Stories from the fossil record: http://www.ucmp.berkeley.edu/education/explorati

Question

Stories from the fossil record:

http://www.ucmp.berkeley.edu/education/explorations/tours/stories/middle/intro.html

Note the four sections on this page: Paleoecology, past lives, Geologic time and Biodiversity. Click on the links at the bottom of the page (more and next) to continue through the site. Some pages require to click on image or answer question before the link appears to guide you to the next page. After completeing each section, return to this page to start the next section:

Geological time:

1- What is superposition?.....................

2- What is an index fossil?....................

3- What is turritella?...................

4- What is the genus of the plant fossil that has been used to piece together the positions of the continents in the past?..............

5- When and where did Glossoptris live?...............

6- On what supercontinent did Glossoptris live?...............................

Explanation / Answer

1. The law of superposition can tell us which rocks (and fossils) are oldest and which are youngest by their relative positions.

2. A fossil found in specific layers of rock all over the world is called an index fossil. Venecardia planicosta is an index fossil that only lived during the Eocene.

3. Refer this for the image http://www.ucmp.berkeley.edu/education/explorations/tours/stories/middle/G6.html. This image is a fossil called Turritella and are found at the top of Mt. Diablo. Turritella is a marine snail which means that it lives in the ocean.

4. Geologists and palaeontologists used evidence such as the present-day locations of Glossopteris fossils yo piece together the position of the continents in the past. Refer this http://www.ucmp.berkeley.edu/education/explorations/tours/stories/middle/G8.html

5. Fossils of Glossopteris leaves have been found in rocks that were formed 320 to 210 million years ago.

6. During this time, 255 million years ago, Glossopteris was found all over a large supercontinent called Gondwanaland.

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