday afternoon, at 1h30, the Sedimentary Geology class will be taking a field trip to see the limestone exposures at the Laval

Nature Centre (St Vincent de Paul Quarry). - There will be a few extra seats in the vans. If you are interested in joining them, contact Mairi Best at [email protected] - This outing lasts the entire afternoon. If 6 students (or more) wish to go, we will cancel the lecture and I will accompany you. In Namibia and Siberia, the

PrecambrianCambrian boundary can be dated isotopically. Many other localities lie below or above the boundary or have big gaps in

Where igneous rocks are not available, chemostratigraphy is being used as a correlation tool.

This section is from Chemostratigraphy Comparing Death Valley (AZ, U.S.) and Mackenzie Mountains (Canada) Is this a reliable correlation tool? Are there gaps in the

Drift of continents during the Cambrian: 600, 540 and 525 million years ago. A proto-Atlantic called Iapetus is created along east

coast of N. America. Cambrian trilobites, lacking claws or specialized mouth parts for chewing, were probably not predators There were larger animals around. Scattered remains of a diverse Cambrian soft-bodied fauna

were found first in the Rocky Mountains of B.C., in the Most Cambrian sandstones are poor in fossils. As sea level rose worldwide, continental shelves were flooded. Vast areas on the continental margins became hospitable to shelly marine faunas.

Cambrian sandstones grade upward to shallowwater limestones. These limestones rarely contain stromatolites, unlike Precambrian limestones. They contain the remains of a diverse shallow-water community of animals and algae. Named UNESCO World Heritage

Site in 1981. 505 Ma. View of the Walcott Quarry, in the Burgess Shale. Walcott, from the Smithsonian Institute started quarrying here in 1909. He sent about 65,000 specimens

to the Smithsonian. Mud accumulated (and became shale) atthe edge of a CaCO3 platform (algal reef). Tuzoia TuzoiaAnomalocaris hybrid Some of the middle Cambrian fossils were

so different from anything known today that the first reconstructions mistakenly included parts from different animals... If Tuzoia is a bivalved shrimp: is this its Paleontologists were groping in the dark until complete specimens were found in the Early Cambrian strata from Chengjiang, China. - soft bodied fauna, like the Burgess Shale

- but 30 million years older - evidence of predation and burrowing - most phyla surviving today are represented - but complex fossils of uncertain affinities are also present Some re-assembly was required...

jaws interpreted as jellyfish claws = Anomalocaris Up to 2 meters long The Burgess Shale fauna is not unique, other exceptional

fossiliferous deposits of Cambrian age have been found (Emu Bay, Australia; Chengjiang, South China, Orsten, Sweden). All confirm: - the predominance and diversity of arthropods - the existence of body plans that seem to have disappeared - some include earliest chordates

The finding of the Chengjiang fauna, 30 million years older (535 Ma), confirm the diversity of the early Cambrian fauna.

Burgess Shale fauna is a diverse assemblage of soft-bodied organisms. Some display body plans that have no counterparts to this day. Opabinia: five eyes, a clasping limb

Recently Viewed Presentations

  • Management of the Uganda AIDS Commission ABC Approach to AIDS ...

    Management of the Uganda AIDS Commission ABC Approach to AIDS ...

    The ABC Approach to AIDS Prevention ... of illiteracy Unifying Symbolism Advocated by populist leader Creates a sense of shared mission Managing "Up" Talking to Partners Internal and External Groups: USAID, WHO, UNAIDS, Save the Children, etc ABC and Managing...
  • Byzantine Empire & The Crusades

    Byzantine Empire & The Crusades

    Pope Benedict presents a book at the Greek Orthodox Patriarchate, 15 May 2009. Crusades. Byzantine Emperor calls on the Pope for help defending Muslims from the Holy Lands (Jerusalem). Pope Urban II encourages Christians & knights to fight in a...
  • TDSB Secondary Program Delivery Model

    TDSB Secondary Program Delivery Model

    * Important Additional Considerations Students in ESL classes may receive a deferral from the Ontario Secondary School Literacy Test (OSSLT) Students in ESL classes can be given extra time and other accommodations on tests, assignments and exams in other subject...
  • Luyn kim bt - khi nim c bn

    Luyn kim bt - khi nim c bn

    Mechanical vibration facilitates the formation of nearly closed packed powder by settling particles in the voids present in the powder agglomerate. During vibration, small pneumatic pressure is usually superimposed on the powder mass. - Brittle powders can be compacted by...
  • "Food Chains with a Scavenger" Penn State Behrend

    "Food Chains with a Scavenger" Penn State Behrend

    Rutter's slide Other possibilities for further research 3 species models w/ scavenger Scavengers affect other species (crowding) Scavenger Ring models More quadratic death terms Etc. etc. etc. Ben Nolting (Alaska) Scavengers: Animals that subsist primarily on carrion (the bodies of...
  • PowerPoint Presentation

    PowerPoint Presentation

    Types of Figurative Language Simile Metaphor Personification Alliteration Onomatopoeia Hyperbole Idioms Simile Compares two things using the words "like" or "as" Busy as a bee Clean as a whistle Brave as a lion Stand out like a sore thumb As...
  • PowerPoint Presentation

    PowerPoint Presentation

    Cost. Class Cost - 3 credit hours. Trip Cost . $2,500 . 200* deposit due with application = $2,300 Due in 4 payments of $575 Jan, Feb, Mar,Apr. $700 worth of grant money available to apply towards the cost of...
  • Needle Exchange Seminar Tuesday 4th June 2019 Geraldine

    Needle Exchange Seminar Tuesday 4th June 2019 Geraldine

    Geraldine Duggan Belfast City Centre Management . Agenda. Welcome & Introduction- ... Zoe Campbell (Outreach Worker) 07546512965 / 02895 041063. Wilma Kennedy (Team Secretary) 02895 046771. TEAM EMAIL FOR REFERRALS. Alana. [email protected]