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Ammonites
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Scientific Classification |
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Ammonites are an extinct group of cephalopod molluscs that lived in
marine environments. They first appeared in the Late Silurian
or Early Devonian (about 400 million years ago), and went extinct
at the end of the
Cretaceous period
(about 65 million years ago), during the
Cretaceous-Tertiary mass extinction.
Although they outwardly physically resemble the modern Nautilus, Ammonites
are actually believed to be more closely related to cuttlefish, octopi,
and squid.
Ammonite
fossils are often (but not
always) a distinctive flattened spiral coil with visible ribs, although there
are species with unusual coil shapes, partially coiled shells, and even
uncoiled shells.
Most Ammonites are quite small, perhaps 9 inches (23 centimeters) or less
in diameter - there are however some larger types, for example
Parapuzosia seppenradensis which is found in
Cretaceous
rocks from
Germany
is sometimes upto 6½ feet (2 meters) in diameter,
Fossilized ammonites preserved in rock:
Ammonite fossils have been known
since ancient times:
- The Roman author, Pliny the Elder (23 CE to 79 CE) called the
fossils,
the "horns of Ammon", because he thought that they resembled
the ram's horns which the Egyptian god Ammon was depicted with.
- In medieval times, Ammonites were often thought to be petrified snakes,
and were often called "snake stones" or
"serpent stones". The supposed petrification was usually ascribed to
the actions of saints such as Saint Patrick (who was said to have driven the snakes
out of Ireland).
- In India, Ammonites were sometimes regarded as symbols of the god Vishnu,
and were kept in temples.
Today, modern scientists often use Ammonites and Amminoids
as "index fossils"
(fossils which are used to help
date the rocks that they are found in), particularly for
Mesozoic Era rocks. This
is possible because these fossils
are relatively abundant in rocks,
are widely distributed, and because different species evolved and went
extinct in rapid succession - thus the presence of a particular species
is indicative of rocks being formed in a particular time period.
Ammonites were cephalopod molluscs that lived in the seas between 400 and 65 million years ago
Related Information & Resources
See Also
Ammonite Books Here are some books from Amazon.com:
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By Nicola Griffith
Del Rey Released: April 30th, 2002 Grey Paperback (416 pages)
 | Lowest New Price: $17.00* In Stock.* *(As of 17:15 Pacific 17 Jan 2021 More Info)
Click Here | Description: Ammonite- Manufacturer: Del Rey
- Brand: Del Rey
- ISBN: 0345452380
- EAN: 9780345452382
- PartNumber: 9780345452382
Details:- Paperback
- Edition: Reprint
- Number of Pages: 416
- Author: Nicola Griffith
- Publication Date: April 30th, 2002
- Release Date: April 30th, 2002
Physical Description:- Size: 8.25 Inches by 5.55 Inches by 0.9 Inches
- Weight: 1.05 Pounds
- Color: Grey
Click here for more information |
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By Neale Monks
Smithsonian Books Multicolor Paperback (176 pages)
 | Lowest New Price: $24.95* In Stock.* *(As of 17:15 Pacific 17 Jan 2021 More Info)
Click Here | Description: Ammonites- Manufacturer: Smithsonian Books
- Brand: Smithsonian Books
- ISBNs: 9781588340474, 1588340473
- EAN: 9781588340474
Details:- Paperback
- Edition: First Printing
- Number of Pages: 176
- Authors: Neale Monks, Philip Palmer
Physical Description:- Size: 9.21 Inches by 6.05 Inches by 0.4 Inches
- Weight: 0.78 Pounds
- Color: Multicolor
Features:- Used Book in Good Condition
Click here for more information |
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By Walter E. Aufrecht
Eisenbrauns Released: June 1st, 2019 Hardcover (648 pages)
 | List Price: $119.50* Lowest New Price: $110.55* Usually ships within 6 to 10 days.* *(As of 17:15 Pacific 17 Jan 2021 More Info)
Click Here | Description: A Corpus of Ammonite Inscriptions- Manufacturer: Eisenbrauns
- Brand: Eisenbrauns
- ISBN: 1575063441
- EAN: 9781575063447
Details:- Hardcover
- Edition: 1
- Number of Pages: 648
- Author: Walter E. Aufrecht
- Publication Date: June 1st, 2019
- Release Date: June 1st, 2019
Physical Description:- Size: 10.0 Inches by 7.0 Inches by 2.1 Inches
- Weight: 2.85057704766 Pounds
Click here for more information |
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By Robert Harrington
Ammonite Press Released: May 1st, 2015 Paperback (192 pages)
 | List Price: $23.95* Lowest New Price: $17.79* In stock. Usually ships within 4 to 5 days.* *(As of 17:15 Pacific 17 Jan 2021 More Info)
Click Here | Description: Photographic Lighting (Expanded Guides - Techniques)- Manufacturer: Ammonite Press
- Brand: Ammonite Press
- ISBN: 1907708758
- EAN: 9781907708756
- PartNumber: full colour throughout, includes photogr
Details:- Paperback
- Format: Illustrated
- Edition: Illustrated
- Number of Pages: 192
- Author: Robert Harrington
- Publication Date: May 1st, 2015
- Release Date: May 1st, 2015
Physical Description:- Size: 6.9 Inches by 5.7 Inches by 0.7 Inches
- Weight: 0.75 Pounds
Features:- Used Book in Good Condition
Click here for more information |
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STAR Released: November 1st, 2010 Paperback (299 pages)
 | In Stock.* *(As of 17:15 Pacific 17 Jan 2021 More Info)
Click Here | Description: 1950s Glamour (20th Century Pin-Ups)- Manufacturer: Ammonite Publications
- Brand: STAR
- ISBN: 1906672628
- EAN: 9781906672621
Details:- Paperback
- Number of Pages: 299
- Publication Date: November 1st, 2010
- Release Date: November 1st, 2010
Physical Description:- Size: 8.25 Inches by 8.25 Inches by 1.0 Inches
- Weight: 1.99959271634 Pounds
Features:Click here for more information |
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By Brian Clegg
Ammonite Press Released: March 1st, 2019 Hardcover (96 pages)
 | Lowest New Price: $14.95* In Stock.* *(As of 17:15 Pacific 17 Jan 2021 More Info)
Click Here | Description: Biographic Tesla- Manufacturer: Ammonite Press
- Brand: Ammonite Press
- ISBN: 1781453535
- EAN: 9781781453537
- PartNumber: 150 full-colour illustrations
Details:- Hardcover
- Edition: None
- Number of Pages: 96
- Author: Brian Clegg
- Publication Date: March 1st, 2019
- Release Date: March 1st, 2019
Physical Description:- Size: 8.2499835 Inches by 5.7499885 Inches by 0.5999988 Inches
- Weight: 0.9 Pounds
Click here for more information |
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By Charles Phillips
Ammonite Press Released: March 1st, 2021 Paperback (136 pages)
 | Lowest New Price: $14.95* This title will be released on March 1, 2021. Pre-order now.* *(As of 17:15 Pacific 17 Jan 2021 More Info)
Click Here | Description: The Sherlock Holmes Escape Book: Adventure of the British Museum (2)- Manufacturer: Ammonite Press
- Brand: Ammonite Press
- ISBN: 1781454205
- EAN: 9781781454206
Details:- Paperback
- Number of Pages: 136
- Authors: Charles Phillips, Melanie Frances
- Publication Date: March 1st, 2021
- Release Date: March 1st, 2021
Physical Description:- Size: 7.75 Inches by 5.0 Inches by 0.6 Inches
- Weight: 0.63 Pounds
Click here for more information |
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