Graptolites

Scientific Classification

Kingdom

Animalia

Phylum

Hemichordata

Class

Graptolithina

Graptolites are an extinct group of marine animals that lived in the seas from the Cambrian period until the end Carboniferous period. The were extremely successful and lived in colonies - there were both benthic (permanently attached to the sea-floor by a "root") and pelagic (floating freely, or attached to seaweed) varieties.

Graptolite are very common, particularly those which were deposited in mud rocks and shales, as a result are often used as "index fossils" - that is to say that rocks can be dated. Additionally, The particular type of graptolite fossil present in a rock can sometimes used by scientists to estimate the temperature or depth of a region at the time of the Graptolite's lifetime.

Although Graptolite fossils tend to be quite common, they are not always easy to see. Even if seen, many casual observers mistake them for fossil plants, and even Carl Linnaeus (the Swedish botanist who was the principle founder of modern taxonomy) regarded them as "pictures resembling fossils rather than true fossils"

Finally, the presence of two distinct types of Grapolites in the rocks of Europe and North America, just like the two distinct types of Trilobites found in the very same rocks, has been regarded as evidence of an ancient ocean (known as the "Iapetus Ocean") that once lay between the two continents. The Iapetus Ocean is thought to have closed-up again when all the continents joined together in the super-continent of Pangaea - and when a new ocean (the Atlantic Ocean), separating Europe and North America, did eventually appear, it did so along a somewhat different line of separation.

Evidence for the Iapetus Ocean

Graptolites Timeline:

Graptolites were marine colonial animals that lived from the Cambrian period to the Carboniferous periods

Related Information & Resources

Graptolite Books

Here are some books from Amazon.com:

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Dendroid Graptolites Of The Niagaran Dolomites At Hamilton, Ontario (1909)

Kessinger Publishing, LLC Paperback (100 pages)	List Price: $18.95^* Lowest New Price: $11.55^* Lowest Used Price: $13.40^* Usually ships in 24 hours^* ^(As of 22:03 Pacific 16 May 2012 More Info) Click Here*
Product Description: This book is a facsimile reprint and may contain imperfections such as marks, notations, marginalia and flawed pages.

Graptolites De Bohême... (French Edition)

By Joachim Barrande

Nabu Press
Paperback (110 pages)

List Price: $19.75^*
Lowest New Price: $12.66^*
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Product Description:
This is a reproduction of a book published before 1923. This book may have occasional imperfections
such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact,
or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections,
have elected to bring it back into print as part of our continuing commitment to the preservation of printed works
worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.

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The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification:

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Graptolites De Bohême<br/><br/><author> Joachim Barrande<br/><br/><publisher> L'auteur, 1850<br/><br/><subjects> Graptolites; Paleontology</FONT></TD></TR></TABLE></TD></TR></TABLE><TABLE WIDTH="100%" COLS=1 CELLPADDING=0 CELLSPACING=0 RULES=NONE BORDER=1><TR><TD><TABLE WIDTH="100%" COLS=1 CELLPADDING=3 CELLSPACING=0 RULES=NONE BORDER=0 BGCOLOR="#FFFFFF"><TR><TD ALIGN="LEFT"><BIG><B><A HREF="http://www.amazon.com/Graptolites-Writing-Rocks-Fossils-Illustrated/dp/0851152627%3FSubscriptionId%3D1PBBW85R76PQTM62KDG2%26tag%3Danswers2000limit%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3D0851152627" onmouseover="window.status='Graptolites: Writing in the Rocks (Fossils Illustrated)';return true;" onmouseout="window.status='';return true;" TARGET="_top">Graptolites: Writing in the Rocks (Fossils Illustrated)</A></B></BIG></TD></TR></TABLE><TABLE WIDTH="100%" COLS=2 CELLPADDING=5 CELLSPACING=0 RULES=NONE BORDER=0 BGCOLOR="#FFFFFF"><TR><TD WIDTH="50%" VALIGN="TOP" ALIGN="LEFT"><FONT FACE="Arial,Verdana" SIZE="2">Boydell Press<BR>Hardcover (328 pages)<BR><BR><CENTER><A HREF="http://www.amazon.com/Graptolites-Writing-Rocks-Fossils-Illustrated/dp/0851152627%3FSubscriptionId%3D1PBBW85R76PQTM62KDG2%26tag%3Danswers2000limit%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3D0851152627" onmouseover="window.status='Graptolites: Writing in the Rocks (Fossils Illustrated)';return true;" onmouseout="window.status='';return true;" TARGET="_top"><IMG SRC="http://ecx.images-amazon.com/images/I/51803XBG9BL._SL160_.jpg" WIDTH="111" HEIGHT="160" BORDER="0" ALT="Graptolites: Writing in the Rocks (Fossils Illustrated)"></A></CENTER></FONT></TD><TD WIDTH="50%" VALIGN="TOP" ALIGN="CENTER"><FONT FACE="Arial,Verdana" SIZE="2">List Price: $95.00<SUP>*</SUP><BR>Lowest Used Price: $135.00<SUP>*</SUP><BR><SUP>*</SUP><SMALL>(As of 22:03 Pacific 16 May 2012 <A HREF="javascript:alert('Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.');">More Info</A>)</SMALL><BR><BR><BR><A HREF="http://www.amazon.com/Graptolites-Writing-Rocks-Fossils-Illustrated/dp/0851152627%3FSubscriptionId%3D1PBBW85R76PQTM62KDG2%26tag%3Danswers2000limit%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3D0851152627" onmouseover="window.status='Graptolites: Writing in the Rocks (Fossils Illustrated)';return true;" onmouseout="window.status='';return true;" TARGET="_top"><BIG><B>Click Here</B></BIG></A></FONT></TD></TR><TR><TD WIDTH="100%" COLSPAN="2" VALIGN="TOP" ALIGN="LEFT"><FONT FACE="Arial,Verdana" SIZE="2"><B>Product Description:</B><BR>Graptolites lived in the earth's oceans from 540 million years ago to 320 million years ago, when they became extinct. For most of that time they dominated the upper layers of the ocean in tropical regions as the earth's first large zooplankton. They varied from a few millimetres in length to more than a metre; they lived by the countless billion, and their skeletons are preserved today in vast numbers in varied strata in every continent except Antarctica. Because of their diversity, they are a powerful correlative tool: units of time of much less than a million years are identifiable, and within individual rock sequences evolutionary changes can be studied, which makes them of prime importance to economic geologists. Graptolites are, however, still the subject of lively debate — little is established about their lives, and although skeletons abound, the soft parts of only one graptolite have been found — in deposits 500 million years old in Tasmania. As well as providing a full summary of the current state of knowledge relating to graptolites, the team of specialists who contribute to this book also address the biological questions raised by these fossils, and provide pointers for further research. Contents: Part I. The Organism: Definition and appearance; Preservation; Construction; Distribution; Biology; Evolution; Relationship to other organisms; Sex life. Part II. The Fossil: Collection and preparation; Identification; Correlative uses. Appendices: Glossary of technical terms; Where to find them in Britain and other countries; Classification and evolution; Further reading.BARRIE RICKARDS is Reader in Palaeobiology, University of Cambridge, and curator of the Sedgwick Museum of Geology. DOUGLAS PALMER is a freelance geologist and writer.</FONT></TD></TR></TABLE></TD></TR></TABLE><TABLE WIDTH="100%" COLS=1 CELLPADDING=0 CELLSPACING=0 RULES=NONE BORDER=1><TR><TD><TABLE WIDTH="100%" COLS=1 CELLPADDING=3 CELLSPACING=0 RULES=NONE BORDER=0 BGCOLOR="#FFFFFF"><TR><TD ALIGN="LEFT"><BIG><B><A HREF="http://www.amazon.com/Ludlow-Pridoli-Silurian-Graptolites-Islands/dp/0660193264%3FSubscriptionId%3D1PBBW85R76PQTM62KDG2%26tag%3Danswers2000limit%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3D0660193264" onmouseover="window.status='Ludlow and Pridoli (Upper Silurian) Graptolites from the Arctic Islands, Canada';return true;" onmouseout="window.status='';return true;" TARGET="_top">Ludlow and Pridoli (Upper Silurian) Graptolites from the Arctic Islands, Canada</A></B></BIG></TD></TR></TABLE><TABLE WIDTH="100%" COLS=2 CELLPADDING=5 CELLSPACING=0 RULES=NONE BORDER=0 BGCOLOR="#FFFFFF"><TR><TD WIDTH="50%" VALIGN="TOP" ALIGN="LEFT"><FONT FACE="Arial,Verdana" SIZE="2">NRC Research Press<BR>Paperback (141 pages)<BR><BR><CENTER><A HREF="http://www.amazon.com/Ludlow-Pridoli-Silurian-Graptolites-Islands/dp/0660193264%3FSubscriptionId%3D1PBBW85R76PQTM62KDG2%26tag%3Danswers2000limit%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3D0660193264" onmouseover="window.status='Ludlow and Pridoli (Upper Silurian) Graptolites from the Arctic Islands, Canada';return true;" onmouseout="window.status='';return true;" TARGET="_top"><IMG SRC="http://ecx.images-amazon.com/images/I/51kwpsGno4L._SL160_.jpg" WIDTH="122" HEIGHT="160" BORDER="0" ALT="Ludlow and Pridoli (Upper Silurian) Graptolites from the Arctic Islands, Canada"></A></CENTER></FONT></TD><TD WIDTH="50%" VALIGN="TOP" ALIGN="CENTER"><FONT FACE="Arial,Verdana" SIZE="2">Lowest New Price: <B>$111.66</B><SUP>*</SUP><BR>Lowest Used Price: $111.67<SUP>*</SUP><BR><SUP>*</SUP><SMALL>(As of 22:03 Pacific 16 May 2012 <A HREF="javascript:alert('Product prices and availability are accurate as of the date/time indicated and are subject to change. 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Lenz<BR><BR>Geological Assn of Canada<BR>Paperback (61 pages)<BR></FONT></TD><TD WIDTH="50%" VALIGN="TOP" ALIGN="CENTER"><FONT FACE="Arial,Verdana" SIZE="2">List Price: $29.00<SUP>*</SUP><BR>Lowest New Price: <B>$29.00</B><SUP>*</SUP><BR>Usually ships in 24 hours<SUP>*</SUP><BR><SUP>*</SUP><SMALL>(As of 22:03 Pacific 16 May 2012 <A HREF="javascript:alert('Product prices and availability are accurate as of the date/time indicated and are subject to change. 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P. Hughes<BR><BR>Blackwell Science Inc<BR>Hardcover (288 pages)<BR></FONT></TD><TD WIDTH="50%" VALIGN="TOP" ALIGN="CENTER"><FONT FACE="Arial,Verdana" SIZE="2">List Price: $75.00<SUP>*</SUP><BR>Lowest Used Price: $4.97<SUP>*</SUP><BR><SUP>*</SUP><SMALL>(As of 22:03 Pacific 16 May 2012 <A HREF="javascript:alert('Product prices and availability are accurate as of the date/time indicated and are subject to change. 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Lenz<BR><BR>University of Toronto Press<BR>Hardcover (154 pages)<BR></FONT></TD><TD WIDTH="50%" VALIGN="TOP" ALIGN="CENTER"><FONT FACE="Arial,Verdana" SIZE="2">Lowest Used Price: $63.58<SUP>*</SUP><BR><SUP>*</SUP><SMALL>(As of 22:03 Pacific 16 May 2012 <A HREF="javascript:alert('Product prices and availability are accurate as of the date/time indicated and are subject to change. 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