Marine Fossils and Sea Level: Exploring Trilobites and Graptolites

3/1/24, 10:26 AM Case Study 2, Marine Fossils Depict Sea Level History - Introduction, Learning Goals and Case Study Details: EOSC 326 99C 20… https://canvas.ubc.ca/courses/130823/pages/case-study-2-marine-fossils-depict-sea-level-history-introduction-learning-goals-and-case-study-details?… 1/3 Case Study 2, Marine Fossils Depict Sea Level History - Introduction, Learning Goals and Case Study Details Trilobites. Illustration by Heinrich Harder (1858-1935) In Case Study 2, you will be looking at two different groups of marine animals, the trilobites and the graptolites. Both of these groups are principally found in the Paleozoic. You will learn about their biology, evolutionary history, modes of life, distribution in space, etc. You will then use this knowledge to see what these groups can tell you with respect to narrowing down the age of specific Paleozoic rocks. The distribution of these groups can also provide information about Earth's past environment and ancient geography in the areas that contain these fossils. Learning Goals By the end of this Case Study, you should be able to: 1. Describe the basic biology of trilobites; 2. Describe the trilobite exoskeleton and how growth was achieved;

3/1/24, 10:26 AM Case Study 2, Marine Fossils Depict Sea Level History - Introduction, Learning Goals and Case Study Details: EOSC 326 99C 20… https://canvas.ubc.ca/courses/130823/pages/case-study-2-marine-fossils-depict-sea-level-history-introduction-learning-goals-and-case-study-details?… 2/3 3. Compare and contrast the different trilobite eye systems; 4. Discuss some of the unusual eye adaptations found in the trilobites; 5. Describe the main morphological trends present in the trilobites through time; 6. Compare and contrast the trilobites and the agnostids; 7. Describe the basic biology of dendroids and graptoloids; 8. Describe the main morphological trends present in the graptolites through time; 9. Explain how trilobites and graptolites complement one another as relative dating tools. From Lab 4 1. Use morphological characteristics to identify graptolite and trilobite fossils; 2. Use fossil age and position to determine the ages of different rocks in sections; 3. Use rock types to characterize the depositional environment of an area through time. Outline Trilobites (morphology, growth and feeding, trace fossils, morphological trends, classification) Graptolites (morphology, growth and feeding, morphological trends, classification) Trilobites and graptolites as relative dating tools. Application of concepts from sections 1 - 3 in a specific lab scenario (Lab 4). As you move through Case Study 2, you will encounter the resources listed below embedded in the notes pages. You don't need to go anywhere special to access these resources. They will just come up in the appropriate place when you work through the Case Study ahead. Videos and Other Media Optional - Origins of Trilobites. Webpage Link (http://www.trilobites.info/origins.htm) Optional - Trilobite Feeding Habits. Webpage Link (http://www.trilobites.info/feeding.htm) Optional - Trilobite Ecology. Webpage Link (http://www.trilobites.info/triloecology.htm) Required - Unbelievable Hyper Compound Eye. Video Link (https://www.google.com/search? q=Unblieveable+trilobite+hyper+compund+eye&rlz=1C1CHBD_enCA824CA824&oq=Unblieveab le+trilobite+hyper+compund+eye&aqs=chrome..69i57j33i10i160.9308j0j15&sourceid=chrome&i e=UTF-8#fpstate=ive&vld=cid:f6d3c162,vid:pj8EAMH0GXc) Optional - Researchers Built a New Camera Based on Trilobite Eyes. Video Link Required - Animation of trilobite moulting styles. University of Alberta. Website Link (https://ssl.eas.ualberta.ca/trilobites-moulting/story.html) Optional - Fossils Discovered at BC's Burgess Shale Add to Tree of Life. CBC News, 2019. Article Link (https://www.cbc.ca/news/science/agnostid-burgess-shale-fossils-1.4980093) Required - The Trouble With Trilobites. PBS Eons, 2017. Video Link (https://www.youtube.com/watch?v=Aji2VnQFUCs)

3/1/24, 10:26 AM Case Study 2, Marine Fossils Depict Sea Level History - Introduction, Learning Goals and Case Study Details: EOSC 326 99C 20… https://canvas.ubc.ca/courses/130823/pages/case-study-2-marine-fossils-depict-sea-level-history-introduction-learning-goals-and-case-study-details?… 3/3 Optional - Canadian Trilobites and Trilobite Research, University of Alberta. Website Link (https://www.ualberta.ca/earth-sciences/facilities/collections-and-museums/treasury-of- trilobites/draft2.html) Optional - Episode 71: Graptolites - Palaeopodcast. Media Link (http://www.palaeocast.com/episode-71-graptolites/)

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