1 / 10

The Fossil Record

The Fossil Record. Chapter 8.3. The Fossil Record. Paleontology = study of fossils Fossils are the remains of an organism that lived a long time ago. Fossilization. Fossils most often preserved in sedimentary rock.

preston-hays
Télécharger la présentation

The Fossil Record

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. The Fossil Record Chapter 8.3

  2. The Fossil Record • Paleontology = study of fossils • Fossils are the remains of an organism that lived a long time ago.

  3. Fossilization • Fossils most often preserved in sedimentary rock. • Sediments cover the fossils. This slows/stop the process of decay (by bacteria) and prevents dead organisms from being eaten. • Normally only hard parts of organisms become fossils • Ex. Bones, shells, teeth, and wood

  4. How Fossils Form • Mummification • Found in dry places

  5. Amber • Hardened tree sap (amber) traps insects, preserving it when it hardens

  6. Tar Seeps • Occurs when petroleum comes to the surface of the Earth • Organisms get stuck in the sticky tar

  7. Freezing • Low temperatures protect and preserve organisms in ice and frozen soil – no bacteria

  8. Petrification • Mineral solutions (ex. Silica, calcite, and pyrite) replace the organic material, creating a mineral replica of the original organism

  9. Types of Fossils • Imprints – ex. of leaves stems, flowers, and fish • Molds and Casts – either an empty cavity or a replica • Coprolites – fossilized dung/waste material • Gastroliths – stones in dinosaur digestive systems • Trace Fossils – ex. Tracks, footprints, borings, and burrows

More Related