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UNIVERSITY OF SOUTH

GY 112L: History Lab

Week 9: Part 3

Instructor: Dr. Douglas W. Haywick Today’s Agenda

The Paleozoic Part 3 (Week 9 exercises)

1) 2) Molluscs 3) Alabama Stratigraphy Brachiopoda

Brachiopod Facts:

Taxonomy: (under review) : Brachiopoda : Inarticulata Class:

Brachiopoda

Brachiopod Facts:

Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata

Range: -Recent (Inarticulates were first)

Brachiopoda

Brachiopod Facts:

Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata

Range: Cambrian-Recent

Mode of : Marine, benthic,

Brachiopoda

Brachiopod Facts:

Taxonomy: Phylum: Brachiopoda Class: Inarticulata Class: Articulata

Range: Cambrian-Recent

Mode of Life: Marine, benthic, filter feeder

Mineral composition: , 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

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 (Mollusks)

Mollusk Facts:

Taxonomy: Phylum: Mollusca

Mollusca (Mollusks)

Mollusk Facts:

Taxonomy: Phylum: Mollusca Class: Amphineura Cephalopoda : Nautiloidea

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,

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

Beware and

scallops look symmetrical across the 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.