GY 112L: Earth History Lab

Lab Preamble: Week 7: Paleozoic Part 1

Instructor: Dr. Douglas W. Haywick

UNIVERSITY OF SOUTH ALABAMA

Today’s Agenda

The Paleozoic Part 1

1) Trilobites 2) Graptolites 3) Rock Suites 4) Lab test 2 (March 8: Next week)

Trilobites

One of Doug’s favorite Beasties. They come in a lot of shapes and sizes…

www.mineraltown.com

Trilobites

One of Doug’s favorite Beasties. They come in a lot of shapes and sizes…

www.mineraltown.com

Tricrepicephalus, Utah http://hazen.ciw.edu/trilobites

Trilobites

And have been favorites of collectors for hundreds of years

http://hazen.ciw.edu/trilobites

Koneprussia, Devonian, Morocco

Trilobites

Basic information about trilobites and beasties in general

Trilobites

Trilobite Facts:

Taxonomy: Phylum: Arthropoda Sub-Phylum: Trilobita

Trilobites

Trilobite Facts:

Taxonomy: Phylum: Arthropoda Sub-Phylum: Trilobita Range: Cambrian-Permian/Triassic (Pre-Cambrian?)

Trilobites

Trilobite Facts:

Taxonomy: Phylum: Arthropoda Sub-Phylum: Trilobita Range: Cambrian-Permian/Triassic (Pre-Cambrian?) Mode of Life: Marine, mostly benthic, scavenger/predator

Trilobites

Trilobite Facts:

Taxonomy: Phylum: Arthropoda Sub-Phylum: Trilobita Range: Cambrian-Permian/Triassic (Pre-Cambrian?) Mode of Life: Marine, mostly benthic, scavenger/predator Mineral composition: calcite, chiton http://www.paleodirect.com/trilobites.htm

Trilobites

Trilobite Facts:

Taxonomy: Phylum: Arthropoda Sub-Phylum: Trilobita Range: Cambrian-Permian/Triassic (Pre-Cambrian?) Mode of Life: Marine, mostly benthic, scavenger/predator Mineral composition: calcite, chiton Fossil Pres.: pristine, molds, mineral replacement

http://tucsonmineral.com/images/trilobites/trilobite_lg_bolivia.jpg

Trilobites

Lab Responsibilities:

1) Look at the fossils, answer questions 2) Draw the fossils 3) Add a scale 4) Label body parts

Head

Tail

Thorax 5 cm

Graptolites

A lesser known beastie… …that also in a lot of shapes

http://media-2.web.britannica.com/eb-media/30/12330-004-905A0178.jpg

Graptolites

A lesser known beastie… …that also in a lot of shapes

http://www.lapworth.bham.ac.uk/images/collections/palaeo/Didymograpt.JPG

Graptolites

Graptolite Facts:

Taxonomy: Phylum: Hemichordata Class: Graptolithinia Order: Graptoloidea (graptoids) Order Dendroidea (dendroids)

Graptolites

Graptolite Facts:

Taxonomy: Phylum: Hemichordata Class: Graptolithinia Order: Graptoloidea (graptoids) Order Dendroidea (dendroids) Range: Cambrian-Permian/Triassic

Graptolites

Graptolite Facts:

Taxonomy: Phylum: Hemichordata Class: Graptolithinia Order: Graptoloidea (graptoids) Order Dendroidea (dendroids) Range: Cambrian-Permian/Triassic Mode of Life: Marine (colonial), pelagic, filter feeders

Graptolites

Graptolite Facts:

Taxonomy: Phylum: Hemichordata Class: Graptolithinia Order: Graptoloidea (graptoids) Order Dendroidea (dendroids) Range: Cambrian-Permian/Triassic Mode of Life: Marine (colonial), pelagic, filter feeders Mineral composition: ?

http://1.bp.blogspot.com/_VA6LePZ6KNY/Rx7SOa2rmeI/

Graptolites

Graptolite Facts:

Taxonomy: Phylum: Hemichordata Class: Graptolithinia Order: Graptoloidea (graptoids) Order Dendroidea (dendroids) Range: Cambrian-Permian/Triassic Mode of Life: Marine (colonial), pelagic, filter feeders Mineral composition: ? Fossil Pres.: impression, carbonization

http://www.lapworth.bham.ac.uk/images/collections/palaeo/Didymograpt.JPG

Rock Suites

Collections of rocks from a specific region that cover a specific time frame

1) Colorado Rock Suite (siliciclastic; beware granite and stratigraphy)

Rock Suites

Collections of rocks from a specific region that cover a specific time frame

1) Colorado Rock Suite (siliciclastic; beware granite and stratigraphy) 2) Western Canada Rock Suite (biochemical; beware dolomite/dolostone, also has petroleum geology significance

Lab test 2 (Prep for March 8)

SEDIMENTARY ROCKS TO BE FAMILIAR WITH FOR THIS EXAM

Quartz arenite lithic sandstone

arkose greywacke

conglomerate breccia

shale (red, black, green) fossiliferous limestone

coquina chalk oolite coal

amber halite

For this exam: no siltstone, no non-fossiliferous

limestone,

1) Sedimentary rock examination

Lab test 2

1) Sedimentary rock examination

2) Modes of fossil preservation

10-12 questions dealing with stations, 3 minutes per station, 3-4 writing question

Lab Time

GY 112L: Earth History

Lab 7: Paleozoic Rocks and Fossils 1

Instructor: Dr. Doug Haywick dhaywick@southalabama.edu

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