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Fossil Remains

Fossil Remains. Chapter 21.4. Video – Fossils of the Ohio Falls (3:09 min). Fossils are preserved remains or evidence of once living organisms. Original Preservation: - Remains of plants or animals preserved relatively unchanged. - Preserved in amber, tar, dehydrated, or quick frozen.

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Fossil Remains

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  1. Fossil Remains Chapter 21.4

  2. Video – Fossils of the Ohio Falls (3:09 min) Fossils are preserved remains or evidence of once living organisms. Original Preservation: - Remains of plants or animals preserved relatively unchanged. - Preserved in amber, tar, dehydrated, or quick frozen. Frozen Remains of Wooly Mammoth http://news.bbc.co.uk/2/hi/science/nature/6284214.stm Viney, M. (2008). The Virtual Petrified Wood Museum, http://petrifiedwoodmuseum.org Video – Soft Tissue Discovery (4:33 min)

  3. Altered Hard Parts: - Hard parts from plants (stems, seeds) or animals (bones, teeth, shells) preserved by mineral replacement or recrystallization. Viney, M. (2008). The Virtual Petrified Wood Museum, http://petrifiedwoodmuseum.org Viney, M. (2008). The Virtual Petrified Wood Museum, http://petrifiedwoodmuseum.org

  4. Casts and Molds: - body of organism leaves an impression in soft material. - body decays leaving an imprint (mold) in the material. - new material is deposited over imprint and fills in void (cast). Viney, M. (2008). The Virtual Petrified Wood Museum, http://petrifiedwoodmuseum.org

  5. Trace Fossils: - Indirect evidence such as animal tracks, footprints, burrows. Index Fossils are common fossils of known age used to date other fossils of unknown age by using their position above or below the known (index) fossil.

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