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width:655px; border-bottom: 1px #C4D5E3 dotted; height:40px; Xbackground-color:#ab0; "> <div style="float:left; height:35px; Xbackground-color:#005;"> <p><em>Posted by <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/members/emervine/">Evelyn Mervine</a></em></p> </div> <div class="addthis_single" style="float:right; Xbackground-color:#f55; padding-top:6px; height:35px;">  <div class="addthis_toolbox addthis_default_style"><a class="addthis_button_google_plusone" g:plusone:size="medium"></a> <a class="addthis_button_facebook_like" fb:like:layout="button_count"></a> <a class="addthis_button_tweet"></a> <a class="addthis_counter addthis_pill_style"></a> </div> <script type="text/javascript">var addthis_config = {"data_track_clickback":true};</script> <script type="text/javascript" src="https://web.archive.org/web/20170504194033js_/http://s7.addthis.com/js/250/addthis_widget.js#username=mjvinas"></script>  </div> <div style="clear:both;"></div> </div> <div class="entry" style="margin-top:15px;"> <div id="attachment_1814" style="width: 510px" class="wp-caption aligncenter"><a rel="attachment wp-att-1814" href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/2012/01/25/accretionary-wedge-42-countertop-geology/olympus-digital-camera-85/"><img class="size-large wp-image-1814" title="OLYMPUS DIGITAL CAMERA" src="https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/P1170272-1024x768.jpg" alt="" width="500" height="375" srcset="https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/P1170272-1024x768.jpg 1024w, https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/P1170272-300x225.jpg 300w" sizes="(max-width: 500px) 100vw, 500px"/></a><p class="wp-caption-text">My friend's front entryway in Abu Dhabi. Can you spot the xenolith?</p></div> <p>Ian Saginor of the blog <a href="https://web.archive.org/web/20170504194033/http://volcanoclast.com/">Volcanoclast</a> is hosting this month’s accretionary wedge, and this month’s theme is countertop geology!</p> <p>Here’s the <a href="https://web.archive.org/web/20170504194033/http://volcanoclast.com/call-for-posts-accretionary-wedge-42-countertop-geology/">call for posts</a>:</p> <blockquote><p>Have you seen a great countertop out there? Sure, everyone says it’s “granite”, but you know better. Take a picture, post it on your own blog or send it to me and I’ll post it for you. Do you think you know what it is or how it was formed? Feel free to include your own interpretation and I’m sure others will enjoy joining in the discussion. Ron Schott suggested that we expand the entries by including any decorative stone material that has been separated by humans from its source. This includes buildings, statues, etc. There’s a lot of really unusual stuff out there, so make sure to find a good one.</p></blockquote> <p>I think this is a great topic for an accretionary wedge! Anyone who has spent any amount of time with me knows that I am constantly looking at stone countertops, floors, walls, statues, and pretty much anything else made out of rock. Actually, I just visited by good friend Karima in Abu Dhabi, and she and her husband laughed at how I inspected the walls of all of the buildings we visited. I couldn’t help myself– there is some spectacular building stone to be found in Abu Dhabi. I was particularly impressed with all of the amazing building stones used in the <a href="https://web.archive.org/web/20170504194033/http://en.wikipedia.org/wiki/Sheikh_Zayed_Mosque">Sheikh Zayed Mosque</a> and the <a href="https://web.archive.org/web/20170504194033/http://en.wikipedia.org/wiki/Emirates_Palace_Hotel">Emirates Place Hotel</a>. My friend Karima actually joked that when we visited the Emirates Palace hotel and <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/2012/01/16/monday-geology-picture-a-gneiss-staircase-in-abu-dhabi/">ate our gold-flaked dessert</a>, I kept looking at the floors and walls rather than enjoying the spectacular ocean and city views. However, I’m actually planning to share pictures of those two buildings in other posts. For this accretionary wedge post, I’m actually going to share some pictures of my friend Karima’s front entryway to her house in Abu Dhabi.</p> <p>Karima and her family live in a lovely two-story house (with a rooftop balcony) in Abu Dhabi. In front of their house, they have lovely slabs of granite decorating their front steps and entryway. They also happen to have a dark-colored <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/2011/05/18/geology-word-of-the-week-x-is-for-xenolith/">xenolith</a> just in front of their front door! The xenolith caught my eye as soon as I arrived at their house, and it actually reminded me very much of the dark-colored xenoliths I often observe in the Cape Granite here in Cape Town.</p> <p>Here are some pictures of my friend’s front entryway xenolith:</p> <div id="attachment_1815" style="width: 510px" class="wp-caption aligncenter"><a rel="attachment wp-att-1815" href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/2012/01/25/accretionary-wedge-42-countertop-geology/olympus-digital-camera-86/"><img class="size-large wp-image-1815" title="OLYMPUS DIGITAL CAMERA" src="https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/P1170269-1024x768.jpg" alt="" width="500" height="375" srcset="https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/P1170269-1024x768.jpg 1024w, https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/P1170269-300x225.jpg 300w" sizes="(max-width: 500px) 100vw, 500px"/></a><p class="wp-caption-text">Dark-colored xenolith in granite. </p></div> <div id="attachment_1816" style="width: 510px" class="wp-caption aligncenter"><a rel="attachment wp-att-1816" href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/2012/01/25/accretionary-wedge-42-countertop-geology/olympus-digital-camera-87/"><img class="size-large wp-image-1816" title="OLYMPUS DIGITAL CAMERA" src="https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/P1170270-1024x768.jpg" alt="" width="500" height="375" srcset="https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/P1170270-1024x768.jpg 1024w, https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/P1170270-300x225.jpg 300w" sizes="(max-width: 500px) 100vw, 500px"/></a><p class="wp-caption-text">And here's one with my hand for scale.</p></div> <p>And here’s a picture of a similar looking dark-colored xenolith in the Cape Granite here in South Africa:</p> <div class="mceTemp mceIEcenter" style="text-align: left;"> <dl id="attachment_1817" class="wp-caption aligncenter" style="width: 624px;"> <dt class="wp-caption-dt"><a rel="attachment wp-att-1817" href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/2012/01/25/accretionary-wedge-42-countertop-geology/o-28/"><img class="size-full wp-image-1817 " title="O" src="https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/Xenolith_MonGeoPicture1.jpg" alt="" width="614" height="461" srcset="https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/Xenolith_MonGeoPicture1.jpg 1024w, https://web.archive.org/web/20170504194033im_/http://blogs.agu.org/georneys/files/2012/01/Xenolith_MonGeoPicture1-300x225.jpg 300w" sizes="(max-width: 614px) 100vw, 614px"/></a></dt> <dd class="wp-caption-dd">A similar looking dark-colored xenolith in the Cape Granite here in South Africa.</dd> </dl> </div> <p>You may recognize the above picture as it was <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/2012/01/23/monday-geology-picture-a-mafic-xenolith-in-the-cape-granite/">this week’s Monday Geology Picture.</a></p> <br class="clearfloat"/> </div> <p class="postmetadata">Posted in: <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/category/accretionary-wedge/" rel="category tag">Accretionary Wedge</a>, <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/category/countertop-geology/" rel="category tag">countertop geology</a>, <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/category/granite/" rel="category tag">granite</a>, <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/category/middle-east/" rel="category tag">Middle East</a>, <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/category/south-africa/" rel="category tag">South Africa</a>, <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/category/united-arab-emirates/" rel="category tag">United Arab Emirates</a>, <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/category/xenolith/" rel="category tag">xenolith</a> <span class="comments"> <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/2012/01/25/accretionary-wedge-42-countertop-geology/#respond">No Comments/Trackbacks »</a> </span></p> </div> </div> <div class="navigation"> <div class="alignleft"> <a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/2012/01/23/monday-geology-picture-a-mafic-xenolith-in-the-cape-granite/" rel="prev">← Previous Post</a> </div> <div class="alignright"> <a 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value="201">Presidents’ Day</option> <option class="level-0" value="409">pumice</option> <option class="level-0" value="305">quarry</option> <option class="level-0" value="479">quartz</option> <option class="level-0" value="202">Quaternary</option> <option class="level-0" value="369">rainbows</option> <option class="level-0" value="281">Red Rock Canyon</option> <option class="level-0" value="203">Reef</option> <option class="level-0" value="204">rivers</option> <option class="level-0" value="205">rock</option> <option class="level-0" value="348">rock arches</option> <option class="level-0" value="206">rock art</option> <option class="level-0" value="363">rock breaking</option> <option class="level-0" value="364">Roger Revelle</option> <option class="level-0" value="475">Rosetta Stone</option> <option class="level-0" value="207">ROV</option> <option class="level-0" value="295">Rutherford Gold Foil Experiment</option> <option class="level-0" value="306">rutile</option> <option class="level-0" value="328">Salt</option> <option class="level-0" value="329">Salt Flat</option> <option class="level-0" value="483">salt pan</option> <option class="level-0" value="208">Samail</option> <option class="level-0" value="209">Samira</option> <option class="level-0" value="210">San</option> <option class="level-0" value="211">Sand</option> <option class="level-0" value="317">sand dunes</option> <option class="level-0" value="212">Sand: The Never-ending Story</option> <option class="level-0" value="213">sandstone</option> <option class="level-0" value="435">Santorini</option> <option class="level-0" value="214">Scales</option> <option class="level-0" value="307">Schist</option> <option class="level-0" value="215">science blogging</option> <option class="level-0" value="460">science fiction</option> <option class="level-0" value="216">scientific drilling</option> <option class="level-0" value="217">scientific perspiration</option> <option class="level-0" value="218">seafloor map</option> <option class="level-0" value="219">sedimentary geology</option> <option class="level-0" value="220">sexism in science</option> <option class="level-0" value="405">Seychelles</option> <option class="level-0" value="354">shameless self-promotion</option> <option class="level-0" value="336">sheeted dikes</option> <option class="level-0" value="400">shipwrecks</option> <option class="level-0" value="424">signposts</option> <option class="level-0" value="221">Singapore</option> <option class="level-0" value="222">skepchick</option> <option class="level-0" value="223">skeptical blogging</option> <option class="level-0" value="224">Smithsonian</option> <option class="level-0" value="225">snow</option> <option class="level-0" value="355">social media</option> <option class="level-0" value="553">soil</option> <option class="level-0" value="226">South Africa</option> <option class="level-0" value="227">speleothem</option> <option class="level-0" value="228">Springfield tornado</option> <option class="level-0" value="229">stamps</option> <option class="level-0" value="230">statistics</option> <option class="level-0" value="407">Steffi Burchardt</option> <option class="level-0" value="433">Stellenbosch</option> <option class="level-0" value="560">stichtite</option> <option class="level-0" value="347">Storify</option> <option class="level-0" value="231">StormPulse</option> <option class="level-0" value="315">structural geology</option> <option class="level-0" value="232">subduction zone</option> <option class="level-0" value="233">sulfatara</option> <option class="level-0" value="438">Susan Humphris</option> <option class="level-0" value="455">Sutherland</option> <option class="level-0" value="234">Switzerland</option> <option class="level-0" value="488">Sydney</option> <option class="level-0" value="313">syncline</option> <option class="level-0" value="443">Table Mountain</option> <option class="level-0" value="235">technology</option> <option class="level-0" value="236">tektites</option> <option class="level-0" value="237">Ternary diagrams</option> <option class="level-0" value="238">Thailand</option> <option class="level-0" value="239">Thanksgiving</option> <option class="level-0" value="240">The Core</option> <option class="level-0" value="241">The Rock Cycle</option> <option class="level-0" value="242">The Stretch</option> <option class="level-0" value="426">theme park</option> <option class="level-0" value="243">Through the Sandglass</option> <option class="level-0" value="467">tillite</option> <option class="level-0" value="357">time</option> <option class="level-0" value="323">Tintin</option> <option class="level-0" value="244">Tips of the Continents</option> <option class="level-0" value="291">tor</option> <option class="level-0" value="245">tornadoes</option> <option class="level-0" value="246">trace fossils</option> <option class="level-0" value="247">trail runs</option> <option class="level-0" value="248">travel</option> <option class="level-0" value="249">travertine</option> <option class="level-0" value="437">Tsitsikamma Trail</option> <option class="level-0" value="250">tsunami</option> <option class="level-0" value="469">U-shaped valley</option> <option class="level-0" value="359">Ulexite</option> <option class="level-0" value="1">Uncategorized</option> <option class="level-0" value="333">United Arab Emirates</option> <option class="level-0" value="251">Uraninite</option> <option class="level-0" value="252">uranium mining</option> <option class="level-0" value="350">Urban Geology</option> <option class="level-0" value="349">Utah</option> <option class="level-0" value="253">Valentine’s Day</option> <option class="level-0" value="331">veins</option> <option class="level-0" value="254">vesicle</option> <option class="level-0" value="382">vitreous</option> <option class="level-0" value="255">volcanic bomb</option> <option class="level-0" value="256">volcano</option> <option 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value="272">Yellowstone</option> <option class="level-0" value="274">Zanclean</option> <option class="level-0" value="429">Zanzibar</option> <option class="level-0" value="275">Zayna</option> <option class="level-0" value="392">zeolite</option> </select> <script type="text/javascript"> /* <![CDATA[ */ (function() { var dropdown = document.getElementById( "cat" ); function onCatChange() { if ( dropdown.options[ dropdown.selectedIndex ].value > 0 ) { location.href = "https://web.archive.org/web/20170504194033/http://blogs.agu.org/georneys/?cat=" + dropdown.options[ dropdown.selectedIndex ].value; } } dropdown.onchange = onCatChange; })(); /* ]]> */ </script> </div><div id="archives-3" class="widget widget_archive"><h3 class="widgettitle">Archives</h3> <label class="screen-reader-text" for="archives-dropdown-3">Archives</label> <select id="archives-dropdown-3" name="archive-dropdown" onchange="document.location.href=this.options[this.selectedIndex].value;"> <option value="">Select 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href="https://web.archive.org/web/20170504194033/http://clasticdetritus.com/">Clastic Detritus</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://diamictite.blogspot.com/">Diamictite</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://earthlearningidea.blogspot.com/">Earth Learning Idea</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://all-geo.org/erratics/">Earth Science Erratics</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://epod.usra.edu/blog/">Earth Science Picture of the Day</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://earth-likeplanet.blogspot.com/">Earth-Like Planet</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://ediacaran.blogspot.com/">Ediacaran</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://freethoughtblogs.com/entequilaesverdad">En Tequila Es Verdad</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://www.wired.com/wiredscience/eruptions">Eruptions</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://fuzzyscience.wordpress.com/">Fuzzy Science</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://geo-development.blogspot.com/">Geology for Global Development</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://geologyhappens.blogspot.com/">Geology Happens</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://geologyinart.blogspot.com/">Geology in Art</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://geotripper.blogspot.com/">Geotripper</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://glacialtill.wordpress.com/">Glacial Till</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://iapetancaptain.wordpress.com/">Got the Time</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://all-geo.org/highlyallochthonous/">Highly Allochthonous</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://hinderedsettling.com/">Hindered Settling</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://blogs.scientificamerican.com/history-of-geology/">History of Geology</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://hudsonvalleygeologist.blogspot.com/">Hudson Valley Geologist</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://hypocentral.com/blog/">Hypo-theses</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://hypocentre.posterous.com/">Hypocentre's Rock 365 & 366</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://plantsandrocks.blogspot.com/">In the Company of Plants and Rocks</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://joidesresolution.org/blog">Joides Resolution Blog</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://knowledge-flocs.blogspot.com/">Knoweldge Flocs</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://www.wired.com/wiredscience/laelaps">Laelaps</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://helenaheliotrope.blogspot.com/">Liberty, Equality, and Geology</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://lifeinplanelight.wordpress.com/">Life in Plane Light</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://www.georgialifetraces.com/blog/">Life Traces of the Georgia Coast</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://highway8a.blogspot.com/">Looking For Detachment</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://lablemminglounge.blogspot.com/">Lounge of the Lab Lemming</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/magmacumlaude/">Magma Cum Laude</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://vatul.net/blog/index.php/category/geology">Maitri's Vatul Blog</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://all-geo.org/metageologist/">Metageologist</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/mountainbeltway/">Mountain Beltway</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://offtheshelfedge.wordpress.com/">Off the Shelf Edge</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://outsidetheinterzone.blogspot.com/">Outside The Interzone</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://www.paleoseismicity.org/">Paleoseismicity</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://poikiloblastic.wordpress.com/">Poikiloblastic</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://suvratk.blogspot.com/">Rapid Uplift</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://pascals-puppy.blogspot.com/">Research at a Snail's Pace</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://ron.outcrop.org/blog/">Ron Schott's Geology Home Companion Blog</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://blogs.scientificamerican.com/rosetta-stones/">Rosetta Stones</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://www.sandatlas.org/">Sandatlas</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://tannislikesrocks.blogspot.com/">Tannis Likes Rocks</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://theaccretionarywedge.wordpress.com/">The Accretionary Wedge</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://contemplativemammoth.wordpress.com/">The Contemplative Mammoth</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://matthewbonnan.wordpress.com/">The Evolving Paleontologist</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://blogs.agu.org/landslideblog/">The Landslide Blog</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://www.travelinggeologist.com/">The Traveling Geologist</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://tremblingearth.wordpress.com/">The Trembling Earth</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://throughthesandglass.typepad.com/through_the_sandglass/">Through the Sandglass</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://www.science20.com/tuff_guy">Tuff Guy</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://upsection.blogspot.com/">Up-Section</a></li> <li><a href="https://web.archive.org/web/20170504194033/http://www.watchingforrocks.com/">Watching for Rocks</a></li> <li><a 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