http://www.ucmp.berkeley.edu/exhibit/histgeoscale.php 1- Explain the contribute
ID: 299280 • Letter: H
Question
http://www.ucmp.berkeley.edu/exhibit/histgeoscale.php
1- Explain the contribute of Nicholaus Steno to geology?...............
2- What were two of William Smith contributions to geology? ( what did he produce, and what was the pricniple for which he is responsible)?
3- The beginning of the Phanerozoic is marked by what occurence? ( read the whole paragraph carefully)?....................
4- What are the three divisions (Era) of the Phanerozoic Eon?.................
5- What do the following terms mean:
Zoic...............
Cen...................
Meso.................
Paleo..................
6- What major group of animals dominated the Mesozoic Era?....................
Explanation / Answer
1. Nicholas Steno's most famous contribution to geology is his Law of Superposition which states that in an undisturbed sequence of strata the older layers are usually deposited first and are found at the bottom of the sequence while the younger layers are deposited at the top above the older layers. His another famous principle was the principle of horizontallity which stated that sedimentary rocks are laid down in a horizontal manner.
2. Two of William Smith's most important contributions to geology were that he produced a geologic map of England in which he successfully demonstrated the principle of faunal succession and its validity. The principle of faunal succession states that fossils are found in rocks in a very definite order.
3.The beginning of Phanerozoic is marked by the beginning of life. It coincides with the appearance of animals that evolved exoskeletons.
4. The three divisions of the Phanerozoic Eon are:
5. Zoic means animal.
Cen means recent.
Meso means middle.
Paleo means ancient.
6. The major group of animals that dominated the Mesozoic Era were the Dinosaurs. Hence, the Mesozoic Era is known as the "Age of Dinosaurs".
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