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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Vulkanischer Block</span></h1>
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<caption>Vulkanische Ablagerungen
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<tbody><tr style="font-weight:normal;"><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 2px solid; padding: 0.2em; background-color:#91C7E9;;">Zusammen-<br>setzung</td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
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<tr style="font-weight:normal;"><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" style="border-right: 1px solid;"><div style="width: 1em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2"><div style="width: 1em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
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<tr style="font-weight:normal;"><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 0px solid; padding: 0.2em; ;">Anteil an<br><a href="Pyroklast" title="Pyroklast">Pyroklasten</a></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
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<tr style="font-weight:normal;"><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-right: 1px solid; border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2"><div style="width: 1em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
<tr style="text-align:center;"><td style="border-right: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-right: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-right: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
<tr style="font-weight:normal;"><td colspan="6" rowspan="2" style="border: 2px solid; padding: 0.2em; background-color:lightgrey;;"><a href="Pyroklastisches_Sediment" title="Pyroklastisches Sediment">Pyroklastika</a><br>> 75%</td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 2px solid; padding: 0.2em; background-color:lightgrey;;"><a href="Tuffit" title="Tuffit">Tuffite</a><br>75–25%</td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 2px solid; padding: 0.2em; background-color:lightgrey;;">Epiklasten<br>< 25%</td></tr>
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<tr style="font-weight:normal;"><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-right: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2"><div style="width: 1em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
<tr style="text-align:center;"><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-right: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
<tr style="font-weight:normal;"><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 0px solid; padding: 0.2em; ;">Verfestigt?</td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
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<tr style="font-weight:normal;"><td colspan="6" rowspan="2" style="border: 0px solid; padding: 0.2em; ;">Ja</td><td><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-right: 1px solid; border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2" style="border-bottom: 1px solid;"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-bottom: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2"><div style="width: 1em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 0px solid; padding: 0.2em; ;">Nein</td></tr>
<tr style="text-align:center;"><td style="border-right: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="2"><div style="width: 2em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td><td style="border-right: 1px solid;"><div style="width: 1em; height: 1em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
<tr style="font-weight:normal;"><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 2px solid; padding: 0.2em; background-color:gainsboro;;">pyroklast.<br>Gestein</td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 2px solid; padding: 0.2em; background-color:gainsboro;;">Tephra</td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
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<tr style="font-weight:normal;"><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 0px solid; padding: 0.2em; ;"><a href="Tuff" title="Tuff">Tuff</a>, <a href="Lapilli" title="Lapilli">Lapillistein</a>,<br><a href="Brekzie#Vulkanische_Brekzien" title="Brekzie">pyroklast. Brekzie</a>,<br><a href="Vulkanisches_Agglomerat" title="Vulkanisches Agglomerat">Agglomerat</a></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td colspan="6" rowspan="2" style="border: 0px solid; padding: 0.2em; ;"><a href="Vulkanische_Asche" title="Vulkanische Asche">Asche</a>, <a href="Lapilli" title="Lapilli">Lapilli</a>,<br><a class="mw-selflink selflink">Blöcke</a> und <a href="Vulkanische_Bombe" title="Vulkanische Bombe">Bomben</a></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
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<tr style="font-weight:normal;"><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td><td rowspan="2" colspan="2"><div style="width: 2em; height: 2em;"><span style="font: 1px/1px serif;"> </span></div></td></tr>
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<p>Ein <b>vulkanischer Block</b> (früher auch Auswürfling) ist ein bei einem <a href="Vulkanausbruch" title="Vulkanausbruch">Vulkanausbruch</a> <a href="Wurfparabel" title="Wurfparabel">ballistisch</a> herausgeschleuderter eckiger <a href="Pyroklast" title="Pyroklast">Pyroklast</a> mit einem Durchmesser von mehr als 64 mm. In der älteren Literatur galt jeder auf einer ballistischen Bahn herausgeschleuderte Pyroklast als <i>Bombe</i>. In der neueren Literatur werden jedoch nur Pyroklasten dieser Größenklasse als <a href="Vulkanische_Bombe" title="Vulkanische Bombe">vulkanische Bomben</a> bezeichnet, die gerundete Formen besitzen bzw. Anzeichen aufweisen, dass sie beim Auswurf und während des Transports schmelzflüssig waren.
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<div class="mw-heading mw-heading2"><h2 id="Charakteristika">Charakteristika</h2></div>
<p>Vulkanische Blöcke haben per Definition einen Durchmesser von > 64 mm; sie können jedoch einen Durchmesser von mehreren Metern erreichen. Sie besitzen eckige und kantige Formen. Die äußere Form und Oberfläche weisen Anzeichen auf, dass der Pyroklast durch Zerbrechen oder Fragmentierung von verfestigten Gesteinen entstanden ist. <a href="Pyroklastisches_Sediment" title="Pyroklastisches Sediment">Pyroklastische Gesteine</a>, die zu mehr als 75 % als vulkanischen Blöcken bestehen, werden <a href="Pyroklastische_Brekzie" title="Pyroklastische Brekzie">pyroklastische Brekzien</a> genannt.
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<div class="mw-heading mw-heading2"><h2 id="Quellen">Quellen</h2></div>
<ul><li>Roger Walter Le Maitre: <i>Igneous rocks: IUGS classification and glossary; recommendations of the International Union of Geological Sciences, Subcommission on the Systematics of Igneous Rocks.</i> 2. Aufl., 236 S., New York, Cambridge University Press 2002, ISBN 0-521-66215-X</li>
<li>Hans Pichler: <i>Italienische Vulkangebiete III, Lipari, Vulcano, Stromboli, Tyrrhenisches Meer</i>. In: Sammlung geologischer Führer (Bd. 69) Gebr. Bornträger, Stuttgart 1981. ISBN 3-443-15028-4</li></ul></div><!--htdig_noindex--><div><div class="zim-footer">
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