22 10 264 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/97e8a733fc57a161d47dd64c99093898.png c46f414d813069a904bb58a2ffc55d02 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Length fast</h2> Subject The topic of the resource <span>All anisotropic minerals have fast and slow vibration directions. If the </span><strong>fast</strong><span><strong> </strong>vibration direction is parallel to the direction of <strong>elongation</strong> of the crystal, the crystal is length </span><strong>fast</strong><span>.</span> Description An account of the resource <em>Compare with<span> </span><a href="https://wserv3.esc.cam.ac.uk/p1acollections/items/show/217">length slow</a>.</em> https://wserv3.esc.cam.ac.uk/p1acollections/files/original/81e57bff0e0f73628e60e3acfdb8c6c9.png c46f414d813069a904bb58a2ffc55d02 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Length slow</h2> Subject The topic of the resource <span>All anisotropic minerals have fast and slow vibration directions. If the </span><strong>slow</strong><span><strong> </strong>vibration direction is parallel to the direction of <strong>elongation</strong> of the crystal, it is said to be length </span><strong>slow</strong><span>.</span> Description An account of the resource <em>Compare with<span> </span><a href="https://wserv3.esc.cam.ac.uk/p1acollections/items/show/216">length fast</a>.</em> 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Leucocratic</h2> Subject The topic of the resource <div> <div class="element-set"> <div class="element"> <div class="element-text"> <p>Leucocratic rocks have a low colour index. That is to say that &lt;30 vol% of the rock is made up of ferromagnesian minerals.</p> </div> </div> </div> </div> https://wserv3.esc.cam.ac.uk/p1acollections/files/original/3a9d04c4ac48f8b0442cd4291001813e.png e147375859f11af9c25ce609d2d7681a https://wserv3.esc.cam.ac.uk/p1acollections/files/original/f6c2d2ec923519531106f015ae2a7833.png a6a2e805116df4fcb5e9ca3dd1a6dac3 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Lineation</h2> Subject The topic of the resource <div> <div class="element-set"> <div class="element"> <div class="element-text"> <p>This refers to any pervasive linear feature in a rock. It can be produced by the intersection of two foliations (planar rock fabrics) or by the alignment of linear objects such as elongate grains in the rock. Linear fabrics can be primary (e.g. flow lineations) or secondary (e.g. mineral alignment during metamorphism).</p> </div> </div> </div> </div> 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Lustre</h2> Subject The topic of the resource A combination of the intensity and quality of the light reflected from the surface of a mineral. A number of terms are used to describe the range of lustres displayed by minerals, including adamantine, dull, metallic, pearly, resinous and vitreous. 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Macrocryst</h2> Subject The topic of the resource A relatively large crystal, usually occurring within an igneous rock. Unlike the term phenocryst, it does not imply a petrogenetic link between the crystal and the surrounding magma. Description An account of the resource <em>Compare with<span> </span><a href="https://wserv3.esc.cam.ac.uk/p1acollections/items/show/236">phenocryst</a>.</em> 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Melanocratic</h2> Subject The topic of the resource Melanocratic rocks have a high colour index. That is to say that 60-90 vol% of the rock is made up of ferromagnesian minerals. 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Mesocratic</h2> Subject The topic of the resource Mesocratic rocks have a moderate colour index. That is to say that 30-60 vol% of the rock is made up of ferromagnesian minerals. 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Metallic [lustre]</h2> Subject The topic of the resource Minerals displaying a metal-like lustre are described as metallic. These minerals have surfaces which are perfectly reflective. Pyrite, for example, has metallic lustre. Description An account of the resource <em>Have a look at <strong>pyrite (<a href="https://wserv3.esc.cam.ac.uk/p1acollections/items/show/60">M520</a>)</strong> in the 1A Reference Series.</em> 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/. Description An account of the resource This glossary describes a number of geological terms with which the 1A students should become familiar.<span> It is by no means an exhaustive list, but is aimed to help you understand the material within the first year course.</span> Title A name given to the resource Glossary 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>Micaceous</h2> Subject The topic of the resource A rock containing a significant proportion of micas is described as micaceous. The micas are a group of sheet silicate minerals, which include biotite and muscovite. Description An account of the resource <em>Have a look at <strong><a href="https://wserv3.esc.cam.ac.uk/p1acollections/items/show/51">muscovite mica</a> (M301, M302) </strong>and <strong><a href="https://wserv3.esc.cam.ac.uk/p1acollections/items/show/52">biotite mica</a> (M303, M304)</strong> in the 1A Reference Series.</em>