1 / 16

The Earth’s Past

The Earth’s Past. Dampios Menil Sabal Yu. Petrology. the study of rocks studies the composition and distribution as well as the structure of rocks. Geology on the other hand is a broad field that deals with the physical structure of the earth.

juan
Download Presentation

The Earth’s Past

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 Earth’s Past Dampios Menil Sabal Yu

  2. Petrology • the study of rocks • studies the composition and distribution as well as the structure of rocks. Geology on the other hand is a broad field that deals with the physical structure of the earth.

  3. The rocks you see around you - the mountains, canyons & riverbeds, are all made of minerals.  A rock is made up of 2 or more minerals.  You need minerals to make rocks, but you don't need rocks to make minerals. All rocks are made of minerals.

  4. THE ROCK CYCLE Rocks are constantly being formed, worn down and then formed again. This is known as the Rock Cycle. It is like the water cycle but it takes a lot longer. It takes thousands and millions of years for rocks to change.  Rocks are divided into 3 Types. They are classified by how they were formed: • IGNEOUS • SEDIMENTARY • METAMORPHIC

  5. ROCKS FROM OLDESTTO YOUNGEST

  6. D – oldest – at the bottom – superposition law A – next to bottom – superposition law B Tilt – plate tectonics – Law of Horizontality E – intrusion – cross-cutting law Erosion – not horizontal/straight line - Law of Horizontality C – intrusion – Law of cross-cutting Erosion – Horizontality DABEC (old to young) E and C are igneous (magma rising) A, B, D are sedimentary (layers)

  7. There are thousands upon thousands of layers in the earth's crust. However, scientists have grouped the layers into major groups. The most recent three layers are the Paleozoic, Mesozoic, and Cenozoic. These layers represent the last 500 million years of life on earth. 

  8. Events in Rocks • Surprise White Rock on MarsJanuary 23, 2014 | NASAWhile preparing to start robotic arm work on the target “Cape Elizabeth” on Sol 3541 (Jan. 8, 2014), Opportunity encountered a slight surprise — a rock had appeared in the images that had not been there before. This target that has been named “Pinnacle Island” and its origin has been the target of much speculation.

  9. Grand Canyon.  Rocks as old as 2 billion years.  Canyon formation took 1.2 million years.  Only a slow, steady rush of water could carve this meandering trench but leave the rest of the sediment surrounding it intact.

More Related