GY 112L: Earth History Lab

Mesozoic Part 2

Instructor: Dr. Douglas W. Haywick

UNIVERSITY OF SOUTH ALABAMA

Today’s Agenda

The Mesozoic Part 2

1) Mollusks (Cephalopods) 2) Echinoderms 3) Alabama Stratigraphy (surface rocks)

Mollusca (Mollusks)

Mollusk Facts:

Taxonomy: Phylum: Mollusca Class: Amphineura Bivalvia Gastropoda Cephalopoda Order: Nautiloidea Ammonoidea Belemnoidea

Mollusca (Mollusks)

Mollusk Facts:

Taxonomy: Phylum: Mollusca Class: Cephalopoda Order: Nautiloidea Ammonoidea Belemnoidea

http://www.aquariumofpacific.org/images/olc/nautilusj.baecker_berlin_zoo_aquarium_pd600.jpg

Mollusca (Mollusks)

Mollusk Facts:

Taxonomy: Phylum: Mollusca Class: Cephalopoda Order: Nautiloidea Ammonoidea Belemnoidea Range: Nautiloidea (Cambrian-Recent) Ammonoidea (D-K/T) Belemnoidea (M-T)

Mollusca (Mollusks)

Mollusk Facts:

Taxonomy: Phylum: Mollusca Class: Cephalopoda Range: Nautiloidea (Cambrian-Recent) Ammonoidea (D-K/T) Belemnoidea (M-T) Mode of Life: Marine, pelagic, predators

Mollusca (Mollusks)

Mollusk Facts:

Taxonomy: Phylum: Mollusca Class: Cephalopoda Range: Nautiloidea (Cambrian-Recent) Ammonoidea (D-K/T) Belemnoidea (M-T) Mode of Life: Marine, predators Mineral composition: aragonite

www.rubybluejewelry.com

Mollusca (Mollusks)

Mollusk Facts:

Taxonomy: Phylum: Mollusca Class: Cephalopoda Range: Nautiloidea (Cambrian-Recent) Ammonoidea (D-K/T) Belemnoidea (M-T) Mode of Life: Marine, predators Mineral composition: aragonite Fossil Pres.: pristine. molds, casts, chalky

http://www.geofossiles.com/image_4667.jpg

The Mollusk Animal

Nautiloids/Ammonites

http://www.tonmo.com/images/content/ammonite-fig7.jpg

The Mollusk Animal

Belemnites

http://www.ucmp.berkeley.edu/images/taxa/inverts/belemnite_anatomy.gif

Cephalopod Symmetry

Cephalopod Symmetry

http://higheredbcs.wiley.com/legacy/college/levin/0471697435/chap_tut/images/nw0258ann.jpg

Cephalopod Symmetry

Echinoderms

Echinoderm Facts:

Taxonomy: Phylum: Echinodermata

Echinoderms

Echinoderm Facts:

Taxonomy: Phylum: Echinodermata Class: Crinoidea Cystoidea Blastoidea Echinodea Asteroidea

Echinoderms

Echinoderm Facts:

Taxonomy: Phylum: Echinodermata Class: Crinoidea Cystoidea Blastoidea Echinodea Asteroidea Range: NeoProterozoic-Recent

http://www.ucmp.berkeley.edu/echinodermata/crinoid6.gif

Echinoderms

Echinoderm Facts:

Taxonomy: Phylum: Echinodermata Class: Crinoidea Cystoidea Blastoidea Echinodea Asteroidea Range: NeoProterozoic-Recent Mode of Life: Marine, benthic, scavengers, filter feeders, predators

http://www.oceanben.com/expeditions/hi0701/Crinoid.jpg

Echinoderms

Echinoderm Facts:

Taxonomy: Phylum: Echinodermata Class: Crinoidea Cystoidea Blastoidea Echinodea Asteroidea Range: NeoProterozoic-Recent Mode of Life: Marine, scavengers, filter feeders, predators Mineral composition: calcite

Echinoderms

Echinoderm Facts:

Taxonomy: Phylum: Echinodermata Class: Crinoidea Cystoidea Blastoidea Echinodea Asteroidea Range: NeoProterozoic-Recent Mode of Life: Marine, scavengers, filter feeders, predators Mineral composition: calcite Fossil Pres.: pristine +/-Chalky

The Echinoderm Animals

Crinoids

http://palaeo.gly.bris.ac.uk/Palaeofiles/Fossilgroups/Crinoidea/crinoidreal.jpg

The Echinoderm Animals

Blastoids

http://www.indiana.edu/~librcsd/etext/hoosier/image/pa-10.jpg

The Echinoderm Animals

Sea Stars

http://www.sms.si.edu/irlfieldguide/SeastarBiol.htm

http://grhughes.hughesmordt.com/Artwork/thumbs/CrownThorns.jpg

The Echinoderm Animals

Sand dollars/Sea Biscuits

http://www.geo.lsa.umich.edu/~kacey/ugrad/3-pht--echB.GIF

Alabama Stratigraphy and Rock Suites

Collections of Mesozoic surface rocks from our fair state

Alabama Stratigraphy and Rocks

Mesozoic surface rocks (Cretaceous)

Mesozoic Sedimentation

Cretaceous •Southern rifting in the Atlantic Ocean

•Gulf of Mexico stops opening

Mesozoic Sedimentation

Cretaceous •Southern rifting in the Atlantic Ocean

•Gulf of Mexico stops opening

•AL Coastal Plain sedimentation

Mesozoic Sedimentation

North South

Only key formations are labeled (those discussed in GY 112)

Lab Time

GY 112L: Earth History

Lab 11: Mesozoic Part 2

Instructor: Dr. Doug Haywick dhaywick@southalabama.edu

This is a free open access lecture, but not for commercial purposes. For personal use only.