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