GSC 102 Final: Exam 3 Review Sheet

• School: University of Miami
• Department: Geological Sciences
• Course: GSC 102
• Professor: ta-shanataylor

Document Summary

Gsc102: exam #3 review sheet: ordovician mass extinction event, devonian mass extinction event, permian mass extinction event, triassic mass extinction event, cretaceous mass extinction event. 70% of the exam (all the multiple choice) will be based on the questions from student presentations. But each group lost important members: widespread families of trilobites disappeared and graptolites came close to total extinction. From slide: 85% of life went extinct, the main survivors lived in deep ocean water, species died but families survived. *the glacial caused sea levels to drop, which may have added to the mass extinction event since most life was in the ocean. g: devonian mass extinction event: The massive increase in land plant size rapidly increases rock weathering. Increased weathering allows (cid:498)fertilizer runoff(cid:499) which causes anoxia. Increased weathering also removes co2 from the atmosphere, which may have triggered an ice age which contributed to the extinction.