1 / 14

Fossils Chapter 21.4

Fossils Chapter 21.4. fossil : remains or evidence of living things. (1) original remains : the actual, unchanged remains of the organism are preserved. (a) frozen in ice. (b) preserved in amber(tree sap that has hardened. (c) mummification.

melva
Download Presentation

Fossils Chapter 21.4

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fossils Chapter 21.4

  2. fossil:remains or evidence of living things

  3. (1) original remains: the actual, unchanged remains of the organism are preserved

  4. (a) frozen in ice

  5. (b) preserved in amber(tree sap that has hardened

  6. (c) mummification

  7. (2) replaced remains: soft parts of the organism have disappeared and been replaced by minerals

  8. petrification

  9. (3) molds and casts of the original organism (4) trace fossils: evidence of life other than remains of an organisms activities and/or appearance

  10. (a) footprints (c) tracks, trails, burrows, borings (b) imprint

  11. coprolites: fossilized dung or waste materials from ancient animals T-Rex Carnivore Coprolite (8 lbs.)

  12. gastroliths: fossilized stone found within the digestive system of a dinosaur or other reptile

  13. index fossil: fossils found exclusively in rock record of a particular geologic age • must have (4) characteristics: • (1) must be easily recognizable • (2) must be widespread in occurrence • (3) must be limited in time • (4) must be found in large numbers with the rock layer

More Related