gy 112l: earth history lab
TRANSCRIPT
GY 112L: Earth History Lab
Week 9: Paleozoic Part 3
Instructor: Dr. Douglas W. Haywick
UNIVERSITY OF SOUTH ALABAMA
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 the valves
Brachiopod: Symmetrical across the valves
Bivalve Symmetry
Beware Scallops and Oysters
scallops look symmetrical across the valve but they are not
oysters are not symmetrical at all
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.