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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Lapilli</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>
<tr style="text-align:center;"></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 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 class="mw-selflink selflink">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 class="mw-selflink selflink">Lapilli</a>,<br><a href="Vulkanischer_Block" title="Vulkanischer Block">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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<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;;">Transport-<br>weg</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>Unter <b>Lapilli</b> (<a href="Italienische_Sprache" title="Italienische Sprache">italienisch</a> „Steinchen“) werden in der <a href="Vulkanologie" title="Vulkanologie">Vulkanologie</a> erbsen- bis nussgroße (2–64 mm große) <a href="Pyroklast" title="Pyroklast">Pyroklasten</a> bezeichnet, die bei einem explosiven <a href="Vulkanausbruch" title="Vulkanausbruch">Vulkanausbruch</a> gefördert werden. Die Lapilli bilden zusammen mit den <a href="Vulkanische_Asche" title="Vulkanische Asche">vulkanischen Aschen</a> (< 2 mm), den <a href="Vulkanische_Bombe" title="Vulkanische Bombe">Bomben</a> (> 64 mm, gerundet, ursprünglich geschmolzen) und den <a href="Vulkanischer_Block" title="Vulkanischer Block">vulkanischen Blöcken</a> (> 64 mm, eckig, zum Zeitpunkt des Auswurfs bereits fest) die <a href="Pyroklastisches_Sediment" title="Pyroklastisches Sediment">pyroklastischen Sedimente</a> (auch Tephra genannt, wenn unverfestigt) bzw. die pyroklastischen Gesteine (wenn verfestigt).
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<div class="mw-heading mw-heading2"><h2 id="Charakteristika">Charakteristika</h2></div>
<p>Der Begriff Lapilli bezeichnet also nur eine <a href="Korngr%C3%B6%C3%9Fe" title="Korngröße">Korngröße</a> und ist keine genetische Bezeichnung. Lapilli können daher aus <a href="Lava" title="Lava">Lavafetzen</a>, <a href="Lava" title="Lava">Schlacken</a>, Resten alter <a href="Schlot_(Geologie)" title="Schlot (Geologie)">Schlotfüllungen</a> oder <a href="Xenolith" title="Xenolith">Xenolithen</a> bestehen. Lapilli können pyroklastische <a href="Pyroklastische_Fallablagerung" title="Pyroklastische Fallablagerung">Fall-</a> oder <a href="Pyroklastische_Flie%C3%9Fablagerung" title="Pyroklastische Fließablagerung">Fließablagerungen</a> bilden. Ein pyroklastisches Gestein, das überwiegend (> 75 %) aus Lapilli besteht, wird Lapillistein genannt. Ein Lapilli-<a href="Tuff" title="Tuff">Tuff</a> ist dagegen ein pyroklastisches Gestein, das weniger als 25 % <a href="Vulkanische_Bombe" title="Vulkanische Bombe">Bomben</a> und Blöcke enthält und mehr als 75 % Lapilli <i>und Asche</i>. Insgesamt müssen diese Ablagerungen jedoch zu mehr als 75 % aus <a href="Pyroklast" title="Pyroklast">Pyroklasten</a> bestehen.
</p><p><i>Akkretionäre Lapilli</i> sind lapilligroße Zusammenballungen von Aschefragmenten, die bei <a href="Phreatomagmatische_Explosion" title="Phreatomagmatische Explosion">phreatomagmatischen Explosionen</a> gefördert werden. Sie entstehen, wenn sich Aschepartikel um einen „Kern“ herum anlagern. Dieser Nukleus kann z. B. ein fester Partikel, aber auch ein Wassertropfen sein. Auf letztere Weise entstehen sie, wenn <a href="Regentropfen" class="mw-redirect" title="Regentropfen">Regentropfen</a> durch die <a href="Eruptionss%C3%A4ule" title="Eruptionssäule">Eruptionssäule</a> fallen und sich dabei Asche um die Tropfen herum anlagert. Akkretionäre Lapilli kommen sowohl in pyroklastischen Fall- wie auch in pyroklastischen Fließablagerungen vor.
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<div class="mw-heading mw-heading2"><h2 id="Literatur">Literatur</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 class="mw-heading mw-heading2"><h2 id="Weblinks">Weblinks</h2></div>
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