1 10 1 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/9c74043dd4765743a7af9b90b0f50ef4.jpg ac96894746f8137ce25d5f1f809dfa00 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/afce700bce529e295af89d899592b41e.jpg ef8d9d97da68dd0afcc64131b171809e https://wserv3.esc.cam.ac.uk/p1acollections/files/original/0e48212f1384b76ca45fc688ba4e0b6d.jpg 0efd2cfb2ca972cc8e8ebbb0583ac682 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>L311<br /></strong></h2> <h2>Conglomerate</h2> Subject The topic of the resource <h3>Age</h3> <div class="element-text">Eocene<br /><h3>Location</h3> <div class="element-text">Hertfordshire</div> </div> Description An account of the resource <div class="element-set"> <div class="element"></div> </div> <div class="element-set"> <div class="element"> <h3>Hand Specimen</h3> <div class="element-text">Poorly sorted. Rounded clasts up to ~15 mm long.<span> </span><br />Pale yellow matrix of quartz grains.<span> </span><br />Cement fizzes with acid, indicating that it contains carbonate.<span> </span><br />This conglomerate is just clast-supported.</div> </div> <div class="element"> <h3>Thin-section</h3> <div class="element-text"> <p>Rounded clasts of very dark red brown<span> </span><a href="/p1acollections/items/show/171">amorphous</a><span> </span>silica (chert) and<span> </span><a href="/p1acollections/items/show/242">polycrystalline</a> quartz.</p> <p>Matrix of quartz grains (typically 0.25 mm) and fine-grained carbonate cement (sparite). Dark red-brown<span> </span><span>iron staining</span>.</p> </div> </div> <div class="element"> <h3>Rock History</h3> <div class="element-text">Deposited in a high energy environment.</div> </div> <div class="element"> <h3>Advanced Notes</h3> <div class="element-text"> <p><span>Iron staining</span><span> </span><br />Hematite (Fe₂O₃) → red (blood-red, cherry-red, brown-red) iron-staining<span> </span><br />Limonite (FeO(OH)•nH₂O) → yellow or brown iron-staining</p> <p>The red-brown colour of this rock is probably produced by hematite.</p> </div> </div> <div class="element"></div> <div class="element"></div> <div class="element"> <h3>Rock Name</h3> <div class="element-text">conglomerate</div> </div> </div> clast supported high energy