DiscoveringDevonianMicrofossils Microfossils-to-GO! Charlie Drewes Ecology, Evolution & Organismal Biology Iowa State University, Ames IA.

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Presentation transcript:

DiscoveringDevonianMicrofossils Microfossils-to-GO! Charlie Drewes Ecology, Evolution & Organismal Biology Iowa State University, Ames IA

What are microfossils?  fossilized remains (plant, animal, protozoan)  derive from hard parts (exoskeleton, endoskeleton, covering, shell, teeth)  less than 1-2 mm in size (> mm)  imbedded in rock or loose particles  research utility (paleoenvironmental reconstruction, biostratigraphy, paleooceanography)  educational use (hands-on, inquiry, discovery)

COURSES & CURRICULA: General & Advanced Biology Geology & Earth Science CONTENT THEMES: Evolution & Biodiversity Paleontology LEVEL: HS or college

   MYA MYA MYA MYA

DEVONIANDEVONIAN “the age of the fishes”

DEVONIANDEVONIAN

DEVONIAN Fossil Deposits in Iowa  Rockford FROM:

x I save

small-sized granules and microfossils ▼ ▼▼ ▼

Microfossils & Accessory Tools p. 3

Microfossil Spoon p. 5

Microfossil Sorting Platform p. 5

Microfossil Widget p. 5

Transferring Microfossils p. 3

█ Foraminifera (multi-chambered shell) █ Charophyte algae (oogonia) █ Sponge (spicules) █ Bryozoa (branching or fenestrated tubes) █ Snail (coiled shell) █ Tentaculite (long, conical shell) █ Polychaete (jaws) █ Ostracod (bivalve carapace) █ Brachiopod (articulating shells) █ Crinoid (articulating, internal ossicles) █ Conodont animal (jaw apparatus) █ miscellaneous spines from unknown origin Microfossil Category Checklist p. 4

FORAMINIFERANS

CHAROPHYTES - oogonia

SPONGE SPICULES

BRYOZOANS living freshwater bryozoan

GASTROPODS - snails

TENTACULITES

annelid jaws SCOLECODONTS

OSTRACODS seed shrimp crustacean living freshwater ostracod

BRACHIOPODS lamp shells

CRINOIDS sea lilies echinoderms

CONODONTSCONODONTS hypothetical conodont animal

unidentified spines, etc

Microfossils-to-GO ! from: Microfossils-to-GO ! A hands-on workshop presented by C. Drewes at 2004 National Association of Biology Teachers Convention, Chicago, IL WORKSHOP & WRITE-UP DESCRIPTION: Emphasis on collecting, cleaning, handling, and visualizing Devonian microfossils. Free samples of microfossils, tools for handling, and CD with macro- and micro-fossil image galleries

TO REQUEST COPY OF STUDENT LAB WRITE-UP ON MICROFOSSILS, please contact C. Drewes at: PHONE: (515) MAIL: Dr. Charlie Drewes, Rm 503 Science II Bldg (EEOB), Iowa State University Ames, IA WEB: