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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: $16.43*
In Stock.*
*(As of 08:36 Pacific 17 May 2022 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: 8.2 Inches by 5.5 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)
 | List Price: $24.95*
Lowest New Price: $22.48*
In Stock.*
*(As of 08:36 Pacific 17 May 2022 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 Neil L. Larson, R. A. Farrar, Neal L Larson & Robert A Farrar
Geoscience Pr
Paperback (148 pages)
 | Lowest Used Price: $22.14*
In Stock.*
*(As of 08:36 Pacific 17 May 2022 More Info)
Click Here | Description:
Ammonites and the Other Cephalopods of the Pierre Seaway: Identification Guide- Manufacturer: Geoscience Pr
- Brand: Geoscience Pr
- ISBN: 0945005253
- EAN: 9780945005254
Details:- Paperback
- Edition: 1
- Number of Pages: 148
- Authors: Neil L. Larson, Steven D. Jorgensen, R. A. Farrar, Peter L. Larson, Neal L Larson, Steven D Jorgensen, Robert A Farrar, Peter Larson
Physical Description:- Size: 10.25 Inches by 7.25 Inches by 0.5 Inches
- Weight: 0.8 Pounds
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By CaitlÃn R. Kiernan
PS Publishing
Released: January 1st, 2018
Paperback (259 pages)
 | Lowest New Price: $17.99*
In Stock.*
*(As of 08:36 Pacific 17 May 2022 More Info)
Click Here | Description:
The Ammonite Violin & Others- Manufacturer: PS Publishing
- ISBN: 1848638515
- EAN: 9781848638518
Details:- Paperback
- Number of Pages: 259
- Author: CaitlÃn R. Kiernan
- Publication Date: January 1st, 2018
- Release Date: January 1st, 2018
Physical Description:- Size: 5.39369 Inches by 8.50392 Inches by 0.98425 Inches
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By Nicola Griffith
Gollancz
Paperback (416 pages)
 | Lowest New Price: $14.68*
In stock. Usually ships within 2 to 3 days.*
*(As of 08:36 Pacific 17 May 2022 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: 0.7054792384 Pounds
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By Penelope Lively
Penguin Books
Released: June 23rd, 2015
Tan Paperback (240 pages)
 | List Price: $17.00*
Lowest New Price: $13.75*
In Stock.*
*(As of 08:36 Pacific 17 May 2022 More Info)
Click Here | Description:
Dancing Fish and Ammonites: A Memoir- Manufacturer: Penguin Books
- Brand: Penguin Books
- 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: 0.4 Pounds
- Color: Tan
Click here for more information |
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By Ammonite Press
Ammonite Press
Released: October 1st, 2016
Paperback (512 pages)
 | Lowest New Price: $14.99*
In Stock.*
*(As of 08:36 Pacific 17 May 2022 More Info)
Click Here | Description:
London: A City in Pictures- Manufacturer: Ammonite Press
- Brand: Ammonite Press
- ISBN: 1781452369
- EAN: 9781781452363
- PartNumber: 500 full colour photographs
Details:- Paperback
- Edition: 2nd Second Edition, Second ed.
- Number of Pages: 512
- Author: Ammonite Press
- Publication Date: October 1st, 2016
- Release Date: October 1st, 2016
Physical Description:- Size: 6.5 Inches by 6.5 Inches by 1.5 Inches
- Weight: 2.05 Pounds
Features:Click here for more information |
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By Jon Sparks
Brand: Ammonite Press
Released: July 8th, 2009
Paperback (256 pages)
 | List Price: $19.95*
Lowest Used Price: $3.00*
In Stock.*
*(As of 08:36 Pacific 17 May 2022 More Info)
Click Here | Description:
Nikon D90: The Expanded Guide (Expanded Guides)- Manufacturer: Ammonite Press
- Brand: Brand: Ammonite Press
- ISBN: 1906672407
- EAN: 9781906672409
- PartNumber: AM-17626
Details:- Paperback
- Number of Pages: 256
- Author: Jon Sparks
- Publication Date: July 8th, 2009
- Release Date: July 8th, 2009
Physical Description:- Size: 7.25 Inches by 5.75 Inches by 0.75 Inches
- Weight: 1.05 Pounds
Features:- Used Book in Good Condition
Click here for more information |
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