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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
Griffith, Nicola
Released: April 30th, 2002
Paperback (416 pages)
 | Lowest New Price: $17.00*
In Stock.*
*(As of 18:35 Pacific 1 Jun 2020 More Info)
Click Here | Description:
Ammonite- Manufacturer: Del Rey
- Brand: Griffith, Nicola
- 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
Click here for more information |
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By Neale Monks
Brand: Smithsonian Books
Paperback (176 pages)
 | Lowest New Price: $24.95*
In Stock.*
*(As of 18:35 Pacific 1 Jun 2020 More Info)
Click Here | Description:
Ammonites- Manufacturer: Smithsonian Books
- Brand: Brand: Smithsonian Books
- ISBNs: 9781588340474, 1588340473
- EAN: 9781588340474
- PartNumber: unknown
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
Features:- Used Book in Good Condition
Click here for more information |
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By Sarah Plater
imusti
Released: April 1st, 2016
Paperback (176 pages)
 | Lowest New Price: $29.95*
In Stock.*
*(As of 18:35 Pacific 1 Jun 2020 More Info)
Click Here | Description:
Mastering Portrait Photography- Manufacturer: Ammonite Press
- Brand: imusti
- Model: AM-23139
- ISBN: 1781450854
- EAN: 9781781450857
- PartNumber: MAN-U29-05991781450854
Details:- Paperback
- Number of Pages: 176
- Authors: Sarah Plater, Paul Wilkinson
- Publication Date: April 1st, 2016
- Release Date: April 1st, 2016
Physical Description:- Size: 9.7499805 Inches by 9.7499805 Inches by 0.499999 Inches
- Weight: 1.68 Pounds
Features:- GUILD OF MASTER CRAFTSMEN
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By Penelope Lively
Penguin Books
Released: June 23rd, 2015
Paperback (240 pages)
 | Lowest New Price: $17.00*
In Stock.*
*(As of 18:35 Pacific 1 Jun 2020 More Info)
Click Here | Description:
Dancing Fish and Ammonites: A Memoir- Manufacturer: Penguin Books
- ISBN: 014312627X
- EAN: 9780143126270
- PartNumber: unknown
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
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By Neil L. Larson, R. A. Farrar, Neal L Larson & Robert A Farrar
Geoscience Pr
Released: February 1st, 1997
Paperback (148 pages)
 | Lowest Used Price: $23.99*
Usually ships within 6 to 10 days.*
*(As of 18:35 Pacific 1 Jun 2020 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
- Publication Date: February 1st, 1997
- Release Date: February 1st, 1997
Physical Description:- Size: 10.25 Inches by 7.25 Inches by 0.5 Inches
- Weight: 0.7 Pounds
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By Walter E. Aufrecht
Eisenbrauns
Released: June 11th, 2019
Hardcover (648 pages)
 | List Price: $119.50*
Lowest New Price: $107.94*
In stock. Usually ships within 4 to 5 days.*
*(As of 18:35 Pacific 1 Jun 2020 More Info)
Click Here | Description:
A Corpus of Ammonite Inscriptions- Manufacturer: Eisenbrauns
- ISBN: 1575063441
- EAN: 9781575063447
Details:- Hardcover
- Edition: Second
- Number of Pages: 648
- Author: Walter E. Aufrecht
- Publication Date: June 11th, 2019
- Release Date: June 11th, 2019
Physical Description:- Size: 10.0 Inches by 7.0 Inches by 2.05 Inches
- Weight: 2.85057704766 Pounds
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Ammonite Press
Released: June 1st, 2019
Hardcover (288 pages)
 | List Price: $14.95*
Lowest New Price: $11.69*
In Stock.*
*(As of 18:35 Pacific 1 Jun 2020 More Info)
Click Here | Description:
The Beatles in Pictures- Manufacturer: Ammonite Press
- Brand: Ammonite Press
- ISBN: 1781453497
- EAN: 9781781453490
- PartNumber: 275 colour and B&W photographs
Details:- Hardcover
- Edition: None
- Number of Pages: 288
- Publication Date: June 1st, 2019
- Release Date: June 1st, 2019
Physical Description:- Size: 6.5 Inches by 6.5 Inches by 0.9 Inches
- Weight: 1.32 Pounds
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By Ammonite Press
Brand: Ammonite Press
Released: April 1st, 2012
Paperback (300 pages)
 | Lowest New Price: $12.95*
Temporarily out of stock. Order now and we'll deliver when available. We'll e-mail you with an estimated delivery date as soon as we have more information. Your account will only be charged when we ship the item.*
*(As of 18:35 Pacific 1 Jun 2020 More Info)
Click Here | Description:
Football (Britain in Pictures)- Manufacturer: Ammonite Press
- Brand: Brand: Ammonite Press
- ISBN: 1907708448
- EAN: 9781907708442
- PartNumber: 9781907708442
Details:- Paperback
- Number of Pages: 300
- Author: Ammonite Press
- Publication Date: April 1st, 2012
- Release Date: April 1st, 2012
Physical Description:- Size: 6.5 Inches by 6.5 Inches by 0.75 Inches
- Weight: 1.2 Pounds
Features:- Used Book in Good Condition
Click here for more information |
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