Facts about Ammonites, an extinct prehistoric animal

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Dinosaur Jungle   >   Other Prehistoric Animals   >   Ammonites

Ammonites



Ammonite Fossil
Click here for more Ammonite Pictures

Scientific Classification
  Kingdom Animalia
  Phylum Mollusca
  Class Cephalopoda
  Subclass Ammonoidea
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:
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 Timeline:



Ammonites were cephalopod molluscs that lived in the seas between 400 and 65 million years ago

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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Ammonite
By Nicola Griffith

Griffith, Nicola
Released: April 30th, 2002
Paperback (416 pages)

Ammonite
List Price: $17.00*
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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
Ammonites
By Neale Monks

Brand: Smithsonian Books
Paperback (176 pages)

Ammonites
List Price: $24.95*
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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
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Ammonites and Leaping Fish: A Life in Time
By Penelope Lively

Penguin
Paperback

Ammonites and Leaping Fish: A Life in Time
Lowest New Price: $16.21*
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Description:
Ammonites and Leaping Fish: A Life in Time
  • Manufacturer: Penguin
  • Brand: Penguin
  • ISBN: 0241966981
  • EAN: 9780241966983
  • PartNumber: 9780241966983
Details:
  • Paperback
  • Author: Penelope Lively
Physical Description:
  • Size: 7.79526 Inches by 5.07873 Inches by 0.59055 Inches
  • Weight: 0.3747858454 Pounds
Features:
  • PENGUIN GROUP
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Ammonite. by Nicola Griffith
By Nicola Griffith

Gollancz
Released: September 1st, 2012
Paperback (416 pages)

Ammonite. by Nicola Griffith
Lowest New Price: $14.11*
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Description:
Ammonite. by Nicola Griffith
  • Manufacturer: Gollancz
  • ISBN: 0575118237
  • EAN: 9780575118232
  • PartNumber: unknown
Details:
  • Paperback
  • Number of Pages: 416
  • Author: Nicola Griffith
  • Publication Date: September 1st, 2012
  • Release Date: September 1st, 2012
Physical Description:
  • Size: 5.43306 Inches by 7.95274 Inches by 1.10236 Inches
  • Weight: 0.64374980504 Pounds
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The Street Beneath My Feet
By Charlotte Guillian

words & pictures
Released: March 23rd, 2017
Hardcover (20 pages)

The Street Beneath My Feet
Lowest New Price: $22.93*
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Description:
The Street Beneath My Feet
  • Manufacturer: words & pictures
  • Brand: words & pictures
  • ISBN: 1784937312
  • EAN: 9781784937317
  • PartNumber: 46013873
Details:
  • Hardcover
  • Number of Pages: 20
  • Author: Charlotte Guillian
  • Publication Date: March 23rd, 2017
  • Release Date: March 23rd, 2017
Physical Description:
  • Size: 13.03147 Inches by 10.07872 Inches by 0.62992 Inches
  • Weight: 1.5873282864 Pounds
Features:
  • QED PUBLISHING
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Dancing Fish and Ammonites: A Memoir
By Penelope Lively

Penguin Books
Released: June 23rd, 2015
Paperback (240 pages)

Dancing Fish and Ammonites: A Memoir
List Price: $17.00*
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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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The Ammonites: Their Life and Their World
By Ulrich Lehmann

Cambridge University Press
Released: December 31st, 1981
Hardcover (252 pages)

The Ammonites: Their Life and Their World
Lowest Used Price: $29.50*
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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: 8.98 Inches by 5.98 Inches by 0.71 Inches
  • Weight: 1.2786811196 Pounds
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Ammonites and the Other Cephalopods of the Pierre Seaway: Identification Guide
By Neil L. Larson, R. A. Farrar, Neal L Larson & Robert A Farrar

Geoscience Pr
Released: February 1st, 1997
Paperback (148 pages)

Ammonites and the Other Cephalopods of the Pierre Seaway: Identification Guide
List Price: $18.00*
Lowest Used Price: $14.98*
Usually ships within 6 to 10 days.*
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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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Mastering Portrait Photography
By Sarah Plater

imusti
Released: April 1st, 2016
Paperback (176 pages)

Mastering Portrait Photography
Lowest New Price: $29.95*
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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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100 Years of Boxing (Twentieth Century in Pictures)
By Ammonite Press

Brand: Ammonite Press
Released: May 1st, 2010
Paperback (300 pages)

100 Years of Boxing (Twentieth Century in Pictures)
List Price: $19.95*
Lowest New Price: $5.52*
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Description:
100 Years of Boxing (Twentieth Century in Pictures)
  • Manufacturer: Ammonite Press
  • Brand: Brand: Ammonite Press
  • ISBN: 1906672555
  • EAN: 9781906672553
  • PartNumber: full colour throughout, 300 photographs
Details:
  • Paperback
  • Number of Pages: 300
  • Author: Ammonite Press
  • Publication Date: May 1st, 2010
  • Release Date: May 1st, 2010
Physical Description:
  • Size: 7.999984 Inches by 7.999984 Inches by 1.999996 Inches
  • Weight: 2.0 Pounds
Features:
  • Used Book in Good Condition
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