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@ Chrome File Edit View History Bookmarks Profiles Tab Window Help ® % £ T Q B & TueNov2s 530PM ©O0 M x @SN x| % (O0H X | wm Cotar X | om Cortar X | m Cottar X | um Cartar X | vm Catar X | @ (455) X | @ mascar x| Mrker x | + c n N [E L R e Tl I T =T Y EN AL R eTo 0= g T (el Ter=1 [€2Yo) (o Xe W RV o) VT N N SR A o P [ E X T=Y Lo VA d [ teXe VA IV AV TN & a & o . Im """'.-i- unch 1 :‘m U rgariisitis PRE-LAB EXERCISES 1. Invertebrate macrofossils are useful for biostratigraphic correlation and determin- ing the ages of sedimentary rocks. In the Geologic Range Table below, indicate the geologic range of each invertebrate group by placing an x in the boxes corre- sponding to the geologic periods in which it lived. When you have completed the chart, you will be able to see which fossil groups coexisted in time, which fossil groups never coexisted, and times at which major extinction events occurred. GEOLOGIC RANGETABLE rFossiI Group Paleozoic Mesozoic Cenozoic S|D|M | J R |N Porifera Rugose corals Tabulate corals Scleractinian corals Bryozoans Brachiopods Bivalves Gastropods Ammonoids Nautiloids Belemnoids Trilobites Eurypterids Barnacles nsect: ‘Isecs Invertebrate Macrofossils and Classification of Organisms Text

T pamela . X % @)SNE X | (B)CHE X | wm Caartt x| wm Cavart X | sm Camartt X | wm Cortartt X | wm Camvart X | @ (4s5)r X | @ nscari x| @ wanew x|+ v 2 Cc n ttps://archive.org/details/Pamelal.W.GoreHistoricalGeologyLabManualWiley2014/page/n273/mode/lup?view=theate l “ 'Fossil Group Paleozoic Mesozoic Cenozoic b | HoNlESHRDA/ AV S| e[S S S R RN QJI Ostracodes x @ Crinoids X Blastoids x Echinoids X Asteroids x ‘Graptolltes o X Key: €= Cambrian, O = Ordovician, S = Silurian, D = Devonian, M = Mississippian, [P = Pennsylvanian, P = Permian, T =Triassic, J = Jurassic, K = Cretaceous, P = Paleogene, N = Neogene, Q = Quaternary. Use the completed Geologic Range table to answer the following questions. 2. Which fossil groups were present during the Paleozoic? All except the asteroids 3. Which fossil groups were present during the Mesozoic? ostacods,crinoids,echonoids,and asteriod 4. Which fossil groups were present during the Cenozoic? ostacods,crinoids and echinoids 5. Major faunal extinctions occurred several times in the geologic past. The boundar- ies between eras were drawn where mass extinction events occurred. The earlier of these two extinctions occurred at the end of the P¢™™'a" Period (not era), __252 million years ago. List five fossil groups that became extinct at this time: trilobites, chrodata, gonatite blastoids and graptolite 6. The second of these two mass extinctions was most dramatic among the vertebrates (dinosaurs and marine reptiles), but it also affected microfossils and invertebrate macrofossils. This other major extinction occurred at the end of the oreataceous Period (not era), 65 million years ago. The following invertebrate macrofossil fossil group(s) became extinct at this time: belemnoids 7. 1f you found a rock that contained both scleractinian corals and ammonoids, to whichigeplggicipesiads {nahesasamighd ik helans Betting possibly gong back to devonian carboniferous, or permian periods depending on the specific charecteristics of the Tossils