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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
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By Nicola Griffith
Del Rey
Kindle Edition (360 pages)
 | Lowest New Price: $12.99*
Available for download now*
*(As of 18:01 Pacific 7 Dec 2024 More Info)
Click Here | Description:
AmmoniteDetails:- Kindle Edition
- Format: Kindle eBook
- Edition: Reprint
- Number of Pages: 360
- Author: Nicola Griffith
Click here for more information |
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By Nicola Griffith
Gollancz
Paperback (416 pages)
 | Lowest New Price: $19.76*
In Stock*
*(As of 18:01 Pacific 7 Dec 2024 More Info)
Click Here | Description:
Ammonite. by Nicola Griffith- Manufacturer: Gollancz
- ISBN: 0575118237
- EAN: 9780575118232
- PartNumber: 11108874
Details:- Paperback
- Number of Pages: 416
- Author: Nicola Griffith
Physical Description:- Size: 7.63778 inches by 5.03936 inches by 1.10236 inches
- Weight: 2.314853751 pounds
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By Ulrich Lehmann
Cambridge University Press
Released: December 31st, 1981
Hardcover (252 pages)
 | Lowest Used Price: $4,995.00*
Usually ships within 4 to 5 weeks*
*(As of 18:01 Pacific 7 Dec 2024 More Info)
Click Here | Description:
The Ammonites: Their Life and Their World- Manufacturer: Cambridge University Press
- ISBN: 0521236274
- EAN: 9780521236270
Details:- Hardcover
- Edition: translated
- Number of Pages: 252
- Author: Ulrich Lehmann
- Publication Date: December 31st, 1981
- Release Date: December 31st, 1981
Physical Description:- Size: 8.97636 inches by 5.98424 inches by 0.70866 inches
- Weight: 1.2786811196 pounds
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By Penelope Lively
Penguin
Released: January 1st, 2014
Paperback (234 pages)
 | Lowest New Price: $19.92*
In Stock*
*(As of 18:01 Pacific 7 Dec 2024 More Info)
Click Here | Description:
Ammonites and Leaping Fish: A Life in Time- Manufacturer: Penguin
- Brand: Penguin
- ISBN: 0241966981
- EAN: 9780241966983
- PartNumber: 9780241966983
Details:- Paperback
- Number of Pages: 234
- Author: Penelope Lively
- Publication Date: January 1st, 2014
- Release Date: January 1st, 2014
Physical Description:- Size: 7.79526 inches by 5.07873 inches by 0.59055 inches
- Weight: 2.314853751 pounds
Click here for more information |
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By Neale Monks
Brand: Smithsonian Books
Multicolor Paperback (176 pages)
 | List Price: $24.95*
Lowest Used Price: $19.99*
In Stock*
*(As of 18:01 Pacific 7 Dec 2024 More Info)
Click Here | Description:
Ammonites- Manufacturer: Smithsonian Books
- Brand: Brand: Smithsonian Books
- ISBNs: 9781588340474, 1588340473
- EAN: 9781588340474
Details:- Paperback
- Edition: First Edition
- Number of Pages: 176
- Authors: Neale Monks, Philip Palmer
Physical Description:- Size: 9.21 inches by 6.05 inches by 0.4 inches
- Weight: 0.7495716908 pounds
- Color: Multicolor
Features:- Used Book in Good Condition
Click here for more information |
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By Ammonite Press
Brand: Ammonite Press
Released: September 1st, 2011
Paperback (192 pages)
 | List Price: $9.95*
Lowest Used Price: $1.89*
In Stock*
*(As of 18:01 Pacific 7 Dec 2024 More Info)
Click Here | Description:
Churchill in "Quotes": Wit and Wisdom from the Great Statesman- Manufacturer: Ammonite Press
- Brand: Brand: Ammonite Press
- ISBN: 190667261X
- EAN: 9781906672614
- PartNumber: Illustrated
Details:- Paperback
- Edition: Illustrated
- Number of Pages: 192
- Author: Ammonite Press
- Publication Date: September 1st, 2011
- Release Date: September 1st, 2011
Physical Description:- Size: 6.5 inches by 6.5 inches by 0.5 inches
- Weight: 0.80027801106 pounds
Features:- Used Book in Good Condition
Click here for more information |
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By Kate LoMedico Marriott & Donald R. Prothero
CRC Press
Released: September 25th, 2023
Paperback (276 pages)
 | List Price: $84.99*
Lowest New Price: $62.69*
Usually ships within 5 to 6 days*
*(As of 18:01 Pacific 7 Dec 2024 More Info)
Click Here | Description:
Evolution of the Ammonoids- Manufacturer: CRC Press
- ISBN: 1032264365
- EAN: 9781032264363
- PartNumber: 9781032264363
Details:- Paperback
- Edition: 1
- Number of Pages: 276
- Authors: Kate LoMedico Marriott, Alexander Bartholomew, Donald R. Prothero
- Publication Date: September 25th, 2023
- Release Date: September 25th, 2023
Physical Description:- Size: 9.99998 inches by 7.00786 inches by 0.63 inches
- Weight: 1.3007273458 pounds
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By Penelope Lively
Random House Books for Young Readers
Released: June 23rd, 2015
Tan Paperback (240 pages)
 | Lowest New Price: $20.90*
In Stock*
*(As of 18:01 Pacific 7 Dec 2024 More Info)
Click Here | Description:
Dancing Fish and Ammonites: A Memoir- Manufacturer: Penguin Books
- Brand: Random House Books for Young Readers
- ISBN: 014312627X
- EAN: 9780143126270
Details:- Paperback
- Edition: Reprint
- Number of Pages: 240
- Author: Penelope Lively
- Publication Date: June 23rd, 2015
- Release Date: June 23rd, 2015
Physical Description:- Size: 7.7 inches by 0.7 inches by 5.0 inches
- Weight: 0.39903669422 pounds
- Color: Tan
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