LabsLab 8 - Exercise - GEOL 1404 Historical Geology Lab...

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GEOL 1404 Historical Geology Lab Please answer the following questions on a separate piece of paper. OVERVIEW 1) Using the geologic ranges given in your lab manual for the different invertebrate groups, summarize which groups are of particular importance during the Mesozoic Era MESOZOIC ERA Phylum Cnidaria 1) Find the geologic ranges for the different orders of Cnidaria. Which groups that dominated the Paleozoic disappear (when?)? Which become more important? Phylum Mollusca Class Bivalvia 1) What explanation may be offered for the observation that heavy-shelled bivalves are mainly nearshore dwellers? 2) Bivalves are filter feeders. What does this mean? 3) Find a bivalve specimen from our collection on which inner shell features, like muscle imprints, can be identified. Draw and label. Class Gastropoda 4) Sketch one of the fossil gastropod (snail) specimens from our collection and label aperture, whorls, and sutures on your drawing. Does your specimen coil in a plane
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LabsLab 8 - Exercise - GEOL 1404 Historical Geology Lab...

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