GY 112L: Earth History Lab
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Transcript of GY 112L: Earth History Lab
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GY 112L: Earth History Lab
Week 9: Paleozoic Part 3
Instructor: Dr. Douglas W. Haywick
UNIVERSITY OF SOUTH ALABAMA
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Today’s Agenda
The Paleozoic Part 3 (Week 9 exercises)
1) Brachiopods 2) Molluscs 3) Alabama Stratigraphy
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Brachiopoda
Brachiopod Facts:
Taxonomy: (under review) Phylum: Brachiopoda Class: Inarticulata Class: Articulata
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Brachiopoda
Brachiopod Facts:
Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata Range: Cambrian-Recent (Inarticulates were first)
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Brachiopoda
Brachiopod Facts:
Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata Range: Cambrian-Recent Mode of Life: Marine, benthic, filter feeder
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Brachiopoda
Brachiopod Facts:
Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata Range: Cambrian-Recent Mode of Life: Marine, benthic, filter feeder Mineral composition: calcite, phosphate
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Brachiopoda
Brachiopod Facts:
Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata Range: Cambrian-Recent Mode of Life: Marine, benthic, filter feeder Mineral composition: calcite, phosphate Fossil Pres.: pristine (sometimes external molds)
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The Brachiopod Animal
Inarticulates
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The Brachiopod Animal
Inarticulates
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Brachiopod Symmetry
Symmetrical across the valves (down the medial line)
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Brachiopod Symmetry
Symmetrical across the valves (down the medial line)
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Brachiopod Symmetry
Symmetrical across the valves (down the medial line)
Articulate Brachiopods
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Brachiopod Symmetry
Symmetrical across the valves (down the medial line)
Articulate Brachiopods
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Brachiopod Symmetry
Not symmetrical between the valves
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Brachiopod Symmetry
Not symmetrical between the valves
Yes No
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Mollusca (Mollusks)
Mollusk Facts:
Taxonomy: Phylum: Mollusca
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Mollusca (Mollusks)
Mollusk Facts:
Taxonomy: Phylum: Mollusca Class: Amphineura Bivalvia Gastropoda Cephalopoda Order: Nautiloidea Ammonoidea Belemnoidea
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Mollusca (Mollusks)
Mollusk Facts:
Taxonomy: Phylum: Mollusca Class: Amphineura Bivalvia Gastropoda Cephalopoda Order: Nautiloidea Ammonoidea Belemnoidea Range: Gastropoda (Cambrian-Recent) Bivalvia (Cambrian-Recent) Cephalopoda (Cambrian-Recent)
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Mollusca (Mollusks)
Mollusk Facts:
Taxonomy: Phylum: Mollusca Class: Bivalvia Gastropoda Range: Gastropoda (Cambrian-Recent) Bivalvia (Cambrian-Recent) Mode of Life: Marine, non-marine, terrestrial, filter feeder, scavenger, predators
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Mollusca (Mollusks)
Mollusk Facts:
Taxonomy: Phylum: Mollusca Class: Bivalvia Gastropoda Range: Gastropoda (Cambrian-Recent) Bivalvia (Cambrian-Recent) Mode of Life: Marine, non-marine, terrestrial, filter feeder, scavenger, predators
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Mollusca (Mollusks)
Mollusk Facts:
Taxonomy: Phylum: Mollusca Class: Bivalvia Gastropoda Range: Gastropoda (Cambrian-Recent) Bivalvia (Cambrian-Recent) Mode of Life: Marine, non-marine, terrestrial, filter feeder, scavenger, predators Mineral composition: calcite, aragonite
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Mollusca (Mollusks)
Mollusk Facts:
Taxonomy: Phylum: Mollusca Class: Bivalvia Gastropoda Range: Gastropoda (Cambrian-Recent) Bivalvia (Cambrian-Recent) Mode of Life: Marine, non-marine, terrestrial, filter feeder, scavenger, predators Mineral composition: calcite, aragonite Fossil Pres.: pristine. molds, casts, chalky
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The Mollusk Animal
Bivalves
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The Mollusk Animal
Gastropods
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Bivalve Symmetry
Symmetrical between the valves
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Bivalve Symmetry
Symmetrical between the valves Not across the valves
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Bivalve vs Brachiopod Symmetry
Bivalve: Symmetrical between the valves
Brachiopod: Symmetrical across the valves
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Bivalve Symmetry
Beware Scallops and Oysters
scallops look symmetrical across the valve but they are not
oysters are not symmetrical at all
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Alabama Stratigraphy and Rock Suites
Collections of Paleozoic rocks from our fair state
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Alabama Stratigraphy and Rock Suites
Paleozoic rocks
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Alabama Stratigraphy and Rock Suites
Paleozoic rocks
Bonus Question: Color Paleozoic rock outcrop areas
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Alabama Stratigraphy and Rock Suites
Rocks this week: a collection of specimens from northern Alabama (including Red Mountain) which is hematite (iron ore).
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Lab Time
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GY 112L: Earth History Lab
Week 9: Paleozoic Part 3
Instructor: Dr. Doug Haywick [email protected]
This is a free open access lecture, but not for commercial purposes. For personal use only.