1 10 1 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/a7df9ee4ba246ad0597901f02ce9248e.jpg c00e1ed63dab525439bafbcd93e404ad https://wserv3.esc.cam.ac.uk/p1acollections/files/original/a96297a90c4701546417a62762349b0c.jpg 10d02e1fb68349bfd8e84366835b2ca5 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/5ef179694fabe2f138284ddd124cda39.jpg 712079ecee63ba6327aad3a1eddff03e 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><strong>L521<br /></strong></h2> <h2>Quartzite</h2> Subject The topic of the resource <h3>Age</h3> <div class="element-text"> <p>Precambrian</p> <h3>Location</h3> <div class="element-text"> <p>Braemar, Aberdeenshire</p> </div> </div> Description An account of the resource <div class="element"> <div class="element"> <h3>Hand Specimen</h3> <div class="element-text"> <p>Buff coloured rock.<br />Almost pure quartz, which has been very well recrystallised.<br />Faint banding could be original bedding.</p> </div> </div> <div class="element"> <h3>Thin-section</h3> <div class="element-text"> <p>Fine to medium grained recrystallised quartz with<span> </span><a href="/p1acollections/items/show/257">sutured contacts</a>.</p> </div> </div> <div class="element"> <h3>Rock History</h3> <div class="element-text"> <p>The sutured (ragged) grain boundaries and<span> </span><a href="/p1acollections/items/show/263">undulose extinction</a><span> </span>of the quartz grains indicate that this rock formed under relatively low temperature metamorphism. Had the rock been raised to higher temperatures perfect 120° grain boundaries would have formed, and the quartz would not be strained.</p> <p class="NoSpacing">Inserting the sensitive tint plate results in the vast majority of grains changing colour in the same way – most of the grains simultaneously display higher interference colours in one orientation, and lower interference colours in the other orientation. This strong<span> </span><a href="/p1acollections/items/show/192">fabric</a><span> </span>was produced by recrystallisation under directed stress, which caused all the grains to elongate in one direction. </p> </div> </div> <div class="element"></div> <div class="element"> <h3>Rock Name</h3> <div class="element-text">quartzite</div> </div> </div> banding foliation suture