1 10 2 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/00db217bd8288150c439f1ca37a8cfec.jpg 20ab67c34086aeea11bab20c8a79886e https://wserv3.esc.cam.ac.uk/p1acollections/files/original/dec6f2245ea893d30d732fad22681274.jpg 2c9eeea810ad45f5041e688c15f68300 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/df792c1dff764855c0f5a8bca4f4832b.jpg ea4c3e9e50b4e890ff1f6c1f86466fdb 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>L310<br /></strong></h2> <h2>Breccia</h2> Subject The topic of the resource <h3>Specimen Age</h3> <div class="element-text"> <p>Permian</p> <h3>Location</h3> <div class="element-text"> <p>Brockram, Cumbria</p> </div> </div> Description An account of the resource <div class="element-set"> <div class="element"> <div class="element-text"> <h3>Hand Specimen</h3> </div> </div> </div> <div class="element-set"> <div class="element"> <div class="element-text"> <p>Very poorly sorted.Angular to sub-angular clasts up to 30 mm long. Randomly orientated.<span> </span><br />Clasts mainly pale grey, some white, some red.<span> </span><br />Red-brown colour of the fine-grained matrix indicates<span> </span><span>iron staining</span>.<span> </span><br />Matrix and some clasts fizz with acid, indicating that they are made of carbonate. This is a limestone.</p> </div> </div> <div class="element"> <h3>Thin-section</h3> <div class="element-text">Variety of clasts: sedimentary rock fragments, carbonate and feldspar crystals, fine-grained quartz and carbonate, some bioclasts. Clasts are quite angular.<br />Matrix of very fine-grained clays containing fragments of quartz and carbonate.</div> </div> <div class="element"> <h3>Rock History</h3> <div class="element-text">Clast-supported. Clasts are angular, so sediments cannot have been transported far. (NB, if this rock were matrix supported the clasts could have been transported a long way without losing their angularity.)<span> </span><br />Probably scree accumulation during desert conditions, from approximately the same horizon as L326.</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">breccia</div> </div> </div> clastic scree https://wserv3.esc.cam.ac.uk/p1acollections/files/original/84c1834164497c8491f5db12efcef6d2.jpg c9a7faba04f5ca2d06682176ab35e8a8 https://wserv3.esc.cam.ac.uk/p1acollections/files/original/b718221d8d279140605b8befd4e9d749.jpg 691b6ce9581e994fa11d953b4fd41bfb https://wserv3.esc.cam.ac.uk/p1acollections/files/original/c501e1086a63d3623e85cb1f1be70780.jpg b09c139b55148cacb06439964118c472 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>L200<br /></strong></h2> <h2>Volcanic Breccia</h2> Subject The topic of the resource <h3>Age</h3> <div class="element-text"> <p>Carboniferous</p> <h3>Location</h3> <div class="element-text"> <p>Melrose, Scotland</p> </div> </div> Description An account of the resource <div class="element-set"> <div class="element"> <div class="element-text"> <h3>Hand Specimen</h3> </div> </div> </div> <div class="element-set"> <div class="element"> <div class="element-text"> <p>Sedimentary textures, very poorly sorted.<span> </span><br />Sub-round to angular grains up to 20mm across.<span> </span><br />Wide variety of clasts: dark purple, cream, rusty orange, grey, several types of lava.<span> </span><br />Some black, shiny igneous crystals.<span> </span><br />Brown-grey matrix of<span> </span><a href="/p1acollections/items/show/266">volcanic</a><span> </span>ash.</p> </div> </div> <div class="element"> <h3>Thin section</h3> <div class="element-text">Wide range of clasts including<br />- Basalt<br />- Slate or phyllite<br />- Schist<br />- Chert<br />- Sandstone<br />- Carbonate<br />- Quartz<br /><br />Matrix of fine volcanic ash.</div> </div> <div class="element"> <h3>Rock History</h3> <div class="element-text">This is an example of the coarser type of material deposited by explosive volcanic action.<br /><br />NB,<br />This is not a typical volcanic breccia, as one usually sees a greater abundance of igneous clasts; other clasts could be wall-rock. Another name for this rock could be “lithic wacke”.</div> </div> <div class="element"></div> <div class="element"></div> <div class="element"> <h3>Rock Name</h3> <div class="element-text">volcanic breccia<br />lithic wacke</div> </div> </div> clastic extrusive lithic