11 10 103 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>Vitreous [lustre]</h2> Subject The topic of the resource Minerals displaying a glass-like lustre are described as vitreous. These minerals are transparent or translucent and have relatively low refractive indices. Quartz and calcite, for example, have vitreous lustre. Description An account of the resource Have a look at <a href="https://wserv3.esc.cam.ac.uk/p1acollections/items/show/57">quartz</a> (M410, M411, M412) and <a href="https://wserv3.esc.cam.ac.uk/p1acollections/items/show/64">calcite</a> (M540, M541, M542) in the Reference Series. 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>Volcanic</h2> Subject The topic of the resource Volcanic rocks and textures are those associated with magmatic eruptions at the surface of the Earth. These eruptions can occur into air, water or ice. In each case cooling is very rapid, causing fine-grained textures to develop. 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>Zonation</h2> Subject The topic of the resource As a crystal grows slowly in a magma chamber the magma from which it is crystallising may evolve, changing its composition. Thus later crystallising regions or “zones” of the crystal will have a slightly different composition from earlier crystallising regions. The crystal thus displays zonation.<br />Zonation is seen under cross-polarised light by variations in the birefringence colours of the different zones. Description An account of the resource <em>Have a look at the <strong>granodiorite (<a href="https://wserv3.esc.cam.ac.uk/p1acollections/items/show/8">L120</a>)</strong> in the 1A Reference Series.</em>