1 10 1 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/a2dca59737eb2c3d29333e3962ec3b2c.png 3ba4d8fd1792ea4b1f901fd6231abc77 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/ce333ef152dcc34b5bb15d92b0d8a85e.png b659a0b06a3b027e8a5add24e3407d70 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Fossils Description An account of the resource <p>Welcome to the fossils section of the website. This is designed to help you learn the different characteristics of each major fossil group so that you are able to distinguish between them.</p> <p>First year students, please refer to the specimens housed in the first year teaching laboratory. There is no substitute for handling the specimens themselves; this website is just an accessory to help you along the way.</p> <p>Animals occupy different environments, have different life habits and lived through different periods in geological time. It is good to be aware of these differences in lifestyle and timing, within and between phyla, classes, orders and families.</p> Physical Object An inanimate, three-dimensional object or substance. Note that digital representations of, or surrogates for, these objects should use Moving Image, Still Image, Text or one of the other types. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource <h2>Graptolite</h2> Description An account of the resource <h2>Taxonomy</h2> <p>Phylum: Hemichordata</p> <p>Class: Graptolithina</p> <h2>Diagnostic features</h2> <p>Stick-shape (often branched)</p> <p>One or both edges may appear serrated</p> <p>Thecae</p> <p>Rhabdosome</p> <p>Stipes</p> <h2>Stratigraphic range</h2> <p>Cambrian to Carboniferous (Dendroids)</p> <p>Ordovician to Middle Devonian (Graptoloids)</p> <h2>Way of life</h2> <p>Colonial</p> <p>Planktonic (mostly, although some dendroids were sessile benthonic)</p> <p>Suspension feeders</p> <h2>Typical preservation</h2> <p>Flattened along bedding planes, normally in shales</p> <p>Carbonization or pyritization of the animal</p> <p><a href="https://www.digitalatlasofancientlife.org/learn/nature-fossil-record/types-of-fossil-preservation/">Learn about types of preservation</a></p> <h2>Advanced notes</h2> <p>Graptolites, because of their abundance and variation in morphology are very good index fossils. At a very basic level the angle between the stipes and number of stipes can be used to give a rough age for the fossil, with Early Ordovician graptolites having two stipes with the 'sawtooth' facing each other (pendent), later Ordovician graptolites having a more open oblique or reflex angle between the 'sawtooth' faces, and Siluran graptolites having the 'sawtooth' faces back to back (scandent) or having lost one stipe altogether (for example monograptids).</p> <h2>Specimens</h2> <p><a href="/p1acollections/exhibits/show/graptolites">Browse graptolites</a></p> colonial jaw stick