UNIVERSITY OF SOUTH ALABAMA
GY 112L: Earth History Lab
Week 9: Paleozoic Part 3
Instructor: Dr. Douglas W. Haywick Today’s Agenda
The Paleozoic Part 3 (Week 9 exercises)
1) Brachiopods 2) Molluscs 3) Alabama Stratigraphy Brachiopoda
Brachiopod Facts:
Taxonomy: (under review) Phylum: Brachiopoda Class: Inarticulata Class: Articulata
Brachiopoda
Brachiopod Facts:
Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata
Range: Cambrian-Recent (Inarticulates were first)
Brachiopoda
Brachiopod Facts:
Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata
Range: Cambrian-Recent
Mode of Life: Marine, benthic, filter feeder
Brachiopoda
Brachiopod Facts:
Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata
Range: Cambrian-Recent
Mode of Life: Marine, benthic, filter feeder
Mineral composition: calcite, phosphate
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)
The Brachiopod Animal
Inarticulates
The Brachiopod Animal
Inarticulates
Brachiopod Symmetry
Symmetrical across the valves (down the medial line)
Brachiopod Symmetry
Symmetrical across the valves (down the medial line)
Brachiopod Symmetry
Symmetrical across the valves (down the medial line)
Articulate Brachiopods Brachiopod Symmetry
Symmetrical across the valves (down the medial line)
Articulate Brachiopods Brachiopod Symmetry
Not symmetrical between the valves
Brachiopod Symmetry
Not symmetrical between the valves
Yes No Mollusca (Mollusks)
Mollusk Facts:
Taxonomy: Phylum: Mollusca
Mollusca (Mollusks)
Mollusk Facts:
Taxonomy: Phylum: Mollusca Class: Amphineura Bivalvia Gastropoda Cephalopoda Order: Nautiloidea Ammonoidea Belemnoidea
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)
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
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
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
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
The Mollusk Animal
Bivalves
The Mollusk Animal
Gastropods
Bivalve Symmetry
Symmetrical between the valves
Bivalve Symmetry
Symmetrical between the valves Not across the valves
Bivalve vs Brachiopod Symmetry
Bivalve: Symmetrical between Brachiopod: Symmetrical the valves across the valves Bivalve Symmetry
scallops look symmetrical across the valve oysters are not symmetrical at all but they are not Alabama Stratigraphy and Rock Suites
Collections of Paleozoic rocks from our fair state
Alabama Stratigraphy and Rock Suites
Paleozoic rocks
Alabama Stratigraphy and Rock Suites
Paleozoic rocks
Bonus Question: Color Paleozoic rock outcrop areas Alabama Stratigraphy and Rock Suites
Rocks this week: a collection of specimens from northern Alabama (including Red Mountain) which is hematite (iron ore). Lab Time 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.