https://bereket-haileab.geology.sites.carleton.edu/files/original/a230e7f9a0d8bf14132792f1791ddeee.jpeg cc6d96115d604c936aed576d620c5c57 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 Igneous Rocks Subject The topic of the resource This collection covers both volcanic and intrusive rocks, including rhyolites, granites, diorites, andesites, basalts, gabbros, diabases, pumices, obsidians, syenites, phonolites, peridotites, carbonatites, dacites, trachyte, dunites, xenoliths, ignimbrites, and pegmatites. Creator An entity primarily responsible for making the resource Bereket Haileab Source A related resource from which the described resource is derived Housed in Anderson Hall, Carleton College. Format The file format, physical medium, or dimensions of the resource Thin sections, thin section scans, hand samples, hand sample images, photomicrographs, chemical analyses (major elements, trace elements and REE analyses for selected samples). Thin section and hand sample 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 BH250-131e Subject The topic of the resource Phonolite, Orendite, Orendite Wyominite, Lamproite Description An account of the resource Major Minerals: phlogopite, leucite <br />Minor Minerals: apatite, diopside, orthoclase<br /><br /> <p>Leucite Hills, Wyoming is a geologically fascinating area situated within the Rock Springs Uplift of southwestern Wyoming. It is renowned for its rare, leucite-rich volcanic rocks. These rocks are composed predominantly of ultrapotassic volcanic lithologies, including leucitite a rock characterized by fine-grained to porphyritic textures and abundant leucite (KAlSi₂O₆). The samples from Leucite Hills were collected by Cameron Webb, Josh Zoellmer, and Anderson Cole class of 2014! Thank you, guys!</p> <p>Petrology and mineralogy:<br />Leucite is the dominant feldspathoid mineral, commonly forming euhedral phenocrysts as well as fine grains within the groundmass.</p> <p>Phlogopite, a Ti-rich variety of mica, is widespread in some samples and appears as both groundmass flakes and phenocrysts.</p> <p>Nepheline occurs occasionally as an accessory feldspathoid mineral.</p> <p>&nbsp;</p> <p>Geochemistry:<br />The rocks are ultrapotassic, with K₂O contents often exceeding 10 wt% (see tables in chemical analysis) and plot in the phonolite field on the TAS diagram. They are rich in alkali oxides (Na₂O + K₂O) and display elevated concentrations of Large Ion Lithophile Elements (LILE) such as K, Rb, and Ba as seen in the spider diagram/Rare Earth Plot.</p> <p>Mica Types:<br />The primary micas found in Leucite Hills volcanic rocks are, phlogopite, including Ti-rich varieties, which are compositionally distinct. These micas occur as well-formed phenocrysts (up to several millimeters in size) and are mineralogically and chemically significant indicators of mantle metasomatism and magmatic conditions.</p> <br /><iframe width="1800" height="100" src="https://docs.google.com/spreadsheets/d/e/2PACX-1vS4nyqCmZQGn3t6vX4g4nhDPwHMBaKrigt1LaY2pykWbBGXB1wNb6FYArx625I-JTtD7lyg4uz1OS1r/pubhtml?gid=2074065796&amp;single=true&amp;widget=true&amp;headers=false"></iframe> Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Location: Leucite Hills, Wyoming, USA Nearby Geographic Feature: Zirkel Mesa GPS Coordinates: 41.7999068, -108.9228398 Source A related resource from which the described resource is derived From the rock collection of Bereket Haileab. Sample BH250-131e. Housed at Carleton College in Minnesota. Contributor An entity responsible for making contributions to the resource Bereket Haileab Cameron Webb '14, Josh Zoellmer '14, and Anderson Cole '14 Type The nature or genre of the resource Thin section and hand sample Relation A related resource <iframe width="100%" height="600" style="border: 0;" src="https://carleton.maps.arcgis.com/apps/instant/media/index.html?appid=e2bcc949a9b8447e83c8e832addee949" frameborder="0" allowfullscreen="allowfullscreen">iFrames are not supported on this page.</iframe><br />View on ArcGIS Online <a href="https://carleton.maps.arcgis.com/home/item.html?id=e2bcc949a9b8447e83c8e832addee949">here</a><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1eZ0IcJuvYK_WAxlexXnXLgQjVTp0IF0D/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1FJlD7T3yVXeJ2BTduUbl5PXIAITha7Vn/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1N890rgeLdNhbIEWkLAPBigk0psjM4ie1/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1y4Co33xBoWpXThSf5sif6aDCNmOuFXWS/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1pj-qt4ijsXLPxmU9rRQ6ezzytt_UVMNO/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1iNq5HYHhrReFMoGyTFOjzTS8fm-SPIwX/preview" allow="autoplay"></iframe> <br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1Q26A0X0eXTZUTeDIK_Scap170Z5txjR4/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1nnLF7ZHCbWYO3p-QmZ1PFlS4K6nITMJl/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/11WV2VTXe5FpzdgZx7hBav1eJskxBqr0X/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1vNbLBQnJ2nfXPOFcxyS41-2YtUh0fcNN/preview" allow="autoplay"></iframe><br /><br /><br /><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1EG9UmZ03I6aYKQSIRm16jQUlOzz7zSZO/preview" allow="autoplay"></iframe><br /><br /><iframe width="100%" height="480" src="https://drive.google.com/file/d/1gIQU3TaREAcJYlNvICoRmEry5l80MbcI/preview" allow="autoplay"></iframe><br />TAS diagram of BH250-131e <iframe width="100%" height="480" src="https://drive.google.com/file/d/1khKirwYAk86PCIJj6-Aq-pwCmWzDPDVv/preview" allow="autoplay"></iframe> Creator An entity primarily responsible for making the resource Bereket Haileab Feldspathoid minerals Feldspathoid volcanic rocks High K₂O content igneous intermediate Lamproite leucite Leucite Hills Leucitite Orendite Phlogopite phonolite Ti-rich phlogopite Ultrapotassic composition Ultrapotassic volcanic rocks volcanic Wyoming volcanics Wyominite Zirkel Mesa