1 / 15

The Special Qualities of Sedimentary Rocks

Explore the unique characteristics of sedimentary rocks, including their formation through deposition, compaction, and cementation. Learn about different types such as clastic, chemical, and organically formed rocks, and discover fascinating features like ripple marks, mud cracks, and fossils.

ebravo
Télécharger la présentation

The Special Qualities of Sedimentary Rocks

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. Today’s Objective: What Makes Sedimentary Rocks Special? Sedimentary Rocks - are one of the three main rock types

  2. A sedimentary rock can form one of three ways: • by the deposition of the weathered remains of other rocks • by the deposition of the results of biologic activity • by precipitation from solution.

  3. Important Vocab! • Compaction – is a process that squeezes, or compacts, sediments. • Cementation – “glue” - takes place when dissolved minerals are deposited in the tiny spaces among sediments.

  4. Important Vocab! • Weathering - is a process in which rocks are physically and chemically broken down by water, air, and living things. • Erosion - involves weathering and the removal of rock. • Deposition - when an agent of erosion – water, wind, ice, or gravity – lose energy, it drops the sediments.

  5. Please add… • Agents of Erosion: Water, wind, ice/glaciers, and gravity

  6. Classification of Sedimentary Rocks • Can be classified into two main groups according to the way they form.

  7. Inorganic Land Derived • (AKA) Clastic Sedimentary Rock - composed of weathered bits of rocks • And minerals. • These rocks are classified by particle size.

  8. EXAMPLES of Inorganic Land Derived Conglomerate Shale with Plant Fossils Large grain size Small grain size

  9. Chemical Sedimentary Rocks – Forms when dissolved minerals precipitate from water solutions. (water usually evaporates or boils) Ex: Limestone & rock salt. Salt Flat

  10. Organically Formed Sedimentary Rocks – Forms when shell fragments are cemented together or when plant remains are compacted into rock. • Ex: Fossiliferious Limestone & Bituminous Coal

  11. Features only found in Sedimentary Rocks 1.The Law of Superpositioning - In undisturbed rocks, the oldest layers are found on the bottom and the youngest at the top.

  12. Please add… • Lithification: Physical and chemical processes that transform sediments into sedimentary rocks (compaction + cementation)

  13. 2. Ripple Marks– rock formed along the beach or stream bed. 3. Mud Cracks- formed when wet mud or clay dried and shrank, leaving a rock record of a dry environment. 4.Fossils – traces of remains of ancient life. Trilobite

  14. Where is the oldest layer located on this picture?

More Related